Inter-relation between soybean yield and soil compaction under degraded pasture in Brazilian Savannah

Revista Brasileira de Ciência do Solo

Rienni De Paula Queiroz²  Edson Lazarini¹  Marcio Lustosa Santos¹  Morel De Passos E Carvalho¹  Cristiano Santos¹ 

[1] ,Instituto Federal de Educação, Ciência e Tecnologia de Mato Grosso do SulNova Andradina Mato Grosso do Sul ,Brazil

关键词: soil conservation;    crop rotation;    pasture management;    Glycine max (L.) Merrill;    spatial variability;    conservação do solo;    rotação de culturas;    manejo da pastagem;    Glycine max (L.) Merrill;    variabilidade especial;   

DOI  :  10.1590/S0100-06832011000500012

来源: SciELO

【 摘 要 】

The Cerrado (Brazilian Savannah) plays an important economic and financial role in the nation, since the pastures of this biome feed cattle for half of the domestic bovine meat productivity, and its agricultural fields produce a third of the country's grain. The variability and spatial dependence between the soil physical attributes and soybean yield were evaluated in a crop rotation planted on a degraded brachiaria pasture, on a dystroferric Red Latosol of an experimental farm of the State University of São Paulo (UNESP), in the 2005/2006 growing season. The linear and spatial correlations between these attributes were also studied, to determine conditions that would allow increased agricultural productivity. In the above pasture area, a grid was installed with 124 plots, spaced 10.0 x 10.0 m and 5.0 x 5.0 m apart, in a total area of 7,500 m². From the linear and spatial point of view, the high grain yield can be explained by the number of grains per plant and soil macroporosity. The high variability observed for most soil properties indicated that the crop - livestock integration system results in environmental heterogeneity of the soil.

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