Organic carbon stock changes and crop yield in a tropical sandy soil under rainfed grains-cotton farming systems in Bahia, Brazil

Authors

  • Alexandre Cunha de Barcellos Ferreira
  • Julio Cesar Bogiani
  • Valdinei Sofiatti
  • Ana Luiza Dias Coelho Borin
  • Fabiano José Perina
  • Gilvan Barbosa Ferreira
  • Mellissa Ananias Soler da Silva
  • Pedro Luiz Oliveira de Almeida Machado

Abstract

Most studies about soil organic carbon stock changes in the Cerrado (Brazilian Savanna) biome are either related to field data collected in clayey Ferralsols or different land uses, as if they were in equilibrium. This study aimed to evaluate the effect of tillage systems and crop sequences on the soil organic carbon stock and crop yield, in a sandy Ferralsol from Bahia, Brazil. The experimental design was randomized blocks, with four replicates. Soil samples were collected after five years of cotton, soybean and maize monocropping under heavy disk harrow and leveling harrow (conventional tillage), and of crop rotation of cotton, soybean and maize with green manure or cover crop (no-tillage). Additional samples were collected from a non-cultivated site (Neotropical Savanna, Cerrado sensu stricto). Soil conservation practices such as no-tillage and crop rotation with cover crop and green manure favored the soil organic carbon stock at the 0-40 cm layer, with the highest values reaching 36.03 Mg ha-1. The accrued soil carbon stock under conventional tillage and monoculture of cotton, maize and soybean was lower than under no-tillage, which ranged from 30.9 to 54.9 %, with the soil organic carbon stock increasing at the annual rate of 2.36 Mg ha-1 during five years. The no-tillage, with the soybean-maize-cotton rotation, in combination with cover crop and green manure, increased the cotton and soybean yields, with a simultaneous organic carbon accumulation in the sandy soil.

KEYWORDS: Gossypium hirsutum, soybean, maize, no-tillage, soil carbon accrual.

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Author Biography

Alexandre Cunha de Barcellos Ferreira

Agrônomo formado pela Universidade Federal de Viçosa - UFV (1994), com mestrado em Fitotecnia pela UFV (1996) e doutorado em Fitotecnia (Produção Vegetal) pela UFV (2001). Foi pesquisador da Empresa de Pesquisa Agropecuária de Minas Gerais - Epamig, de 1998 a junho de 2004. Desde julho de 2004 é pesquisador da Empresa Brasileira de Pesquisa Agropecuária - EMBRAPA ALGODÃO. Atua no cerrado brasileiro, principalmente, nas seguintes linhas temáticas de pesquisa na cultura do algodoeiro: sistema de produção, manejo do solo, matologia, manejo e tratos culturais, fitotecnia, fertilidade do solo e nutrição mineral.

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Published

2022-06-13

How to Cite

FERREIRA, A. C. de B.; BOGIANI, J. C. .; SOFIATTI, V.; BORIN, A. L. D. C.; PERINA, F. J.; FERREIRA, G. B. .; SILVA, M. A. S. da .; MACHADO, P. L. O. de A. . Organic carbon stock changes and crop yield in a tropical sandy soil under rainfed grains-cotton farming systems in Bahia, Brazil. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], Goiânia, v. 52, p. e71219, 2022. Disponível em: https://revistas.ufg.br/pat/article/view/71219. Acesso em: 22 dec. 2024.

Issue

Vol. 52 (2022)

Section

Special Supplement: Climate Change in Agriculture

License

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