Impacts caused by swine manure application and proper management proposition in a swine finishing farm

Abstract

Due to the increase in the PWW production level by the high concentration of animals per area, the intensification and concentration of pig farming in certain regions has resulted in the intensive application of swine manure (PWW) in the same terrain, which may provide the soil accumulation and the transference of elements may compromise the productive capacity of the territorial space of that region. In this sense, this work aimed to evaluate the elements concentration present in the soil and in swine waste, in relation to the values stipulated by CONAMA Resolution n. 420 (Conselho Nacional do Meio Ambiente [CONAMA], 2009) and also by CETESB n. 195/2005 (Companhia de Tecnologia Ambiental do Estado de São Paulo [CETESB], 2005), which provides for criteria and values guiding soil quality and groundwater for chemicals presence, and, based on the reference element, adapt to the technical standard P 4,231/2015 (Companhia de Tecnologia Ambiental do Estado de São Paulo [CETESB], 2015) proposed by CETESB for the dose calculation of vinasse application, in PWW application in pasture cultivation. The work accomplished at Fazenda Talhado Cinco de Março rural area - Rio Verde Municipality – Goiás state. Samples were performed to determine the soil physicochemical attributes and PWW chemical analysis of the soil, submitted to statistical analysis of Analysis of Variance and Tukey’s Test 5%. The results made it possible to verify that the used management is not the most appropriate, and it is necessary to review the procedures currently adopted, such as performing more constant soil and PWW analyzes, to avoid that their continual application in a disorderly manner and with possible negative impacts on the environment.