Alguns impactos ambientais relacionados com a aplicação de chorume de suinos na agricultura. Caso de estudo com a cultura de milho (Zea mays L.) no Brasil

Mestrado em Engenharia do Ambiente - Instituto Superior de AgronomiaSwine production is one of the livestock activities which has the greatest potential to lead to environmental pollution. This study aims to assess the environmental impact of the application of fresh pig slurry to a red distroferric latosol on leachate drainage from lysimeters, and define the best way of recycling this waste. The experiment was conducted with maize crop (Zea mays L.) grown in 24 lysimeters and under field conditions. Eight treatments with three replicates were used. Four levels of manure (0, 100, 200 and 300 m3.ha-1) were applied and half of the lysimeters were fertilized with both pig slurry and mineral fertilizer. Two samples of leachate were collected (12 and 85 days after seeding) as well as two soil samples (before slurry application and at the end of the crop cycle).The pH, and concentrations of nitrogen, phosphorus, potassium, copper and zinc, were determined in the soil samples, to assess the effects of the presence of these nutrients in the slurry. From the results obtained and under the experimental conditions, application of fresh pig slurry did not cause negative environment impacts in soil and water, regarding the analyzed element