<b>Effect of the application of slaughterhouse wastewater treated on stabilization ponds on soil and corn development</b>

Abstract

The objective was to evaluate effect of application in different doses of wastewater from slaughterhouse in  an Oxisoil and on corn development . The wastewater was collected after treatment in stabilization ponds. Doses of 150 m3 ha-1, 450 m3 ha-1, 900 m3 ha-1 and 1350 m3 ha-1 of wastewater were applied during the growing season of corn. It was used 12 columns of soil of 0.25 m in diameter and 0.65 m in height. The percolated material was analyzed at all doses and presented a reduction of the nitrogen parameters (Kjedhal) of 0.02 g L-1 and phosphorus of 0.1 mg L-1 in all treatments. At higher doses, 900 m3 ha-1, the potassium content was 12.08 mg L-1 and calcium and magnesium increased by 40% and 173% on average, respectively. It was observed a sodium reduction of 92% and there was reduction of BOD and COD. The plants that received the doses 450 m3 ha-1, 900 m3 ha-1 and 1350 m3 ha-1 presented higher values of green matter, length of spike and number of leaves. The soil fertility has not undergone dramatic changes with respect to the parameters analyzed.