Crescimento e produção do capim tifton 85 submetido a doses de nitrogênio e irrigado com água residuária.

Abstract

Given the climatic conditions of semi-arid regions and, consequently, the low production of animal feed, there is a need to develop techniques and practices that can minimize this problem. The use of waste in pasture production has become a promising practice because it reduces production costs and environmental impacts caused by improperly discarded waste. Therefore, the aim of this study was to analyze the growth and production of Tifton 85 grass irrigated with treated domestic wastewater and fertilization from avian litter in a protected environment, between the months of June and December 2016. The experimental design was a completely randomized design, in a 5 x 2 factorial scheme, where five nitrogen doses (0; 15; 30; 45; 60 kg ha-1) were used from poultry litter and two water sources (Treated domestic wastewater and artesian well water) with four replications totaling 40 experimental units. The grass cultivation was carried out in pots distributed in protected environment and submitted to daily irrigation according to crop evapotranspiration. Grass growth showed significant differences only in the fourth cut as a function of irrigation water. The production of Tifton 85 grass, evaluated as a function of the green and dry mass, was higher in the plants irrigated with wastewater in all the cuts, presenting significant differences in all the cuts, except for the first cut. The growth and production of the grass did not present significant differences as a function of the nitrogen doses from the aviary bed in any of the cuts. Treated domestic wastewater promotes water replenishment and further contributes to the further development and production of Tifton 85.