CRESCIMENTO E DESENVOLVIMENTO DO GERGELIM BRS SEDA IRRIGADO COM NÍVEIS DE ÁGUAS RESIDUÁRIA E DE ABASTECIMENTO

Abstract

The semiarid region is characterized by low rainfall, erratic rainfall, high evaporation and soil deficient in essential nutrients. In this context, the planned reuse of sewage water is an alternative to food production as they serve as natural fertilizer, generating economic returns and reducing environmental pollution. This study aimed to evaluate the growth and yield of sesame cultivar BRS irrigated with water supply and wastewater. The experiment was conducted on field conditions at the Experiment Station of Biological Wastewater Treatment - EXTRABES, in Campina Grande - PB. It was used a completely randomized design (CRD), arranged in a factorial 2x3 + 1, totaling 35 experimental units, the experimental unit was represented by polyethylene vessels with capacity of 30 liters and containing 32 kg of dry soil to air. The treatments were: a control treatment irrigated with water supply, three doses of decanted wastewater from domestic sewage and three doses of mineral fertilizer (N, P and K) based on quantities of 15 15 kg ha ¯ ¹ of N, 60 kg ha ¯ ¹ of P ₂ O ₅ and 50 kg ha ¯ ¹ of K ₂ O. The sesame showed higher average height, stem diameter, leaf area, dry matter and grain yield when irrigated with wastewater decanted, in T3 - 70% of irrigation water from domestic sewage and 30% water supply and T2 - irrigation with water from sewage, indicating that the use of domestic sewage is a good source nutrients, which provided a positive effect on growth and development of plants.