DETERMINAÇÃO DE EFEITOS QUÍMICOS, SANITÁRIOS E PRODUTIVIDADE EM SOLO FERTIRRIGADO COM EFLUENTE DE LATICÍNIOS

Abstract

Liquid effluents (wastewater) have high levels of organic matter, fats, salts, suspended solids and nutrients, and are considered the main source of pollution of these industries. The objective of this work was to evaluate soil clay dispersion, yield and health of mombaça grass, when submitted to different doses of dairy wastewater. The experiment was carried out in the field, delimiting 20 plots of 9 m² each (3 m x 3 m) with 1 m border, forming a completely randomized design. Treatments were made with the application of wastewater slides of dairy products with different sodium concentrations, at the following doses: T0 = 0 (control), T1 = 75, T2 = 150, T3 = 300 and T4 = 600 kg ha-1 Na+. In this research it is concluded that the dairy effluent can be used in the fertigation of mombaça grass with application rate of up to 600 kg of sodium, providing higher dry and fresh grass yields without sanitary contamination (even without hay) and without physical or chemical problems to the soil and the crop.