Soil attributes and soil aggregate stability relationship in sugarcane fields with and without vinasse application

摘要

> size="2" face="Verdana, Arial, Helvetica, sans-serif">The present study had as objective of evaluating of the effects of vinasse application on aggregate stability and in indice of soil aggregation as well as dependence of physical properties of the soil in sugarcane growing areas in south coast of Pernambuco, Brazil. Soil samples were collected from 0-0.20 and 0.20-0.40 m layers in 12 areas with and without vinasse application. Analysis was carried out to characterize soil and to evaluate, water dispersed clay, degree of clay flocculation, total organic carbon and organic matter in soil. The stability of aggregates in water was calculated through the aggregation indice: weighted mean diameter (PMD), module of fineness (MF) and percentage of aggregate 2.00 mm (AGRI) which showed significant differences between areas with and without vinasse. In areas with vinasse the organic carbon presented better correlations with PMD, MF and AGRI than without vinasse. The higher percentage of AGRI occurred in 0-0.20 m in areas with application of vinasse.