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Prof. David Fangueiro
LEAF, Instituto Superior de Agronomia, Universidade de Lisboa, Lisbon, Portugal

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Journal article
Published: 20 May 2021 in Agronomy
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Rice farming systems (RFSs) in southern Mozambique are very heterogeneous and diversified, which has implications for smallholders’ adoption of each RFS, as well as on rice production and productivity in the region. In this regard, it is important to understand: (i) which RFS typologies can be leveraged to improve rice production and productivity; (ii) the drivers for smallholder farmers’ decisions to adopt an RFS; and (iii) which policies/incentives could enhance existing RFSs. The present study was based on surveys of 341 smallholder rice farmers in the Chókwè Irrigation Scheme (CIS), southern Mozambique. Data on the productivity of rice, size of the herd, and total other crop types were used to frame the RFS typologies. A multinomial logit model (MLM) and multiple linear regression (MLR) were applied to determine the driver for each RFS, and predict the constraints for production and yield. Based on cluster analysis, four typologies of RFSs were identified: the subsistence farming system (FS), specialised rice FS, mixed crops FS, and rice–livestock FS. Farms with longer experience reported applying more fertiliser and seedlings per unit hectare. The availability of labour increased the likelihood of adopting the mixed crops FS and rice–livestock FS. Older households were more likely to adopt the subsistence FS, and live closer to the farming fields. Yield of rice was positively associated with inputs such as fertilisers, pesticides, and seedlings, as well as years of experience of the household. Our results suggest that smallholder farmers need more assistance and technical support to identify and adopt more productive and less costly RFSs in this region.

ACS Style

Fátima Ismael; Aires Mbanze; Alexis Ndayiragije; David Fangueiro. Understanding the Dynamic of Rice Farming Systems in Southern Mozambique to Improve Production and Benefits to Smallholders. Agronomy 2021, 11, 1018 .

AMA Style

Fátima Ismael, Aires Mbanze, Alexis Ndayiragije, David Fangueiro. Understanding the Dynamic of Rice Farming Systems in Southern Mozambique to Improve Production and Benefits to Smallholders. Agronomy. 2021; 11 (5):1018.

Chicago/Turabian Style

Fátima Ismael; Aires Mbanze; Alexis Ndayiragije; David Fangueiro. 2021. "Understanding the Dynamic of Rice Farming Systems in Southern Mozambique to Improve Production and Benefits to Smallholders." Agronomy 11, no. 5: 1018.

Journal article
Published: 16 April 2021 in Agronomy
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The cost of chemical fertilizers is increasing and becoming unaffordable for smallholders in Africa. The present study aimed to assess the impact of combined fertilization strategies using urea and animal manure (beef cattle manure and poultry litter manure) on rice yield and nutrient uptake. For this, a field experiment was carried out on a loam sandy soil in the Chókwè Irrigation Scheme. We set seven treatments in a Randomized Complete Block Design (RCBD), namely: T0: no fertilizer, T1: 100% urea, T2: 100% beef cattle manure, T3: 100% poultry litter, T4: 50% urea + 50% beef cattle manure, T5: 50% urea + 50% poultry litter and T6: 40% urea + 30% beef cattle manure + 30% poultry litter, replicated four times each. All treatments, except T0, received an amount of nitrogen (N) equivalent to 100 kgN·ha−1. Results revealed that the highest yield grain (425 g·m−2), plant height (115 cm), number of tillers (18) and thousand-grain weight (34g) were observed in treatments combining urea with manure (T4, T5 and T6) indicating that N supply in the mixture (urea + manure) is more efficient than in isolated applications of N (T1, T2 and T3). The data obtained in this study suggest that a combination of fertilizers (T6) lead to competitive yields and is thus recommended for best soil management practices.

ACS Style

Fátima Ismael; Alexis Ndayiragije; David Fangueiro. New Fertilizer Strategies Combining Manure and Urea for Improved Rice Growth in Mozambique. Agronomy 2021, 11, 783 .

AMA Style

Fátima Ismael, Alexis Ndayiragije, David Fangueiro. New Fertilizer Strategies Combining Manure and Urea for Improved Rice Growth in Mozambique. Agronomy. 2021; 11 (4):783.

Chicago/Turabian Style

Fátima Ismael; Alexis Ndayiragije; David Fangueiro. 2021. "New Fertilizer Strategies Combining Manure and Urea for Improved Rice Growth in Mozambique." Agronomy 11, no. 4: 783.

Journal article
Published: 06 April 2021 in Agronomy
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Soil ecosystem perturbation due to agronomic practices can negatively impact soil productivity by altering the diversity and function of soil health determinants. Currently, the influence of rice cultivation and off-season periods on the dynamics of soil health determinants is unclear. Therefore, soil enzyme activities (EAs) and bacterial community compositions in rice-cultivated fields at postharvest (PH) and after a 5-month off-season period (5mR), and fallow-fields (5-years-fallow, 5YF; 10-years-fallow, 10YF and/or one-year-fallow, 1YF) were assessed in two agroecological regions of Mozambique. EAs were mostly higher in fallow fields than in PH, with significant (p < 0.05) differences detected for β-glucosidase and acid phosphatase activities. Only β-glucosidase activity was significantly (p < 0.05) different between PH and 5mR, suggesting that β-glucosidase is responsive in the short-term. Bacterial diversity was highest in rice-cultivated soil and correlated with NO3 −, NH4 + and electrical conductivity. Differentially abundant genera, such as Agromyces, Bacillus, Desulfuromonas, Gaiella, Lysobacter, Micromonospora, Norcadiodes, Rubrobacter, Solirubrobacter and Sphingomonas were mostly associated with fallow and 5mR fields, suggesting either negative effects of rice cultivation or the fallow period aided their recovery. Overall, rice cultivation and chemical parameters influenced certain EAs and shaped bacterial communities. Furthermore, the 5-month off-season period facilitates nutrient recovery and proliferation of plant-growth-promoting bacteria.

