Água residuaria de suinocultura nos atributos do solo e produtividades da soja e do milho

Abstract

Due to the need to develop minimization techniques, final treatment and disposal of swine confinement of waste, the objective of this study was to evaluate the chemical and physical attributes of a solo and productivity of soybean (Glycine max) and corn (Zea mays) in wastewater doses of swine (WDS). The field experiment was conducted in a randomized block design with five treatments and four replications, totaling 20 installments. Treatments were different levels of organic fertilization ARS. And T1 (chemical fertilizer), T2, T3 and T4 (organic fertilizer with doses of 1280, 170 and 50 m3 ha-1 ARS) and T5 (more organic chemical fertilization with dose 50 m3 ha-1 WDS). There were two fertilizations, one in soybean sowing and another at sowing corn. Sampling and soil analyzes were performed before the cultivation of soybeans and after the corn harvest. As for the soil chemical properties, there was an increase in magnesium levels (mg), calcium (Ca), bases Sum (SB) and base saturation (V%) and there was a decrease in aluminum content (Al), phosphorus (P) and potassium (K), after the two applications and two crops (soybeans, corn succession). And, the highest dose of WDS managed to maintain the same level Q. soil physical attributes were no significant changes, as in well-structured soils changes in its structure are slow. The application of ARS allowed to obtain good seed yield levels. In soybean productivity treatments WDS application was similar to fertilized with chemical fertilization. While the productivity of corn was higher in the treatments with WDS application compared to chemical fertilizer. WDS can be used as fertilizer replace or supplement chemical fertilizer on crops of soybeans and corn, but with constant monitoring of nutrient accumulation in the soil, so that there is an imbalance of the same.