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Cécile Nobile
AGHYLE, UP 2018.C101, SFR Condorcet FR CNRS 3417, UniLaSalle, Beauvais, France

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Regular article
Published: 03 June 2020 in Plant and Soil
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Plant P acquisition strategies are driven by multiple belowground morphological and physiological traits as well as interactions among these traits. This study aimed to characterize the relationships among traits involved in P acquisition to explore tradeoffs and the main P-acquisition strategies and their mediation by soil type. Ten morphological and physiological traits involved in P acquisition were measured across 13 species grown in controlled conditions in two contrasting soils with moderate P limitation. Tradeoffs between thicker and thinner roots were observed, with thicker roots exhibiting greater carboxylate release or phosphatase activity in the rhizosheath. Tradeoffs and coordination amongst traits were strongly mediated by soil type. Multivariate analysis of functional traits involved in P acquisition highlighted four main P-acquisition strategies relying primarily on morphological traits, physiological traits or a combination thereof. The diversity of strategies demonstrates a potential for functional diversity benefits in cultivated plant communities via preferential access to different P pools leading to complementarities and reduced competition for resource acquisition. Overall, our results underpin functionally-complementary multispecies crop designs, enhancing P availability and cycling efficiency.

ACS Style

Nicolas Honvault; David Houben; Cécile Nobile; Stéphane Firmin; Hans Lambers; Michel-Pierre Faucon. Tradeoffs among phosphorus-acquisition root traits of crop species for agroecological intensification. Plant and Soil 2020, 461, 137 -150.

AMA Style

Nicolas Honvault, David Houben, Cécile Nobile, Stéphane Firmin, Hans Lambers, Michel-Pierre Faucon. Tradeoffs among phosphorus-acquisition root traits of crop species for agroecological intensification. Plant and Soil. 2020; 461 (1-2):137-150.

Chicago/Turabian Style

Nicolas Honvault; David Houben; Cécile Nobile; Stéphane Firmin; Hans Lambers; Michel-Pierre Faucon. 2020. "Tradeoffs among phosphorus-acquisition root traits of crop species for agroecological intensification." Plant and Soil 461, no. 1-2: 137-150.

Journal article
Published: 12 March 2020 in Sustainability
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Struvite is increasingly considered a promising alternative to mined phosphorus (P) fertilizer. However, its solubility is very low under neutral to alkaline pH while it increases with acidification. Here, we investigated whether supplying ammonium to stimulate rhizosphere acidification might improve struvite solubility at the vicinity of roots and, ultimately, enhance P uptake by plants. Using a RHIZOtest design, we studied changes in soil pH, P availability and P uptake by ryegrass in the rhizosphere and bulk soil supplied with either ammonium or nitrate under three P treatments: no-P, triple super phosphate and struvite. We found that supplying ammonium decreased rhizosphere pH by more than three units, which in turn increased soluble P concentrations by three times compared with nitrate treatments. However, there was no difference between P treatments, which was attributed to the increase of soluble Al concentration in the rhizosphere, which subsequently controlled P availability by precipitating it under the form of variscite-like minerals (predicted using Visual MINTEQ). Moreover, although ammonium supply increased soluble P concentration, it did not improve P uptake by plants, likely due to the absence of P deficiency. Further studies, especially in low-P soils, are thus needed to elucidate the role of nitrogen form on P uptake in the presence of struvite. More generally, our results highlight the complexity of manipulating rhizosphere processes and stress the need to consider all the components of the soil-plant system.

ACS Style

Andrea Danaé Gómez-Suárez; Cécile Nobile; Michel-Pierre Faucon; Olivier Pourret; David Houben. Fertilizer Potential of Struvite as Affected by Nitrogen Form in the Rhizosphere. Sustainability 2020, 12, 2212 .

AMA Style

Andrea Danaé Gómez-Suárez, Cécile Nobile, Michel-Pierre Faucon, Olivier Pourret, David Houben. Fertilizer Potential of Struvite as Affected by Nitrogen Form in the Rhizosphere. Sustainability. 2020; 12 (6):2212.