ACS Style

Obinna Ezeokoli; Valter Nuaila; Chinedu Obieze; Belo Muetanene; Irene Fraga; Maria Tesinde; Alexis Ndayiragije; João Coutinho; Ana Melo; Rasheed Adeleke; Ana Ribeiro-Barros; David Fangueiro. Assessing the Impact of Rice Cultivation and Off-Season Period on Dynamics of Soil Enzyme Activities and Bacterial Communities in Two Agro-Ecological Regions of Mozambique. Agronomy 2021, 11, 694 .

AMA Style

Obinna Ezeokoli, Valter Nuaila, Chinedu Obieze, Belo Muetanene, Irene Fraga, Maria Tesinde, Alexis Ndayiragije, João Coutinho, Ana Melo, Rasheed Adeleke, Ana Ribeiro-Barros, David Fangueiro. Assessing the Impact of Rice Cultivation and Off-Season Period on Dynamics of Soil Enzyme Activities and Bacterial Communities in Two Agro-Ecological Regions of Mozambique. Agronomy. 2021; 11 (4):694.

Chicago/Turabian Style

Obinna Ezeokoli; Valter Nuaila; Chinedu Obieze; Belo Muetanene; Irene Fraga; Maria Tesinde; Alexis Ndayiragije; João Coutinho; Ana Melo; Rasheed Adeleke; Ana Ribeiro-Barros; David Fangueiro. 2021. "Assessing the Impact of Rice Cultivation and Off-Season Period on Dynamics of Soil Enzyme Activities and Bacterial Communities in Two Agro-Ecological Regions of Mozambique." Agronomy 11, no. 4: 694.

Journal article
Published: 10 March 2021 in Agronomy
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Sanitization by pH adjustment of dairy and pig slurries was evaluated for potential use as organic fertilizer in horticulture. This requires absence of Salmonella in 25 g of slurry and less than 1000 Escherichi coli colony-forming unit per gram of fresh slurry (Regulation (EU) 2019/1009). Additives used in the alkalinization and acidification treatments, included hydroxide-salts and nitrogen-based reactants to increase slurry pH to a basic range (9.0–11.0) and concentrated H2SO4 to decrease slurry pH to an acidic range (5.5–3.5). While low-cost urea was unable to increase the slurry pH above 9.5, ammonia efficiently increased slurry pH to the targeted values (but enhanced the emissions risk), whereas the effect of Ca(OH)2 was hindered by its low solubility. Slurry sanitization by alkalinization was achieved at a pH of 9.5 for both slurries, using similar quantities of KOH or NaOH. KOH was selected for further tests since it provides a plant macronutrient. Acidification with concentrated H2SO4 was able to achieve sanitization by lowering the pH to 5.0. After a 60-d storage experiment with raw and treated slurries, the level of E. coli was below the sanitization limit for all samples. Storage had no significant impact on slurry characteristics, except for ammonium-nitrogen content. Acidification treatment minimized ammonia losses.

ACS Style

Joana Rodrigues; Paula Alvarenga; Ana Silva; Luísa Brito; Jorge Tavares; David Fangueiro. Animal Slurry Sanitization through pH Adjustment: Process Optimization and Impact on Slurry Characteristics. Agronomy 2021, 11, 517 .

AMA Style

Joana Rodrigues, Paula Alvarenga, Ana Silva, Luísa Brito, Jorge Tavares, David Fangueiro. Animal Slurry Sanitization through pH Adjustment: Process Optimization and Impact on Slurry Characteristics. Agronomy. 2021; 11 (3):517.

Chicago/Turabian Style

Joana Rodrigues; Paula Alvarenga; Ana Silva; Luísa Brito; Jorge Tavares; David Fangueiro. 2021. "Animal Slurry Sanitization through pH Adjustment: Process Optimization and Impact on Slurry Characteristics." Agronomy 11, no. 3: 517.

Journal article
Published: 17 February 2021 in Agronomy
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Biofilters are an effective air pollution control technology to break down gaseous contaminants and produce innocuous end products. This laboratory study aimed to evaluate a biofilter media, mainly composed by tomato waste, as packing material to reduce NH3, N2O, CO2 and CH4 losses from stored pig slurry. Three mixtures of packing materials, with and without oxalic acid, were arranged in treatments, namely: mixture of tomato waste, pine bark and agricultural compost; mixture of tomato waste and rice husk; tomato waste only. A control treatment (no biofilter) was also included. The experiments were conducted using a system of laboratory scale biofilters connected to jars filled with pig slurry and under a constant airflow rate. The gas concentrations were measured for 14 days and the physicochemical of the packing materials were assessed. Results showed that biofilter media mixtures had a potential for NH3 retention ranging from 51 to 77% and the addition of oxalic acid to these biofilters increased NH3 retention to 72–79%. Additionally, the biofilter media mixtures with and without oxalic acid showed a potential retention for CH4 (29–69%) but not for N2O, yet with no impact on the global warming potential. It can be concluded that tomato based biofilters had the potential to reduce gaseous emissions from slurry.

ACS Style

José Pereira; Adelaide Perdigão; Francisco Marques; Catarina Coelho; Mariana Mota; David Fangueiro. Evaluation of Tomato-Based Packing Material for Retention of Ammonia, Nitrous Oxide, Carbon Dioxide and Methane in Gas Phase Biofilters: A Laboratory Study. Agronomy 2021, 11, 360 .

AMA Style

José Pereira, Adelaide Perdigão, Francisco Marques, Catarina Coelho, Mariana Mota, David Fangueiro. Evaluation of Tomato-Based Packing Material for Retention of Ammonia, Nitrous Oxide, Carbon Dioxide and Methane in Gas Phase Biofilters: A Laboratory Study. Agronomy. 2021; 11 (2):360.

