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Soybean off-season management practices: impacts on physical and chemical soil properties and crop yield

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Abstract

Off-season crops diversification and gypsum under minimal tillage can improve soil fertility and reduce soil compaction. The objective of this work was to evaluate changes on soil physical and chemical properties and soybean yield grown over off-season crops in combination with gypsum and chiseling. Treatments consisted of gypsum application (0 and 3,5 t ha-1), two tillage systems (no tillage [NT] and minimal tillage [MT] with chiseling) and four soybean off-season crop successions: maize (M); maize+brachiaria (M+B); millet+crotalaria/wheat (Mi+C/W) and maize+black oats (M+O). Gypsum application reduced resistance to penetration (PR) by 12% in M+B system (1.12 kPa), when compared to the same treatment without gypsum. Gypsum increased surface soil Ca contents, mainly in M/O (from 3.81 to 5.66 cmolc dm-3). MT decreased PR in M+B, Mi+C/W and M/O, from 1.28 kPa in NT to 0.98 kPa. MT lowered total soil porosity from 66.9 to 63.1%, but reduced Ca contents compared to NT. Cultivation of crotalaria in the off-season reduced Al levels on the soil surface and grasses increased K and P in depth. Despite the improvements in the soil properties, crop rotations, chiseling and gypsum were not able to increase soybean yields in this 18-month experiment, averaging 3904 kg ha-1.

Original languageEnglish
Article numbere70520
JournalRevista Ceres
Volume70
Issue number5
DOIs
StatePublished - 2023

Bibliographical note

Publisher Copyright:
© This is an open access article distributed under the terms of the Creative Commons Attribution License (CC-BY), which permits unrestricted use, distribution, and reproduction in any medium, as long as the original work is properly cited.

Funding

1 This publication was extracted from Cleonei Alievi bachelor graduation monograph. This work recieved financial support from Centro Universitário Fundação Assis Gurgacz. 2 Centro Universitário Fundação Assis Gurgacz, Programa de Graduação em Agronomia, Cascavel, PR, Brazil. [email protected]; [email protected] 3 Empresa Brasileira de Pesquisa Agropecuária, Embrapa Soja, Londrina, PR, Brazil. [email protected]; [email protected] 4 Universidade Federal do Paraná, Departamento de Solos e Engenharia Agrícola, Curitiba, PR, Brazil. [email protected]; [email protected]; [email protected] ?Corresponding author: [email protected] The work had financial support from Centro Universi-tario Fundação Assis Gurgacz. The authors declare there is no conflict of interests in carrying the research and publishing the manuscript.

Funders
Centro Universi-tario Fundação Assis Gurgacz
Centro Universitário Fundação Assis Gurgacz

    Keywords

    • chiseling
    • cover crops
    • Glycine max
    • gypsum application
    • soil fertility

    ASJC Scopus subject areas

    • General Veterinary
    • General Agricultural and Biological Sciences

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