Produtividade e qualidade nutricional de capim Tifton 85 sob aplicação de dejeto líquido de suíno e irrigação

Abstract

The use of irrigation and fertigation with liquid swine manure (DLS) can be in an excellent alternative to increase productivity and quality of pastures. This work was carried out from October 2013 to September 2014 in Dourados - MS and aimed to evaluate the productivity and nutritional quality of grass Tifton 85 under different doses of DLS in the presence and absence of (Cynodon spp.) irrigation. The experimental design was randomized blocks with split plots with and without irrigation in the plots, and four doses of DLS subplots: 75, 150, 225 and 300 m3 ha-1 cut-1, with four replications. There was a significant effect of irrigation and DLS doses Total dry matter yield, reaching 41400 kg ha-1 y-1 to the highest dose tested and to the use of irrigation. Irrigation also led to higher crude protein, growing linearly with doses of DLS, reaching 17.90% on annual average. The neutral detergent fiber and acid detergent fiber were lower under irrigation and decreased linearly with doses of DLS, reaching 65,40 and 32,55% on annual average, respectively, opposite behavior digestibility "in vitro" of matter dry, which were higher under irrigation, reaching 69,5% on annual average and showing increasing linear growth at doses of DLS.