Algodão herbáceo colorido irrigado com esgoto sanitário tratado e com água de poço submetido à adubação nitrogenada

Abstract

Water scarcity is a reality in many parts of the world and the demand for water for irrigated agriculture is quite significant, so the use of lower quality water is a viable alternative for these purposes. The objective of the present study to investigate the effects caused by irrigation with two types of water and nitrogen fertilization on growth, development and production of upland cotton (Gossipium hirsutum L), BRS TOPÁZIO. The experiment was conduced in the field in the period from March 25, 2014 to August 15, 2014 at Estação Experimental de Tratamentos Biológicos de Esgotos - EXTRABES, neighborhood of Tambor, in Campina Grande city, Paraíba. The experimental design was completely randomized and factorial 2x4, with three repetitions, totaling 24 units, the factors made up of four nitrogen rates (0, 20, 40 and 60 kg. Ha-1) and two types of water (sewage sanitary treated in a UASBH reactor and artesian wellwater). In plants that received the treatment with treated sewage, given its nutrient richness, then the observed increase in stem diameter and height of the subjects, larger leaf area and higher yield, as compared with the irrigated with wellwater. The 40 kg. ha - ¹ nitrogen dose associated with treated sewage water had the highest production rate.