Correlação espacial entre atributos físicos do solo e morfológicos e produtividade de Sorghum bicolor (l.) moench

Abstract

Sorghum is a Poaceae family's cereal, originated in Africa and part of Asia. In Brazil, the low average yield of 2,756 kg.ha-1 can be explained by the poor rainfall distribution in certain regions during the cultivation and the low use of fertilizers. The present work aimed to identify geospatial patterns between panicle length, plant height, stem length, final stand and soil physical attributes linked to territorial of sorghum productivity behavior. This study was conducted in an area belonging to the Federal University of Uberlândia-MG, under no-tillage sorghum. The parameters were performed as from georeferenced samples, physical soil evaluation and determination of plant morphological. Data were evaluated by descriptive and geostatistical statistics for semivariogram adjustment, kriging interpolation and spatial distribution maps. Mean values, coefficient of variation (CV), asymmetry, kurtosis, and significant linear correlations have inferred the data geospatial behavior, verified by the spatial dependence, observed for the attributes with significant linear correlation between them. The semivariograms ranged from 291.29 m to 663 m. By the maps there is a distinct region of high productivity that strongly correlated with plant height and soil sand content. Therefore, is possible to conclude that there is geospatial behavior for productivity, and its spatial distribution correlates with the spatial behavior of soil physical and morphological attributes.