Chicago/Turabian Style

Andrea Danaé Gómez-Suárez; Cécile Nobile; Michel-Pierre Faucon; Olivier Pourret; David Houben. 2020. "Fertilizer Potential of Struvite as Affected by Nitrogen Form in the Rhizosphere." Sustainability 12, no. 6: 2212.

Short communication
Published: 10 November 2019 in Scientia Horticulturae
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The use of biochar as an additive for growing media for the production of potted plants requires a sound knowledge of how its properties impact plant biomass production. This study aims at linking physical and chemical properties of biochar with horticultural crop biomass. For this purpose, we incorporated six different biochars into growing medium and grew basil (Ocimum basilicum L.), lettuce (Lactuca sativa L. var. crispa) and pansy (Viola wittrockiana Gams.) for one month in greenhouse conditions. We found that physical and chemical properties of biochars had a significant impact on plant growth. Biochars with low density and high porosity promoted the biomass of basil and lettuce. While nutrient concentration in biochars had no impact on plant growth, lettuce and pansy biomasses decreased with increasing biochar pH and basil biomass decreased with increasing biochar electrical conductivity. By identifying which biochar properties influence plant biomass, our study allows selection of the biochars which are the best suited for incorporation into growing media.

ACS Style

Cécile Nobile; Julia Denier; David Houben. Linking biochar properties to biomass of basil, lettuce and pansy cultivated in growing media. Scientia Horticulturae 2019, 261, 109001 .

AMA Style

Cécile Nobile, Julia Denier, David Houben. Linking biochar properties to biomass of basil, lettuce and pansy cultivated in growing media. Scientia Horticulturae. 2019; 261 ():109001.

Chicago/Turabian Style

Cécile Nobile; Julia Denier; David Houben. 2019. "Linking biochar properties to biomass of basil, lettuce and pansy cultivated in growing media." Scientia Horticulturae 261, no. : 109001.

Journal article
Published: 16 October 2019 in Scientific Reports
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Crops have different strategies to acquire poorly-available soil phosphorus (P) which are dependent on their architectural, morphological, and physiological root traits, but their capacity to enhance P acquisition varies with the type of fertilizer applied. The objective of this study was to examine how P-acquisition strategies of three main crops are affected by the application of sewage sludges, compared with a mineral P fertilizer. We carried out a 3-months greenhouse pot experiment and compared the response of P-acquisition traits among wheat, barley and canola in a soil amended with three sludges or a mineral P fertilizer. Results showed that the P-acquisition strategy differed among crops. Compared with canola, wheat and barley had a higher specific root length and a greater root carboxylate release and they acquired as much P from sludge as from mineral P. By contrast, canola shoot P content was greater with sludge than with mineral P. This was attributed to a higher root-released acid phosphatase activity which promoted the mineralization of sludge-derived P-organic. This study showed that contrasted P-acquisition strategies of crops allows increased use of renewable P resources by optimizing combinations of crop and the type of P fertilizer applied within the cropping system.

ACS Style

C. Nobile; D. Houben; E. Michel; S. Firmin; Hans Lambers; E. Kandeler; Michel-Pierre Faucon. Phosphorus-acquisition strategies of canola, wheat and barley in soil amended with sewage sludges. Scientific Reports 2019, 9, 1 -11.

AMA Style

C. Nobile, D. Houben, E. Michel, S. Firmin, Hans Lambers, E. Kandeler, Michel-Pierre Faucon. Phosphorus-acquisition strategies of canola, wheat and barley in soil amended with sewage sludges. Scientific Reports. 2019; 9 (1):1-11.

Chicago/Turabian Style

C. Nobile; D. Houben; E. Michel; S. Firmin; Hans Lambers; E. Kandeler; Michel-Pierre Faucon. 2019. "Phosphorus-acquisition strategies of canola, wheat and barley in soil amended with sewage sludges." Scientific Reports 9, no. 1: 1-11.

