Stock of Carbon and Soil Organic Fractions in No-Tillage and Crop–Livestock Integration Systems

Camila dos Santos Ferreira (), Rose Luiza Moraes Tavares (), Silvio Vasconcelos de Paiva Filho, Veridiana Cardozo Gonçalves Cantão, Gustavo André Simon, José Milton Alves, Hemython Luis Bandeira do Nascimento and Ubirajara Oliveira Bilego
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Camila dos Santos Ferreira: Postgraduate Program in Plant Production, Universidade de Rio Verde, Rio Verde 75901-970, GO, Brazil
Rose Luiza Moraes Tavares: Postgraduate Program in Plant Production, Universidade de Rio Verde, Rio Verde 75901-970, GO, Brazil
Silvio Vasconcelos de Paiva Filho: Postgraduate Program in Plant Production, Universidade de Rio Verde, Rio Verde 75901-970, GO, Brazil
Veridiana Cardozo Gonçalves Cantão: Postgraduate Program in Plant Production, Universidade de Rio Verde, Rio Verde 75901-970, GO, Brazil
Gustavo André Simon: Postgraduate Program in Plant Production, Universidade de Rio Verde, Rio Verde 75901-970, GO, Brazil
José Milton Alves: Instituto Federal de Educação, Ciência e Tecnologia de Goiás, Rio Verde 75901-970, GO, Brazil
Hemython Luis Bandeira do Nascimento: Centro Tecnológico, Cooperativa Agroindustrial dos Produtores Rurais do Sudoeste Goiano, Rio Verde 75913-899, GO, Brazil
Ubirajara Oliveira Bilego: Centro Tecnológico, Cooperativa Agroindustrial dos Produtores Rurais do Sudoeste Goiano, Rio Verde 75913-899, GO, Brazil

Sustainability, 2024, vol. 16, issue 7, 1-13

Abstract: Soil use and management practices influence the quantity and quality of soil organic matter (SOM). From this perspective, the objective of this work was to evaluate the carbon stock and SOM fractions in a no-tillage (NT) and crop–livestock integration (CL) system in the Cerrado biome. The treatments were divided into four areas, subdivided into an area under NT with 11 years of cultivation, two areas under CL with 5 or 10 years of cultivation, and an area of native vegetation (NV). Undisturbed and disturbed soil (Ferralsols) samples were collected in layers 0.0–0.1, 0.1–0.2, 0.2–0.4, and 0.4–0.6 m for the evaluations of soil properties, including bulk density, weighted mean diameter, clay content, carbon stock, carbon stock of light and mineral fractions, humification rate, and carbon management index. The results obtained suggest that the environments with the highest conservation of the physical properties of the soil are those that contain the highest levels of stable C. The main mechanism for C protection in the systems evaluated was mainly associated with physical protection, promoted by soil aggregates, capable of keeping C protected, and mitigation of C into the atmosphere. The values of the carbon management index in the agriculture areas were >100, indicating that these production systems could approach the soil quality of the native vegetation reference system.

Keywords: carbon management; light fraction; mineral fraction; humification rate (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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