Technological characteristics of the herbaceous cotton fiber under effect of nitrogen manuring and irrigation with treated wastewater

Abstract This research aimed to investigate the effect of treated wastewater and doses of nitrogen on the quality of the herbaceous cotton fiber, variety BRS 187 8H. The experimental design was in randomized blocks with factorial scheme [(2 x 5) + 2], in which the factors were: two types of water, 5 doses of nitrogen (0, 80, 160, 240 and 320 kg ha-1 of N), basal application with phosphorus and potassium, and two absolute controls (supply water and wastewater). The studied variables were: percentage of the sample with impurities; amount of particles, interpreted as impurities; fiber length; uniformity; index of short fibers and resistance; rupture elongation micronaire index; maturity; reflectance; yellowness degree; and fiability index. It was verified that The treated wastewater contributed positively and cotton fibers under this treatment presented larger length, uniformity, rupture elongation and had a smaller index of short fibers.