Journal article
Published: 31 August 2019 in Chemosphere
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The effect of organic fertilizers on soil phosphorus (P) availability is usually mainly associated with the rate and forms of P applied, while they also alter the soil physical-chemical properties, able to change P availability. We aimed to highlight the impact of pH and organic C modifications in soil on the inorganic P (Pi) sorption capacity and availability as compared to the effect of P accumulation after mineral or organic fertilizers. We conducted a 10-years-old field experiment on an andosol and compared fields that had been amended with mineral or organic (dairy slurry and manure compost) fertilizers against a non-fertilized control. Water and Olsen extractions and Pi sorption experiments were realized on soils sampled after 6 and 10 years of trial. We also realized an artificial and ex situ alkalization of the control soil to isolate the effect of pH on Pi sorption capacity. Organic fertilizer application increased total P, pH, and organic C in soil. Pi-Olsen increased mainly with soil total P (r2 adj = 0.79), while Pi-water increased jointly with soil total P and pH (r2 adj = 0.85). The Pi sorption capacity decreased with organic fertilizer application. Artificial and ex situ alkalization of the control soil showed that Pi sorption capacity decreased with increasing pH. Our study demonstrated that, beyond the P fertilization rate, the increase in organic C content and even more so in pH induced by a decade of organic fertilizer applications in soil decreased the Pi sorption capacity and consequently increased Pi-water in soil.

ACS Style

C.M. Nobile; M.N. Bravin; T. Becquer; J.-M. Paillat. Phosphorus sorption and availability in an andosol after a decade of organic or mineral fertilizer applications: Importance of pH and organic carbon modifications in soil as compared to phosphorus accumulation. Chemosphere 2019, 239, 124709 .

AMA Style

C.M. Nobile, M.N. Bravin, T. Becquer, J.-M. Paillat. Phosphorus sorption and availability in an andosol after a decade of organic or mineral fertilizer applications: Importance of pH and organic carbon modifications in soil as compared to phosphorus accumulation. Chemosphere. 2019; 239 ():124709.

Chicago/Turabian Style

C.M. Nobile; M.N. Bravin; T. Becquer; J.-M. Paillat. 2019. "Phosphorus sorption and availability in an andosol after a decade of organic or mineral fertilizer applications: Importance of pH and organic carbon modifications in soil as compared to phosphorus accumulation." Chemosphere 239, no. : 124709.

Journal article
Published: 26 February 2019 in Applied Soil Ecology
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Sewage sludge is a phosphorus (P) source alternative to P fertiliser derived from rock phosphate, but its impact on soil processes driving P cycling in agroecosystems requires further study. In order to optimise the use of sludge for sustainable P fertilisation, we need to elucidate the drivers of P dynamics. The present study aims at determining how different sludges (heated sludge, HS and composted sludge, CS) affect soil P pools and dynamics. A field experiment was established and soil was amended either with sludge or with inorganic P (triple superphosphate, TSP). Soil samples were collected five times during a vegetation period, and analysed for Hedley P fractions, microbial P and phosphatase activity. Phosphorus dynamics in soil was strongly influenced by P concentrations in sludge. About one year after application, sludge with the highest P concentration (HS) was as effective as TSP to improve soil P availability. The P source of TSP was immediately available for plant uptake, but the high phosphatase activity of the HS treatment evidenced that soil microorganisms released phosphatases which can hydrolyse HS-derived organic P compounds. In addition, the high content of microbial P in the HS treatment suggests that soil microorganisms assimilate P into their own biomass. By contrast, sludge with the lowest P concentration (CS) enriched primarily the weakly-soluble soil P fractions, resulting in lower P availability compared with that in the TSP treatment. Our findings suggest that both high P concentration and slow, but continuous microbial breakdown of organic P substrates derived from HS allow using this resource as an important source for plant mineral nutrition. This study stresses the need to both characterise P concentrations and P forms in sludge, prior to their application in the field.

ACS Style

David Houben; Etienne Michel; Cécile Nobile; Hans Lambers; Ellen Kandeler; Michel-Pierre Faucon. Response of phosphorus dynamics to sewage sludge application in an agroecosystem in northern France. Applied Soil Ecology 2019, 137, 178 -186.

AMA Style

David Houben, Etienne Michel, Cécile Nobile, Hans Lambers, Ellen Kandeler, Michel-Pierre Faucon. Response of phosphorus dynamics to sewage sludge application in an agroecosystem in northern France. Applied Soil Ecology. 2019; 137 ():178-186.

