This page has only limited features, please log in for full access.

Ms. Cecilia Loza
Kiel University

Basic Info


Research Keywords & Expertise

0 climate smart agriculture
0 Grazing systems
0 Plant Secondary metabolites
0 methane emissions
0 dairy systems

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

Doctoral candidate in Agricultural Science in the Grass and Forge Science / Organic Agriculture group, at Kiel University (Germany). Master’s degree in Agricultural Science (option Animal Science) from Universidad de la República (Uruguay) in 2018. Research interests include climate smart agriculture, sustainable grazing dairy systems and enteric methane mitigation strategies.

Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Conference
Nairobi, Kenya
Date: 23-29 October 2021
Will be a speaker at the conference:
Profile Image
Cecilia Loza
Original research article
Published: 26 May 2021 in Frontiers in Sustainable Food Systems
Reads 0
Downloads 0

Intensive confinement (IC) systems for dairying have become widespread during the last decades. However, potential advantages of alternative systems such as full-grazing (FG) or integrated dairy/cash-crop (IFG) systems with regards to better provision of ecosystem services are widely discussed. To investigate performance and environmental impacts, we compared four prevailing dairy systems using an on-farm research study. The farm types differed in their share of pasture access and quantity of resource inputs: (i) an IC with a high import of supplements and mineral fertilizers; (ii) a semi-confinement (SC) with daytime pasture access during summer and moderate import of supplementary feeds representing the base-line scenario; (iii) a FG based on grazed seeded grass-clover swards with no purchased N-fertilizers and low quantities of supplementary feeds; and (iv) an IFG comparable to FG but based on grass-clover leys integrated in a cash-crop rotation. Results revealed highest milk productivity (16 t energy-corrected-milk (ECM) ha−1) and farm-N-balance (230 kg N ha−1) in IC; however, the highest product carbon footprint (PCF; 1.2 CO2eq kg ECM−1) and highest N-footprint (13 g N kg ECM−1) were found in the baseline system SC. The FG and IFG revealed on average similar forage dry matter yields (10 – 11 t DM ha−1) at similar crude protein and net-energy-lactation ratios per kg DM-intake compared to the IC and SC. The PCF in FG were comparable to IC (0.9 vs. 1.1 kg CO2eq kg ECM−1) but at a lower N-footprint (9 vs. 12 g N kg ECM−1). However, despite low measured N-losses in the FG system, the farm-N-surplus was exceeded by 90 kg N ha−1. A further reduction was only possible in the IFG (50 kg N ha−1) by accounting for a potential N-carry-over from N-rich plant residues to the cash-crop unit, leading to the lowest PCF (0.6 kg CO2eq kg ECM−1) for the IFG, with still moderate milk yield levels (~10,500 kg ECM ha−1). According to this bottom-up approach based on field data, improved integrated grazing systems could provide an important opportunity to increase the ecosystem services from dairy farming, operating with land use efficiencies similar to IC.

ACS Style

Thorsten Reinsch; Cecilia Loza; Carsten Stefan Malisch; Iris Vogeler; Christof Kluß; Ralf Loges; Friedhelm Taube. Toward Specialized or Integrated Systems in Northwest Europe: On-Farm Eco-Efficiency of Dairy Farming in Germany. Frontiers in Sustainable Food Systems 2021, 5, 1 .

AMA Style

Thorsten Reinsch, Cecilia Loza, Carsten Stefan Malisch, Iris Vogeler, Christof Kluß, Ralf Loges, Friedhelm Taube. Toward Specialized or Integrated Systems in Northwest Europe: On-Farm Eco-Efficiency of Dairy Farming in Germany. Frontiers in Sustainable Food Systems. 2021; 5 ():1.

Chicago/Turabian Style

Thorsten Reinsch; Cecilia Loza; Carsten Stefan Malisch; Iris Vogeler; Christof Kluß; Ralf Loges; Friedhelm Taube. 2021. "Toward Specialized or Integrated Systems in Northwest Europe: On-Farm Eco-Efficiency of Dairy Farming in Germany." Frontiers in Sustainable Food Systems 5, no. : 1.

