Effects of soil tillage and crop rotation systems on soil physical and chemical attributes and crop yield

• Autor(a) principal: Monteiro, Priscylla Ferraz Câmara
• Data de Publicação: 2019
• Outros Autores: Andrade, Andréia Patricia, Aires, Rogério Ferreira, Toigo , Marcelo de Carli
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Pesquisa Agropecuária Gaúcha (Online)
• Texto Completo: http://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/109
• topic: No-tillage; Harrow disc; Agricultural system; Annual crops; Plantio direto; Grade aradora; Sistema agrícola; Culturas anuais

No-tillage covers large cultivated areas in Brazil, being considered suitable for the sustainability of Brazilian agroecosystems. The objective of this study was to evaluate the effects of soil management and crop rotation systems on soil physical and chemical attributes as well as soybean yield. The experiment was carried out for four consecutive years (2014-2017) at Departamento de Diagnóstico e Pesquisa Agropecuária (DDPA) / Secretaria da Agricultura, Pecuária e Desenvolvimento Rural (SEAPDR), in Vacaria, Rio Grande do Sul State, Brazil. The treatments were: no-tillage with crop rotation (PDr), no-tillage with crop succession (PDs), scarified with crop rotation (Er) and conventional tillage with crop rotation (PCr). Soil physical (density, macroporosity and microporosity) and chemical (organic matter, P, K and pH) properties were evaluated as well as soybean crop yield. The soil physical attributes did not modify by the different soil management but the soil organic matter content increased in all evaluated treatments. There was no significant difference between the treatments for macro and microporosity of the soil but the soil density was sensitive for the soil management. The soybean yield did not differ significantly among the treatments. The preliminary results evidenced in short term is no need to mobilize the soil every three years in the areas operated under no tillage systems.