Chicago/Turabian Style

José Pereira; Adelaide Perdigão; Francisco Marques; Catarina Coelho; Mariana Mota; David Fangueiro. 2021. "Evaluation of Tomato-Based Packing Material for Retention of Ammonia, Nitrous Oxide, Carbon Dioxide and Methane in Gas Phase Biofilters: A Laboratory Study." Agronomy 11, no. 2: 360.

Journal article
Published: 06 February 2021 in Geoderma
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Climate change-driven increases in aridity will lead to dryland expansion worldwide. In the Atlantic and Mediterranean biogeographic regions, coastal dunes are priority conservation areas highly sensitive to aridification where plants and biological soil crusts may play a key role maintaining ecosystem services. However, we still need further insights into the balance between the effects of increasing aridity and the influence of local vegetation on the soil attributes and functioning of these systems, particularly in transitional areas between humid and arid climatic zones. We sampled 24 dune systems distributed along a natural climate gradient including humid, dry-subhumid and arid environments in the Atlantic coastline of the Iberian Peninsula and investigated (i) how aridity drives the vegetation community structure, soil biotic and abiotic properties and functions in dune ecosystems at a regional scale; and (ii) to what extent soil attributes differ locally under diverse surface microsites (i.e. plants, biocrust and bare soil). Increasing aridity in coastal dunes decreased total biotic cover and favoured the formation of shrub-dominated patches. Vegetation shifts were accompanied by declines in soil microbial diversity, organic matter, nutrient contents and reduced rates of N mineralization. Soil bacterial communities were more sensitive to aridity than fungal communities. Microsites were essential regulators of soil attributes, and their effects were dependent on the degree of aridity. In drylands, shrub microsites were associated to higher soil organic C, microbial (bacterial and fungal) abundance, fungal diversity and potential heterotrophic respiration than bare microsites, likely due to enhanced litter and sediment redistribution. However, at humid and transition systems, microsites controlled soil N pools and microbial diversity, suggesting tight linkages between vegetation patches and soil microorganisms responsible for N availability. These findings provide evidence of the strong negative impacts of aridification on vegetation attributes and nutrient cycling in coastal dunes and highlight the role of the biotic cover in preserving soil fertility, microbial diversity and functioning, particularly in the most arid sites.

ACS Style

María José Fernández-Alonso; Alexandra Rodríguez; Laura García-Velázquez; Everaldo Dos Santos; Luciana de Almeida; Angela Lafuente; Jun-Tao Wang; Brajesh Singh; David Fangueiro; Jorge Durán. Integrative effects of increasing aridity and biotic cover on soil attributes and functioning in coastal dune ecosystems. Geoderma 2021, 390, 114952 .

AMA Style

María José Fernández-Alonso, Alexandra Rodríguez, Laura García-Velázquez, Everaldo Dos Santos, Luciana de Almeida, Angela Lafuente, Jun-Tao Wang, Brajesh Singh, David Fangueiro, Jorge Durán. Integrative effects of increasing aridity and biotic cover on soil attributes and functioning in coastal dune ecosystems. Geoderma. 2021; 390 ():114952.

Chicago/Turabian Style

María José Fernández-Alonso; Alexandra Rodríguez; Laura García-Velázquez; Everaldo Dos Santos; Luciana de Almeida; Angela Lafuente; Jun-Tao Wang; Brajesh Singh; David Fangueiro; Jorge Durán. 2021. "Integrative effects of increasing aridity and biotic cover on soil attributes and functioning in coastal dune ecosystems." Geoderma 390, no. : 114952.

Review
Published: 29 January 2021 in Sustainability
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Animal manure management is a real challenge to minimize environmental impacts and ensure that this valuable material is efficiently used in a circular economy context. One of the main limitations for larger use of animal manure as fertilizer is the availability of land to receive it in an area close to the farm. Indeed, animal manure is traditionally used for cereals and animal feed growth, but the soil area occupied with these crops might not be enough to receive all the manure produced and/or part of this soil might have nutrient contents, namely phosphorous, that do not permit further application of manure. Hence, extra land used for other agricultural activities might be an option. The main objective of the present review was to analyse the constraints and solutions to increase the use of manure in horticulture and orchards. Emphasis was given to the legal framework for manure utilization in the EU that might stimulate or restrain such a solution. The main characteristics of manure that might limit or stimulate manure reuse were also described, and the potential of some treatments to valorise manure was analysed. Several examples of alternative uses of manure in horticulture and orchards were examined, and the society and farmers' acceptance of the proposed solution was addressed.

ACS Style

David Fangueiro; Paula Alvarenga; Rita Fragoso. Horticulture and Orchards as New Markets for Manure Valorisation with Less Environmental Impacts. Sustainability 2021, 13, 1436 .

AMA Style

David Fangueiro, Paula Alvarenga, Rita Fragoso. Horticulture and Orchards as New Markets for Manure Valorisation with Less Environmental Impacts. Sustainability. 2021; 13 (3):1436.

Chicago/Turabian Style

David Fangueiro; Paula Alvarenga; Rita Fragoso. 2021. "Horticulture and Orchards as New Markets for Manure Valorisation with Less Environmental Impacts." Sustainability 13, no. 3: 1436.