Journal article
Published: 14 April 2021 in Animals
Reads 0
Downloads 0

Methane emissions from ruminants are a major contributor to agricultural greenhouse gas emissions. Thus, eight different forage species were combined in binary mixtures with Lolium perenne in increasing proportions, in vitro, to determine their methane reduction potential in ruminants. Species were sampled in two consecutive years where possible. The aims were: a) to determine if mixtures with specific forages, particularly those rich in plant specialized metabolites (PSM), can reduce methane emissions compared to ryegrass monocultures, b) to identify whether there is a linear-dose effect relationship in methane emissions from the legume or herb addition, and c) whether these effects are maintained across sampling years. Results showed that all dicot species studied, including the non-tannin-containing species, reduced methane production. The tannin-rich species, Sanguisorba minor and Lotus pedunculatus, showed the greatest methane reduction potential of up to 33%. Due to concomitant reductions in the forage digestibility, Cichorium intybus yielded the lowest methane emissions per digestible forage unit. Contrary to total gas production, methane production was less predictable, with a tendency for the lowest methane production being obtained with a 67.5% share of the legume or herb partner species. Thus, linear increments in the partner species share did not result in linear changes in methane concentration. The methane reduction potential differed across sampling years, but the species ranking in methane concentration was stable.

ACS Style

Cecilia Loza; Supriya Verma; Siegfried Wolffram; Andreas Susenbeth; Ralf Blank; Friedhelm Taube; Ralf Loges; Mario Hasler; Christof Kluß; Carsten Malisch. Assessing the Potential of Diverse Forage Mixtures to Reduce Enteric Methane Emissions In Vitro. Animals 2021, 11, 1126 .

AMA Style

Cecilia Loza, Supriya Verma, Siegfried Wolffram, Andreas Susenbeth, Ralf Blank, Friedhelm Taube, Ralf Loges, Mario Hasler, Christof Kluß, Carsten Malisch. Assessing the Potential of Diverse Forage Mixtures to Reduce Enteric Methane Emissions In Vitro. Animals. 2021; 11 (4):1126.

Chicago/Turabian Style

Cecilia Loza; Supriya Verma; Siegfried Wolffram; Andreas Susenbeth; Ralf Blank; Friedhelm Taube; Ralf Loges; Mario Hasler; Christof Kluß; Carsten Malisch. 2021. "Assessing the Potential of Diverse Forage Mixtures to Reduce Enteric Methane Emissions In Vitro." Animals 11, no. 4: 1126.

Journal article
Published: 19 March 2021 in Animals
Reads 0
Downloads 0

The aim of this study was to measure methane emissions (CH4) and herbage intake, and, on the basis of these results, obtain the methane yield (MY, methane yield as g CH4/kg dry matter intake (DMI) and Ym, methane yield as a percentage of Gross Energy intake), from beef cows grazing on native grasslands. We used forty pregnant heifers, with two treatments of herbage allowance (HA) adjusted seasonally (8 and 5 kg dry matter (DM)/kg cattle live weight (LW), on average), during autumn, winter and spring. Methane emissions (207 g CH4/d), organic matter intake (OMI, 7.7 kg organic matter (OM)/d), MY (23.6 g CH4/kg DMI) and Ym (7.4%), were similar between treatments. On the other hand, all variables had a marked increase in spring (10.8 kg OM/d and 312 g CH4/d), except for Ym. The methane emission factor from Intergovernmental Panel on Climate Change (IPCC) Tier 2 estimated with these results was 78 kg CH4/head/year. The results show that methane emissions and intake were influenced by the season, but not by the HA analyzed in this study. This information for cow–calf systems in native grasslands in Uruguay can be used in National greenhouse gases (GHG) inventories, representing a relevant contribution to global GHG inventories.

ACS Style

M. Orcasberro; Cecilia Loza; José Gere; Pablo Soca; Valentín Picasso; Laura Astigarraga. Seasonal Effect on Feed Intake and Methane Emissions of Cow–Calf Systems on Native Grassland with Variable Herbage Allowance. Animals 2021, 11, 882 .

AMA Style

M. Orcasberro, Cecilia Loza, José Gere, Pablo Soca, Valentín Picasso, Laura Astigarraga. Seasonal Effect on Feed Intake and Methane Emissions of Cow–Calf Systems on Native Grassland with Variable Herbage Allowance. Animals. 2021; 11 (3):882.

Chicago/Turabian Style

M. Orcasberro; Cecilia Loza; José Gere; Pablo Soca; Valentín Picasso; Laura Astigarraga. 2021. "Seasonal Effect on Feed Intake and Methane Emissions of Cow–Calf Systems on Native Grassland with Variable Herbage Allowance." Animals 11, no. 3: 882.

