Avaliação da qualidade do lixiviado em argissolo amarelo latossólico com aplicação de água de lavagem e despolpa do café.

Abstract

The wastewater of coffee (WWC) is rich in organic substance and nutrients, but when applied in high doses it can contaminate table water sheet through the leaching process. The present work was carried through with the objective to evaluate the quality of the soil leached with application of increasing doses of WWC. The experimental design was completely randomized with four treatments and three replications, totalizing 12 columns of PVC with 100 mm diameter and 800 mm of height. The applied doses of WWC were: 214 mL (treatment 1), 642 mL (treatment 2), 1070 mL (treatment 3) and 1070 mL of supplying water (control) corresponding to 1, 3 and 5 times the potassium necessity (80g K2O/plant of coffee) required by the coffee in production. After 60 (collect 1) and 75 days (collect 2) of the application of WWC, it was applied leached sheets with water collected the leached. It was set up analysis of EC, pH, OCD, and K. The WWC did not affect pH of leached at both collects. The values of OCD were low in relation to CRW applied in soil. The application in soil of the rate equivalent to K necessity in coffee did not affect leached quality.