Technical note
Published: 24 November 2020 in Tropical Animal Health and Production
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The Azores archipelago is the most suitable region for dairy production in Portugal, representing 30% of the overall Portuguese dairy production. It has a production system characterized by an average milk yield of 6216 kg/cow/year, and the predominance of pasture-based feeding and cows that have longer productive lives and lower incidence of metabolic/production diseases, such as acidosis or mastitis. The biggest problem with the Azores Islands dairy sector is the cost of transport, as the main markets are located in continental Portugal, over 1500 km away, and local dairy products have to compete with dairy products produced in mainland Portugal and in the rest of the European Union. Herein, the evolution of the dairy sector in the Azores Islands from 2007 to 2017 is presented. A SWOT (Strength, Weakness, Opportunity, and Threat) analysis was performed to find potential solutions to increase the value of the Azorean dairy sector. The most relevant solution considered was the valorization of the dairy production through three major aspects: higher milk quality, namely, better organoleptic properties; lower carbon footprint (not considering transport costs); and higher levels of animal welfare. Three examples are shown of such valorization: protected denomination of origin (PDO) cheeses, the “happy cows” program, and the production of an organic milk, from the Terceira Island. Some of these programs are relatively recent, so, it will be interesting to see how their sales and acceptance by consumers evolve, particularly under the current economic framework.

ACS Style

André M. de Almeida; Paula Alvarenga; David Fangueiro. The dairy sector in the Azores Islands: possibilities and main constraints towards increased added value. Tropical Animal Health and Production 2020, 53, 1 -9.

AMA Style

André M. de Almeida, Paula Alvarenga, David Fangueiro. The dairy sector in the Azores Islands: possibilities and main constraints towards increased added value. Tropical Animal Health and Production. 2020; 53 (1):1-9.

Chicago/Turabian Style

André M. de Almeida; Paula Alvarenga; David Fangueiro. 2020. "The dairy sector in the Azores Islands: possibilities and main constraints towards increased added value." Tropical Animal Health and Production 53, no. 1: 1-9.

Research article
Published: 30 May 2020 in Communications in Soil Science and Plant Analysis
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In this work the effect of the addition of different amounts of cattle slurry (CS) to a Cd contaminated soil, was studied regarding its effect in spinach plants. Two levels of Cd contamination (2 and 10 mg/kg) and three levels of CS addition were evaluated (2.5, 5 and 10 g CS/100 g soil). Spinach was shown to be a tolerant species, able to accumulate relatively high amounts of Cd (up to 367.7 mg/kg in the leaves), exceeding the limits established by European regulations for leaf vegetables. The addition of 2.5 and 5 g CS/100 g to soil containing 2 mg/kg Cd did not reduce the uptake of this metal but allowed the plants to grow as much as the control. The addition of 10 g CS/100 g lead to a reduced Cd uptake but also to a lower plant growth compared to the lower CS levels. The combined effects of Cd and CS changed element content in the plant, but without causing severe toxicity or deficiency effects.

ACS Style

Filipa R. Pinto; Miguel P. Mourato; Joana R. Sales; David Fangueiro; Luísa Louro Martins. Effect of Cattle Slurry on the Growth of Spinach Plants in Cd-contaminated Soil. Communications in Soil Science and Plant Analysis 2020, 51, 1370 -1381.

AMA Style

Filipa R. Pinto, Miguel P. Mourato, Joana R. Sales, David Fangueiro, Luísa Louro Martins. Effect of Cattle Slurry on the Growth of Spinach Plants in Cd-contaminated Soil. Communications in Soil Science and Plant Analysis. 2020; 51 (10):1370-1381.

Chicago/Turabian Style

Filipa R. Pinto; Miguel P. Mourato; Joana R. Sales; David Fangueiro; Luísa Louro Martins. 2020. "Effect of Cattle Slurry on the Growth of Spinach Plants in Cd-contaminated Soil." Communications in Soil Science and Plant Analysis 51, no. 10: 1370-1381.

Journal article
Published: 09 April 2020 in Journal of Cleaner Production
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Several solutions are today proposed to farmers to minimize ammonia (NH3) emissions during storage. In the present study, special attention was given to slurry acidification and slurry crust enhancement and our objective was to assess the effect of slurry bio-acidification using sugar and cheese whey as an alternative to sulphuric acid, and the potential of rice bran as crust enhancer on NH3 and greenhouse gases emissions during storage. Both the cheese whey and the rice bran are materials, available in large amounts, with low commercial value in some EU regions as Portugal and its use, at farm scale, will be a win-win situation. Sugar is also a good alternative to acid attending its relatively low value. A laboratory experiment was performed for 2 months with five treatments: non-treated cattle slurry (CTRL), slurry treated with sulphuric acid (ACID), slurry treated with sugar (SUGAR), slurry treated with cheese whey (WHEY) and rice bran applied on the slurry surface (RICE). The SUGAR treatment led to a reduction of NH3 emissions by 45% relative to CTRL while WHEY and RICE resulted in a reduction of 68% and 25%, respectively. Nevertheless, this effect of SUGAR and WHEY was shorter than in ACID, since NH3 emissions started to be observed in those 2 treatments after 31 and 35 days of storage, respectively. Nitrous oxide emissions remained close to zero in ACID and SUGAR. RICE led to the highest emissions of carbon dioxide (CO2) releasing almost 5% of carbon present in the initial mixture (slurry + rice bran) and presented the highest methane emissions. The ACID and SUGAR led to a significant decrease of the total greenhouse gas (GHG) emissions. Our results indicate that bio-acidification using a source of sugar could be a good alternative to H2SO4 to reduce simultaneously NH3 and GHG emissions during storage.

ACS Style

Joana Prado; João Chieppe; Anabela Raymundo; David Fangueiro. Bio-acidification and enhanced crusting as an alternative to sulphuric acid addition to slurry to mitigate ammonia and greenhouse gases emissions during short term storage. Journal of Cleaner Production 2020, 263, 121443 .

AMA Style

Joana Prado, João Chieppe, Anabela Raymundo, David Fangueiro. Bio-acidification and enhanced crusting as an alternative to sulphuric acid addition to slurry to mitigate ammonia and greenhouse gases emissions during short term storage. Journal of Cleaner Production. 2020; 263 ():121443.

