Strategy of specification of management areas: rice grain yield as related to soil fertility

Revista Brasileira de Ciência do Solo

Flávio Carlos Dalchiavon²  Morel De Passos E Carvalho¹  Rafael Montanari¹  Marcelo Andreotti¹ 

[1] ,Instituto Federal de Mato Grosso Departamento de Agronomia Campo Novo do Parecis MT

关键词: precision agriculture;    soil fertility;    geostatistics;    spatial variability;    Oryza sativa;    agricultura de precisão;    geoestatística;    variabilidade espacial;    Oryza sativa;   

DOI  :  10.1590/S0100-06832013000100005

来源: SciELO

【 摘 要 】

It is well-known nowadays that soil variability can influence crop yields. Therefore, to determine specific areas of soil management, we studied the Pearson and spatial correlations of rice grain yield with organic matter content and pH of an Oxisol (Typic Acrustox) under no- tillage, in the 2009/10 growing season, in Selvíria, State of Mato Grosso do Sul, in the Brazilian Cerrado (longitude 51º24' 21'' W, latitude 20º20' 56'' S). The upland rice cultivar IAC 202 was used as test plant. A geostatistical grid was installed for soil and plant data collection, with 120 sampling points in an area of 3.0 ha with a homogeneous slope of 0.055 m m-1. The properties rice grain yield and organic matter content, pH and potential acidity and aluminum content were analyzed in the 0-0.10 and 0.10-0.20 m soil layers. Spatially, two specific areas of agricultural land management were discriminated, differing in the value of organic matter and rice grain yield, respectively with fertilization at variable rates in the second zone, a substantial increase in agricultural productivity can be obtained. The organic matter content was confirmed as a good indicator of soil quality, when spatially correlated with rice grain yield.

【 授权许可】

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