Journal article
Published: 20 February 2021 in Agriculture
Reads 0
Downloads 0

Methane is a major constituent of greenhouse gas (GHG) emissions from ruminants, and mitigation strategies are needed to alleviate this negative environmental impact while maintaining the environmental and other benefits of grazing systems. Forages containing plant-specialized metabolites (PSM), particularly condensed tannins, may help reduce enteric methane (CH4) emissions. However, information on in vivo CH4 emissions from cows grazing mixtures that contain bioactive herbs is scarce. Accordingly, this study compared a binary mixture of perennial ryegrass (Lolium perenne) and white clover (Trifolium repens) against a diverse mixture of six additional species, including tannin-rich species like birdsfoot trefoil (Lotus corniculatus) and salad burnet (Sanguisorba minor), in a full-grazing dairy system. Enteric CH4 emissions were measured using the SF6 tracer technique. Cows grazing diverse mixtures increased their energy-corrected milk (ECM) yield by 4% (p < 0.001) compared with binary mixtures. However, CH4 emissions per kg ECM were also 11% greater for the diverse mixtures (p < 0.05). The very high feed quality and milk yield from both mixtures explained the low CH4 emissions recorded relative to the milk output. The addition of forbs did not provide additional benefits at these intensities, as they were maintained in low yield shares throughout.

ACS Style

Cecilia Loza; Thorsten Reinsch; Ralf Loges; Friedhelm Taube; José Gere; Christof Kluß; Mario Hasler; Carsten Malisch. Methane Emission and Milk Production from Jersey Cows Grazing Perennial Ryegrass–White Clover and Multispecies Forage Mixtures. Agriculture 2021, 11, 175 .

AMA Style

Cecilia Loza, Thorsten Reinsch, Ralf Loges, Friedhelm Taube, José Gere, Christof Kluß, Mario Hasler, Carsten Malisch. Methane Emission and Milk Production from Jersey Cows Grazing Perennial Ryegrass–White Clover and Multispecies Forage Mixtures. Agriculture. 2021; 11 (2):175.

Chicago/Turabian Style

Cecilia Loza; Thorsten Reinsch; Ralf Loges; Friedhelm Taube; José Gere; Christof Kluß; Mario Hasler; Carsten Malisch. 2021. "Methane Emission and Milk Production from Jersey Cows Grazing Perennial Ryegrass–White Clover and Multispecies Forage Mixtures." Agriculture 11, no. 2: 175.

Journal article
Published: 15 November 2020 in Livestock Science
Reads 0
Downloads 0

Feed additives, chemical inhibitors, and biological approaches have been studied and used to inhibit production of enteric methane (CH4) in ruminants by modifying methanogenic bacterial communities. However, information on the potential of micromineral supplements in this regard is limited. The objective of this study was to evaluate the effect of 20 mg (control) and 40 mg Cu (from supplemental CuSO4)/kg dietary dry matter (DM) on nutrient digestion, ruminal fermentation characteristics, and enteric CH4 emissions measured with the tracing technique of sulfur hexafluoride. Six Holstein bulls were divided into two groups of three animals and assigned to one of two experimental diets in a crossover design. Percentages of apparent digestibility of DM, neutral detergent fiber, and N did not differ (P>0.05) between treatments. Supplemental Cu decreased (P0.05) between treatments in ruminal fluid pH or, acetate:propionate ratio. Emission of CH4 tended (P<0.1) to decrease by 23% with supplemental Cu. This study showed that 40 mg Cu/kg dietary DM is a feasible dietary level in cattle, because supplemental Cu from CuSO4 did not impair nutrient digestibility and tended to decrease enteric CH4 emissions.

ACS Style

Victor H. Sánchez-Sánchez; Vinisa Saynes-Santillan; José I. Gere; Rosy G. Cruz-Monterrosa; Guillermo Jiménez-Ferrer; Laura Astigarraga; Cecilia Loza; Juliana Padilla; J. Efrén Ramírez-Bribiesca. Influence of supplemental dietary copper in high roughage rations on nutrient digestibility and methane emission in Holstein bulls. Livestock Science 2020, 244, 104347 .

AMA Style

Victor H. Sánchez-Sánchez, Vinisa Saynes-Santillan, José I. Gere, Rosy G. Cruz-Monterrosa, Guillermo Jiménez-Ferrer, Laura Astigarraga, Cecilia Loza, Juliana Padilla, J. Efrén Ramírez-Bribiesca. Influence of supplemental dietary copper in high roughage rations on nutrient digestibility and methane emission in Holstein bulls. Livestock Science. 2020; 244 ():104347.

Chicago/Turabian Style

Victor H. Sánchez-Sánchez; Vinisa Saynes-Santillan; José I. Gere; Rosy G. Cruz-Monterrosa; Guillermo Jiménez-Ferrer; Laura Astigarraga; Cecilia Loza; Juliana Padilla; J. Efrén Ramírez-Bribiesca. 2020. "Influence of supplemental dietary copper in high roughage rations on nutrient digestibility and methane emission in Holstein bulls." Livestock Science 244, no. : 104347.