Chicago/Turabian Style

Joana Prado; João Chieppe; Anabela Raymundo; David Fangueiro. 2020. "Bio-acidification and enhanced crusting as an alternative to sulphuric acid addition to slurry to mitigate ammonia and greenhouse gases emissions during short term storage." Journal of Cleaner Production 263, no. : 121443.

Journal article
Published: 10 January 2020 in Science of The Total Environment
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In the present work, it was hypothesized that through modelling it is possible to overcome the constraints that arise in the quantification of N pollution swapping associated to slurry application practices when using individual experimental data. For this, environmental N losses were assessed under two methods of dairy slurry application to a double cropping system (rainfed oats (Avena strigosa)/irrigated maize (Zea mays)) in two different soils. An integrated experimentation and modelling approach was applied using the RZWQM2 model. The model was first tested using four years of experimental data concerning N fluxes to/from different environmental compartments (soil mineralization, N gas emissions, and N leaching). The model estimated emissions with overall efficiencies of ~70% and r2 ~ 0.75. Total N losses were higher for surface band application (95.4 and 40.2 kg ha−1 for the sandy and sandy loam soils, respectively). However, when slurry was injected, nitrate leaching considerably increased (by 107 and 64% for the sandy and sandy loam soils, respectively), even though gas emissions were minimized. This N swapping among path losses requires targeting of the N mitigation measures to the environmental compartment showing the highest vulnerability. Generally, the estimated emission factors (EFs) were lower than or equal to (slurry injection in the sandy loam soil) the IPCC default. The values showed high variability, reinforcing the need to use agricultural system specific EFs. The methodologies used in this study, focused on scenario analysis, can support policy as they can be used to set up integral strategies to decrease N emissions from livestock farming systems, taking into account possible synergies and antagonisms produced by the measures among NH3 and N2O emissions and NO3− leaching.

ACS Style

Maria Do Rosário Cameira; Rick Li; David Fangueiro. Integrated modelling to assess N pollution swapping in slurry amended soils. Science of The Total Environment 2020, 713, 136596 .

AMA Style

Maria Do Rosário Cameira, Rick Li, David Fangueiro. Integrated modelling to assess N pollution swapping in slurry amended soils. Science of The Total Environment. 2020; 713 ():136596.

Chicago/Turabian Style

Maria Do Rosário Cameira; Rick Li; David Fangueiro. 2020. "Integrated modelling to assess N pollution swapping in slurry amended soils." Science of The Total Environment 713, no. : 136596.

Journal article
Published: 17 December 2018 in Soil and Tillage Research
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The aim of the present work was to assess the impact of raw slurry injection and band application of acidified slurry upon nitrate leaching in two different soils under Mediterranean conditions. A lysimeter experiment with a winter crop (oat - Avena sativa) was performed over three years presenting significant inter-annual precipitation variability. Four fertilization treatments using dairy cattle slurry were implemented. Nitrate leaching was estimated using nitrate concentration in soil solution assessed through ceramic suction cups and drainage calculated using the Agricultural System Root Zone Water Quality Model (RZWQM2). Results show that the RZWQM2 was able to predict drainage with an average efficiency of 89%. Cumulative drainage averaged 69 and 65% of the precipitation for the sandy and the sandy loam soils, respectively. The application of acidified slurry did not lead to any increase of nitrate leaching relative to band application or injection of raw slurry. Soil incorporation following soil application of acidified slurry is highly relevant regarding nitrate leaching since it significantly reduced nitrate leaching in more than 50% in the sandy soil and close to 40% in the sandy loam soil. A severe risk of pollution swapping was observed with slurry injection since it led to an increase of nitrate leaching relative to band application of raw or acidified slurry (more than 100% in the sandy soil and around 30% in the sandy loam soil for the rainiest year). According to the results, band application of acidified slurry is an efficient alternative to raw slurry injection to minimize nitrogen losses by leaching. Nevertheless, soil incorporation of acidified slurry, not necessary in terms of ammonia emissions, is strongly recommended to reduce nitrate leaching.

ACS Style

Maria Do Rosário Cameira; Fernanda Valente; Rick Li; Sónia Surgy; Francisco G. Abreu; João Coutinho; David Fangueiro. Band application of acidified slurry as an alternative to slurry injection in Mediterranean winter conditions: Impact on nitrate leaching. Soil and Tillage Research 2018, 187, 172 -181.

AMA Style

Maria Do Rosário Cameira, Fernanda Valente, Rick Li, Sónia Surgy, Francisco G. Abreu, João Coutinho, David Fangueiro. Band application of acidified slurry as an alternative to slurry injection in Mediterranean winter conditions: Impact on nitrate leaching. Soil and Tillage Research. 2018; 187 ():172-181.

Chicago/Turabian Style

Maria Do Rosário Cameira; Fernanda Valente; Rick Li; Sónia Surgy; Francisco G. Abreu; João Coutinho; David Fangueiro. 2018. "Band application of acidified slurry as an alternative to slurry injection in Mediterranean winter conditions: Impact on nitrate leaching." Soil and Tillage Research 187, no. : 172-181.

Data article
Published: 27 October 2018 in Data in Brief
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The current data article presents a set of fluxes of ammonia (NH3), nitrous oxide (N2O), methane (CH4), and carbon dioxide (CO2) measured from two different soils under a Mediterranean double-cropping system (oat in autumn/winter followed by maize in spring/summer). The two soils were fertilized using four different treatments: (i) Injection of raw cattle slurry (100 mm depth), (ii) application of raw cattle slurry followed by soil incorporation (20 mm depth), (iii) band application of acidified (pH=5.5) cattle slurry followed by soil incorporation (20 mm depth), and (iv) band application of acidified (pH=5.5) cattle slurry without soil incorporation. A non-amended soil was also considered as control treatment. The data presented here were obtained over a three years experiment between 2012 and 2015. Fluxes were measured in a period between slurry applications to soil (before plant seeding) till crop harvest. The data presented here are supporting the research article "Band application of acidified slurry as an alternative to slurry injection in a Mediterranean double-cropping system: Agronomic effect and gaseous emissions" (Fangueiro et al., 2018).

