Accumulated Carbon Fractions in Tropical Sandy Soils and Their Effects on Fertility and Grain Yield in an Integrated Crop–Livestock System
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Le résumé fourni par la source
Food production in sandy soils has evolved significantly, most notably through the advent of integrated crop–livestock systems (ICLSs). ICLSs increase soil cover, which maintains soil moisture and sequesters carbon (C). Here we investigate the influence of ICLSs on soil physical, chemical, and biochemical properties, and grain yield (GY) in tropical sandy soils in short-time. We compared seven ICLSs in two consecutive crops seasons (with soybean or maize as cash crops) in southeastern Brazil. These were (1) corn + Urochloa brizantha cv. BRS Paiaguás—soybean (ICL-Paiaguás); (2) corn + U. brizantha cv. BRS Piatã—soybean; (3) corn + U. ruziziensis—soybean; (4) corn–soybean under conventional tillage (CT) as a negative control; (5) corn–soybean under no-tillage (NT) as a positive control; (6) Paiaguás grass—continuous grazing (Perennial Paiaguás); (7) and Piatã grass—continuous grazing (Perennial Piatã). Soybean and corn GY data, soil physical and chemical attributes, and soil enzymatic activity were subjected to descriptive statistics and multivariate analysis. CT and NT shared high loadings of H + Al, Al, and soil temperature and low loadings of soil pH, SOM physical and chemical fractions, cationic exchange capacity, and arylsulfatase activity. ICL-Paiaguás and Perennial Piatã had a similarly high loading of total N, humin, total organic carbon, and mineral-associated carbon stocks. The fulvic acid fraction was the most sensitive to C accumulation in the sandy soil under ICLSs. Soil water and thermal regimes were limiting in both CT and NT. The study not only confirms the capacity of conservation mechanisms to enhance soil-based ecosystem functions, but it also highlights the potential of ICLSs to aid sustainable food production even in the context of tropical sandy soils, which frequently receive limited attention in intensive agricultural practices.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Accumulated Carbon Fractions in Tropical Sandy Soils and Their Effects on Fertility and Grain Yield in an Integrated Crop–Livestock System
- Date Crossref
- 16/09/2023
- Éditeur
- MDPI AG
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Universidade de São Paulo pays non établi dans la noticeUniversité ou école supérieure
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Forest Science and Research Institute pays non établi dans la noticeOrganisation à but non lucratif
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Universidade Estadual Paulista (Unesp) pays non établi dans la noticeUniversité ou école supérieure
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Agência Paulista de Tecnologia dos Agronegócios pays non établi dans la noticeOrganisme public
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Brazilian Agricultural Research Corporation pays non établi dans la noticeOrganisme public
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Luiz de Queiroz College of Agriculture Department of Soil Science pays non établi dans la noticeUniversité ou école supérieure
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College of Agronomic and Technological Sciences pays non établi dans la noticeUniversité ou école supérieure
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Sao Paulo State University “Julio de Mesquita Filho” Department of Plant Health pays non établi dans la noticeUniversité ou école supérieure
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Sao Paulo State University "Julio de Mesquita Filho" Department of Plant Health pays non établi dans la noticeUniversité ou école supérieure
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São Paulo Agency of Agribusiness Technology (APTA) pays non établi dans la noticeOrganisme public
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Embrapa Cerrados pays non établi dans la noticeInstitution
Universidade de São Paulo, Forest Science and Research Institute et Universidade Estadual Paulista (Unesp), avec 8 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.