Chicago/Turabian Style

David Houben; Etienne Michel; Cécile Nobile; Hans Lambers; Ellen Kandeler; Michel-Pierre Faucon. 2019. "Response of phosphorus dynamics to sewage sludge application in an agroecosystem in northern France." Applied Soil Ecology 137, no. : 178-186.

Journal article
Published: 25 October 2018 in Soil Use and Management
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ACS Style

C. M. Nobile; M. N. Bravin; E. Tillard; T. Becquer; J.-M. Paillat. Phosphorus sorption capacity and availability along a toposequence of agricultural soils: effects of soil type and a decade of fertilizer applications. Soil Use and Management 2018, 34, 461 -471.

AMA Style

C. M. Nobile, M. N. Bravin, E. Tillard, T. Becquer, J.-M. Paillat. Phosphorus sorption capacity and availability along a toposequence of agricultural soils: effects of soil type and a decade of fertilizer applications. Soil Use and Management. 2018; 34 (4):461-471.

Chicago/Turabian Style

C. M. Nobile; M. N. Bravin; E. Tillard; T. Becquer; J.-M. Paillat. 2018. "Phosphorus sorption capacity and availability along a toposequence of agricultural soils: effects of soil type and a decade of fertilizer applications." Soil Use and Management 34, no. 4: 461-471.

Journal article
Published: 01 August 2018 in Science of The Total Environment
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At the time of spring pre-emergent herbicide application, the soil surface in conservation agriculture is most of the time covered by cover crops (CC) mulches. The state of these mulches depends on their destruction date and on the selected species. Sorption and degradation of C-S-metolachlor on and within 8 decaying CC-covered (2 species × 4 initial decomposition state) soils corresponding to conservation agriculture were compared to its fate in bare soil (BS) corresponding to conventional agriculture. C-S-metolachlor and its metabolites distribution between mineralized, extractable and non-extractable (NER) fractions was determined at 5 dates during a 20 °C/84-d period. Herbicide mineralization was weak (<2%) for both CC and BS. Extractability of C in BS was intermediate between CC that were decomposed 28 or 56 days and 0 or 6 days before application. Degradates consisted in up to 43% of total radioactivity, with specificities according to the CC or soil compartment. NER formation was equivalent in BS and in the much decomposed CC-amended microcosms, and was stronger in less decomposed CC. S-metolachlor DT was 23-d in BS, and 9, 15, 39 and 25-d for CC ordered by increased decomposition state at the time of application. These results were attributed to the proportion of C intercepted by CC, and to higher levels of organic matter and microbial activity in less decomposed CC as compared with more decomposed ones. Then the state of decomposition level of CC residues determines the behaviour of SMOC (S-metolachlor) sprayed on the mulch in the conditions of conservation agriculture.

ACS Style

A. Cassigneul; P. Benoit; Cécile Nobile; V. Bergheaud; V. Dumeny; V. Etiévant; A. Maylin; Eric Justes; L. Alletto. Behaviour of S-metolachlor and its oxanilic and ethanesulfonic acids metabolites under fresh vs. partially decomposed cover crop mulches: A laboratory study. Science of The Total Environment 2018, 631-632, 1515 -1524.

AMA Style

A. Cassigneul, P. Benoit, Cécile Nobile, V. Bergheaud, V. Dumeny, V. Etiévant, A. Maylin, Eric Justes, L. Alletto. Behaviour of S-metolachlor and its oxanilic and ethanesulfonic acids metabolites under fresh vs. partially decomposed cover crop mulches: A laboratory study. Science of The Total Environment. 2018; 631-632 ():1515-1524.

Chicago/Turabian Style

A. Cassigneul; P. Benoit; Cécile Nobile; V. Bergheaud; V. Dumeny; V. Etiévant; A. Maylin; Eric Justes; L. Alletto. 2018. "Behaviour of S-metolachlor and its oxanilic and ethanesulfonic acids metabolites under fresh vs. partially decomposed cover crop mulches: A laboratory study." Science of The Total Environment 631-632, no. : 1515-1524.