ACS Style

David Fangueiro; José L.S. Pereira; Irene Fraga; Sónia Surgy; Ernesto Vasconcelos; João Coutinho. Dataset on ammonia, nitrous oxide, methane, and carbon dioxide fluxes from two soils fertilized amended with treated and non-treated cattle slurry. Data in Brief 2018, 21, 1558 -1567.

AMA Style

David Fangueiro, José L.S. Pereira, Irene Fraga, Sónia Surgy, Ernesto Vasconcelos, João Coutinho. Dataset on ammonia, nitrous oxide, methane, and carbon dioxide fluxes from two soils fertilized amended with treated and non-treated cattle slurry. Data in Brief. 2018; 21 ():1558-1567.

Chicago/Turabian Style

David Fangueiro; José L.S. Pereira; Irene Fraga; Sónia Surgy; Ernesto Vasconcelos; João Coutinho. 2018. "Dataset on ammonia, nitrous oxide, methane, and carbon dioxide fluxes from two soils fertilized amended with treated and non-treated cattle slurry." Data in Brief 21, no. : 1558-1567.

Journal article
Published: 25 August 2018 in Agriculture, Ecosystems & Environment
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Injection is the recommended technique for slurry application to soil in most European countries but its utilization at the farm scale is quite limited, namely in countries from southern Europe, due to the strong investment needed in machinery and problematic utilization in stony and/or heavy soils. Acidification of animal slurry has proved to be efficient at minimising NH3 emissions but little is known about its impact on other greenhouse gas (GHG) emissions or agronomic effect, particularly in Mediterranean conditions. In the present study, we evaluate the potential of band application of acidified slurry as an alternative to raw slurry injection, in terms of agronomic effects and NH3 and GHG emissions, for two different Mediterranean soils (a sandy and a sandy-loam soil) where a double-cropping system (oat during winter and maize during spring/summer) was run over 3-years. Five treatments were tested in 1 m2 field plots: 1) control (non amended soil); 2) injected slurry (IS); 3) band application of raw slurry followed by soil incorporation (SS); 4) band application of acidified slurry followed by soil incorporation (AS); 5) band application of acidified slurry with no soil incorporation (ASS). An amount of slurry equivalent to ∼90 and 170 kg N ha−1 was applied before oat and maize sowing, respectively. The dry matter yields obtained with the AS treatment, in both the maize and oat crops, were mostly similar to or higher than those of IS, while ASS led - on some occasions - to small decreases in dry matter yield relative to IS, namely in the sandy soil. Treatment AS led also to apparent N and P recovery values (ANR and APR, respectively) similar to or higher than those of IS, except in the sandy soil during oat growth. After six consecutive slurry applications, a significant decrease of pH and an increase of the extractable S content were observed in soil receiving acidified slurry, relative to soil amended with non-acidified slurry. Significant NH3 emissions were observed only in SS treatment during all the experiment. Of the total N applied, the amount lost as N2O did not differ significantly among the amendment treatments during the oat growth. However, the cumulative N2O emissions from IS were significantly higher, relative to SS, AS and ASS, during maize growth. Higher cumulative CH4 emissions were observed during maize growth relative to oat growth, namely from IS compared to all other treatments. Band application of acidified slurry without soil incorporation reduced the N2O and CH4 emissions by 65% and 40%, respectively, relative to IS. The soil characteristics had no significant effect on the gaseous emissions for the acidified slurry treatments. It can be concluded that band application of acidified slurry followed by soil incorporation is an efficient solution to provide nutrients to plants while minimising NH3 and GHG emissions and can thus be proposed as an alternative to injection. Nevertheless, the impact of acidified slurry application on soil properties needs to be monitored in the long term.

ACS Style

David Fangueiro; José L.S. Pereira; Irene Fraga; Sónia Surgy; Ernesto Vasconcelos; João Coutinho. Band application of acidified slurry as an alternative to slurry injection in a Mediterranean double cropping system: Agronomic effect and gaseous emissions. Agriculture, Ecosystems & Environment 2018, 267, 87 -99.

AMA Style

David Fangueiro, José L.S. Pereira, Irene Fraga, Sónia Surgy, Ernesto Vasconcelos, João Coutinho. Band application of acidified slurry as an alternative to slurry injection in a Mediterranean double cropping system: Agronomic effect and gaseous emissions. Agriculture, Ecosystems & Environment. 2018; 267 ():87-99.

Chicago/Turabian Style

David Fangueiro; José L.S. Pereira; Irene Fraga; Sónia Surgy; Ernesto Vasconcelos; João Coutinho. 2018. "Band application of acidified slurry as an alternative to slurry injection in a Mediterranean double cropping system: Agronomic effect and gaseous emissions." Agriculture, Ecosystems & Environment 267, no. : 87-99.

