Irrigação de eucalipto com efluente sanitário de lagoa facultativa: eficiência do sistema solo-planta no pós-tratamento

Abstract

The experiment was developed in the city of Franca-SP. It aimed to evaluate the efficiency of the plant – ground system at the effluent post treatment, through the process of irrigation of the eucalyptus cultivation, monitoring the leachate quality, in the deeps of 0,30; 0,60 e 0,90m, and the DAP (Diameter at the High of the Plant Chest). Parcels were installed, forming 8 treatments, with 4 repetitions each one. From the 8 treatments, 2 were irrigated with water, 5 with effluents and 1 didn’t receive any kind of artificial irrigation. Referring to the seasoning 5 treatments received NPK, B and Zn; 4 of them were irrigated with wastewater and 1 with natural water. The leachated collected in the research area showed the presence of nitrate in the most of the treatments irrigated with effluent and a high efficiency in the BOD and COD removing. In relation to the plant, the statistic treatment, showed that the DAP development was bigger in the treatments irrigated with effluents than in the other ones. The results so far prove that the post treatment of effluent in the eucalyptus cultivation is effective concerning the sanitary and agronomic aspects.