Effects of companion crops and tillage on soil phosphorus in a Brazilian oxisol: a chemical and 31P NMR spectroscopy study

Autor: Diogo Néia Eberhardt, Thierry Becquer, Christine Le Guernevé, Herve Quiquampoix, Robélio Leandro Marchão, Volaniaina H. Ramaroson, Marie Sauvadet, Takashi Muraoka
Přispěvatelé: University of São Paulo (USP), EMBRAPA Cerrados, Brazilian Agricultural Research Corporation (Embrapa), Ecologie fonctionnelle et biogéochimie des sols et des agro-écosystèmes (UMR Eco&Sols), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Sciences Pour l'Oenologie (SPO), Université de Montpellier (UM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), University of Antananarivo, Fonctionnement écologique et gestion durable des agrosystèmes bananiers et ananas (UR GECO), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Département Performances des systèmes de production et de transformation tropicaux (Cirad-PERSYST), USP/Cofecub program (129/11), University of Sao Paulo, Brazil, Comite Francais d'Evaluation de la Cooperation Universitaire et Scientifique avec le Bresil, France, CAPES, National Council for Scientific and Technological Development (CNPq)
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Brachiaria ruziziensis
amélioration des cultures
F08 - Systèmes et modes de culture
Travail du sol
Stratigraphy
Organic phosphorus
Spectroscopie
Plante de culture associée
010501 environmental sciences
01 natural sciences
F01 - Culture des plantes
F07 - Façons culturales
Augmentation de rendement
2. Zero hunger
chemistry.chemical_classification
biology
Cover crops
food and beverages
04 agricultural and veterinary sciences
Tillage
Rendement des cultures
Agroécosystème
Oxisol
agriculture de conservation
Culture associée
Ferralsol
Conservation agriculture
P-31 NMR
chemistry.chemical_element
Zea mays
phosphorus content [EN]
Organic matter
0105 earth and related environmental sciences
Earth-Surface Processes
Phosphorus cycling
Phosphorus
Soil organic matter
fungi
Mineralization (soil science)
15. Life on land
biology.organism_classification
Manure
F61 - Physiologie végétale - Nutrition
Agronomy
chemistry
040103 agronomy & agriculture
0401 agriculture
forestry
and fisheries
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
Cajanus cajan
Zdroj: Journal of Soils and Sediments
Journal of Soils and Sediments, Springer Verlag, 2021, 21 (2), pp.1024-1037. ⟨10.1007/s11368-020-02817-7⟩
ISSN: 1439-0108
1614-7480
Popis: International audience; Purpose Phosphorus (P) is often the main limiting factor for plant growth in highly weathered tropical soils. Phosphate use efficiency and crop yields could be increased in low-input agroecosystems through cropping systems that favor organic matter accumulation or regular additions of composts and manure. Our objective was to determine the amounts and forms of P according to companion crops (Brachiaria ruziziensis-a grass species-or Cajanus cajan-a leguminous species) and tillage systems (conventional or no-tillage). Materials and methods Soil P pools were determined (P-resin, P-Olsen, PNaOH-EDTA, and P-total) and P species were characterized by P-31 NMR spectroscopy. Results and discussion The concentrations of available and labile inorganic P (P-resin, Pi(Olsen), and Pi(NaOH-EDTA)) were greater in soil samples where companion crops (Brachiaria ruziziensis or Cajanus cajan) and maize were planted on the same row, with a more significant effect with the legume species. According to the P-31 NMR, it is mostly the proportion and amount of P-Orthophosphate that was increased, with a slight increase of the content of P-Monoester. Overall, there was a decrease of the proportion of organic P (Po-NMR/P-NMR) from 32 to 16% when the legume companion crop was associated with maize. Conclusions The tillage systems did not lead to any change in the amounts and forms of P. Companion crops are thought to increase available P through mineralization of Po from plant residues and soil organic matter, leading to an increase of fluxes between active P pools.
Databáze: OpenAIRE
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