Original research article
Published: 29 March 2018 in Frontiers in Sustainable Food Systems
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Composts were prepared from the solid fraction of pig slurry (SPS) by mixing with cotton gin waste (CGW) in two different proportions. The aim was to assess the fertilizer value of the two composts and to evaluate potential pollution risks due to the heavy metal (Cu and Zn) concentrations in the composts and the nitrate leaching following their soil application. For this, a pot trial using Italian ryegrass (Lolium multiflorum Lam.) as a test plant was run in a glasshouse. Two composts, A and B, prepared with SPS:CGW ratios of 4:3 and 3:4 (v:v), respectively (OM 63 and 57%, TN 36.1 and 32.7%, and TP 15.3 and 10.8 g kg−1 in A and B, respectively), were applied to a sandy-loam soil at two doses based on the N supplied (D1: 360 mg TN pot−1, equivalent to 52 kg N ha−1, and D2: 720 mg TN pot−1). They were compared with a soluble mineral fertilizer (3.62 g pot−1 of N:P:K 10:10:10; providing 360 mg N pot−1); unfertilized control soil was also tested. The potential risk of nitrate-N leaching in the soil after two simulated intense rainfall events was evaluated. The experiment was carried out in double-layer pots, which allowed the collection of leachates. Both composts were able to increase plant biomass production and soil TN and available P with respect to the control; available Cu and Zn in the soil did not increase significantly with respect to the control soil and mineral fertilizer treatment, although N deficiency limited plant growth at harvests 2 and 3. The compost prepared with a higher proportion of SPS (A) was more efficient for N fertilization (relative agronomic efficiency: 38.1–47.6%; nitrogen use efficiency: 34.1–41.9% of TN), due to its greater inorganic-N concentration. To obtain high P and K efficiencies, application rates based on compost TN are recommended, which also prevent Cu and Zn soil enrichment. Nitrate leaching was very low in all treatments (<0.5% of TN applied). Therefore, both composts can be used as organic fertilizers in the partial substitution of mineral fertilizers, without a significant nitrate leaching risk.

ACS Style

André Santos; David Fangueiro; Raul Moral; Maria Pilar Bernal. Composts Produced From Pig Slurry Solids: Nutrient Efficiency and N-Leaching Risks in Amended Soils. Frontiers in Sustainable Food Systems 2018, 2, 1 .

AMA Style

André Santos, David Fangueiro, Raul Moral, Maria Pilar Bernal. Composts Produced From Pig Slurry Solids: Nutrient Efficiency and N-Leaching Risks in Amended Soils. Frontiers in Sustainable Food Systems. 2018; 2 ():1.

Chicago/Turabian Style

André Santos; David Fangueiro; Raul Moral; Maria Pilar Bernal. 2018. "Composts Produced From Pig Slurry Solids: Nutrient Efficiency and N-Leaching Risks in Amended Soils." Frontiers in Sustainable Food Systems 2, no. : 1.

Original paper
Published: 19 December 2017 in Waste and Biomass Valorization
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The yeast production industry (e.g. distillery, brewing, baking industries) has been growing globally over the last years generating a large amount of sub-products rich in organic matter that could be used as soil improvers or organic fertilizers. A set of laboratory experiments were performed to investigate the impact of yeast waste application to an acidic sandy soil on potential nutrient leaching and gaseous emissions. Experimental treatments were: surface application of yeast (CMSs) and decanted-yeast (CMSds), surface application of yeast (CMSm) and decanted-yeast (CMSdm) followed by incorporation in the 0–5 cm soil layer, surface application of ammonium nitrate (AN) and unfertilized soil (CTR). A leaching experiment (73-day period) with six irrigation events every 2 weeks was performed (6 treatments × 4 replicates) to assess N and P losses. Two parallel incubations (6 treatments × 3 replicates) were simultaneously performed to measure GHG emissions (CO2, N2O, CH4) and to assess the N mineralization in each treatment. Results showed that yeast application increased initial NH4+ concentration in leachates and soil relative to unfertilized soil and NO3− concentrations increased afterwards. Furthermore, yeast waste led to a significantly increase of N2O and CO2 in the first days of incubation. Gaseous emissions in AN treatment were very similar to unfertilized soil even if a small increase of N2O was also observed. CH4 emissions were insignificant in all treatments during the whole experiment. It is still to refer that the global warming potential of yeast and AN treatments were 6× and 2× times higher than control, respectively. Our results obtained in an acidic sandy soil allow concluding that yeast waste can be applied to soil as organic fertilizer since it provide not only nitrogen and potassium to plants but also contribute to increase soil organic matter content. Nevertheless, the potential nitrate leaching and increase of GHG emissions induced by yeast application to soil have to be carefully monitored to avoid environmental problems. Similar studies using different soil types as well as field experiments are still needed to confirm our conclusions.

ACS Style

Ricardo Mata; Sandro Ratinho; David Fangueiro. Assessment of the Environmental Impact of Yeast Waste Application to Soil: An Integrated Approach. Waste and Biomass Valorization 2017, 10, 1767 -1777.

AMA Style

Ricardo Mata, Sandro Ratinho, David Fangueiro. Assessment of the Environmental Impact of Yeast Waste Application to Soil: An Integrated Approach. Waste and Biomass Valorization. 2017; 10 (6):1767-1777.

Chicago/Turabian Style

Ricardo Mata; Sandro Ratinho; David Fangueiro. 2017. "Assessment of the Environmental Impact of Yeast Waste Application to Soil: An Integrated Approach." Waste and Biomass Valorization 10, no. 6: 1767-1777.

Journal article
Published: 01 November 2017 in Geoderma
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ACS Style

David Fangueiro; José Luís Da Silva Pereira; Sofia Macedo; Henrique Trindade; Ernesto Vasconcelos; João Coutinho. Surface application of acidified cattle slurry compared to slurry injection: Impact on NH3, N2O, CO2 and CH4 emissions and crop uptake. Geoderma 2017, 306, 160 -166.

AMA Style

David Fangueiro, José Luís Da Silva Pereira, Sofia Macedo, Henrique Trindade, Ernesto Vasconcelos, João Coutinho. Surface application of acidified cattle slurry compared to slurry injection: Impact on NH3, N2O, CO2 and CH4 emissions and crop uptake. Geoderma. 2017; 306 ():160-166.

Chicago/Turabian Style

David Fangueiro; José Luís Da Silva Pereira; Sofia Macedo; Henrique Trindade; Ernesto Vasconcelos; João Coutinho. 2017. "Surface application of acidified cattle slurry compared to slurry injection: Impact on NH3, N2O, CO2 and CH4 emissions and crop uptake." Geoderma 306, no. : 160-166.

