Atributos químicos do solo com aplicação de água residuária de suinocultura em um sistema silvipastoril

Abstract

Several studies have shown that the use of swine wastewater contributes to an improvement in soil attributes, which favors the increase of fertility and, consequently, a better production. With this, students from the Federal University of Uberlândia created an experiment to study soil chemical attributes that are benefited by the use of swine wastewater. The experiment was carried out at Bonsucesso Farm, in the city of Uberlândia - MG, Brazil, the objective of this work was to evaluate the influence of different doses of ARS on the chemical attributes of a silvipastoril system. A randomized complete block design with 5 replicates and 5 treatments was used. The treatments consisted of one without the application of swine residue and the application of 200 m3 ha-1 year-1, 400 m3 ha-1 year-1, 600 m3 ha-1 year-1 and 800 m3 ha- 1. In the present work, the chemical attributes such as pH, Al, acidity (H + Al), Total CTC (T), effective CTC (t), saturation by Al (m) and saturation by base (V), and macronutrients, P, S, Mg and Ca. These are evaluated at depths of 0-20, 20-40 and 40-60 cm and in different samples being these in the projection of the eucalyptus crown and in the planting line. The use of Swine Residual Water influences the pH, base sum, Al, acidity, Total CTC, effective CTC and Al saturation levels regardless of depth and type of sample. In the saturation content by bases it had influence in the depths of 20-40 and 40-60 cm regardless of the type of depth. The values of P and S were influenced at different depths and samples. The different doses of Swine Residual Water had influence on P, Al, Total CTC, effective CTC, Al saturation and Mg.