Regular article
Published: 27 October 2017 in Plant and Soil
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To evaluate the efficiency of acidified (to pH 5.5) and dried digestate solids as a fertilization product in a pot experiment with ryegrass. The NH4-N pool of the solids was labelled with 15N prior to acidification and drying to estimate plant N uptake efficiency. The effect of digestate solids on plant growth and N and P uptake was compared to the effect of different mineral N-P fertilization combinations. Non-acidified dried digestate solids showed inferior N fertilization performance compared to their raw and acidified counterparts, and higher drying temperature reduced solids N mineralization. More than 40% of the NH4-N in the raw, raw acidified and acidified dried solids treatments was recovered by the ryegrass over 5-months, similar to recovery with medium mineral N rates, resulting in mineral fertilizer equivalency of 32–41%. Digestate solids treatment altered the water extractable P of the solids, but less so the ryegrass P uptake, mainly due to the buffer capacity of the soil. However, ryegrass P uptake in non-acidified dried solids treatments was probably inhibited by poor growth due to low N availability. Acidification of digestate solids prior to drying may be an important treatment to maintain the solids fertilizing value while enhancing its manageability.

ACS Style

Athanasios Pantelopoulos; Jakob Magid; Lars Stoumann Jensen; David Fangueiro. Nutrient uptake efficiency in ryegrass fertilized with dried digestate solids as affected by acidification and drying temperature. Plant and Soil 2017, 421, 401 -416.

AMA Style

Athanasios Pantelopoulos, Jakob Magid, Lars Stoumann Jensen, David Fangueiro. Nutrient uptake efficiency in ryegrass fertilized with dried digestate solids as affected by acidification and drying temperature. Plant and Soil. 2017; 421 (1-2):401-416.

Chicago/Turabian Style

Athanasios Pantelopoulos; Jakob Magid; Lars Stoumann Jensen; David Fangueiro. 2017. "Nutrient uptake efficiency in ryegrass fertilized with dried digestate solids as affected by acidification and drying temperature." Plant and Soil 421, no. 1-2: 401-416.

Original paper
Published: 14 February 2017 in Biology and Fertility of Soils
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The objective of the present study was to evaluate the impact of the treatment of slurry liquid fraction (LF) acidified to pH 5.5 (ALF) on nitrification and denitrification processes after soil application. The impact of such treatment was compared with that of untreated LF, LF treated with a nitrification inhibitor (3,4-Dimethylpyrazole phosphate (DMPP)) (LF + DMPP). An incubation was conducted using the denitrification incubation system (DENIS/gas-flow-core technique) at a constant temperature of 20 °C and lasted for 32 days in order to follow nitrogen dynamics and gaseous emissions (N2O, NO, CO2) from soil. Inhibition of ammonium nitrification and nitrate accumulation was evident in both LF + DMPP and ALF at the top soil (0–3.75 cm) and those effects were stronger in the LF + DMPP. Denitrification was the main source of N2O emissions from soils amended with treated and untreated LF. Compared to the untreated LF, the ALF significantly reduced the total N lost as N2O from 0.10% to 0.05% of the applied N whereas the DMPP reduced the total N lost as N2O from 0.10% to 0.07%. Relative to the untreated LF, the ALF reduced the total N lost as NO emissions from 0.03% to 0.02% of the applied N whereas DMPP addition led to a stronger decrease from 0.03% to 0.01%. Both, ALF and LF + DMPP had no impact on CO2 emissions relative to the untreated LF. The ALF reduced CO2 emissions by 19% relative to the LF + DMPP. Our results demonstrate that slurry acidification affect not only nitrification but also the denitrification process. This suggests that slurry acidification is a valid technique to minimize N emissions.

ACS Style

M.Y Owusu-Twum; Nadine Loick; L. M. Cardenas; João Coutinho; H. Trindade; D. Fangueiro. Nitrogen dynamics in soils amended with slurry treated by acid or DMPP addition. Biology and Fertility of Soils 2017, 53, 339 -347.

AMA Style

M.Y Owusu-Twum, Nadine Loick, L. M. Cardenas, João Coutinho, H. Trindade, D. Fangueiro. Nitrogen dynamics in soils amended with slurry treated by acid or DMPP addition. Biology and Fertility of Soils. 2017; 53 (3):339-347.

Chicago/Turabian Style

M.Y Owusu-Twum; Nadine Loick; L. M. Cardenas; João Coutinho; H. Trindade; D. Fangueiro. 2017. "Nitrogen dynamics in soils amended with slurry treated by acid or DMPP addition." Biology and Fertility of Soils 53, no. 3: 339-347.

Journal article
Published: 01 February 2017 in Atmospheric Environment
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ACS Style

David Fangueiro; Daniel Becerra; Angel Albarran; David Peña; Javier Sanchez-Llerena; José Rato Nunes; Antonio López-Piñeiro. Effect of tillage and water management on GHG emissions from Mediterranean rice growing ecosystems. Atmospheric Environment 2017, 150, 303 -312.

AMA Style

David Fangueiro, Daniel Becerra, Angel Albarran, David Peña, Javier Sanchez-Llerena, José Rato Nunes, Antonio López-Piñeiro. Effect of tillage and water management on GHG emissions from Mediterranean rice growing ecosystems. Atmospheric Environment. 2017; 150 ():303-312.

Chicago/Turabian Style

David Fangueiro; Daniel Becerra; Angel Albarran; David Peña; Javier Sanchez-Llerena; José Rato Nunes; Antonio López-Piñeiro. 2017. "Effect of tillage and water management on GHG emissions from Mediterranean rice growing ecosystems." Atmospheric Environment 150, no. : 303-312.