Feno da parte aérea da mandioca na dieta de ovinos

Abstract

The objective of this study was to evaluate the effect of the substitution of tifton 85 hay for manioc hay on the consumption, biochemical parameters and performance of sheep in confinement. Thirty - five lambs ½ Dorper / ½ Santa Inês, castrated, with an average age of 140 days, and initial weight of 16 ± 1.87 kg, were housed in individual stalls provided with feeders and drinking fountains. The experimental period lasted 90 days, fifteen of which were directed to adaptation to facilities and management. The treatments consisted of five diets formulated to meet the requirement for gain of 200 g / day of growing sheep, namely: FT = tifton 85 hay (70% of MS) + concentrate (30% of DM); FPAM = manioc aerial hay (70% of MS) + concentrate (30% of DM); FT + FPAM = tifton 85 hay (35% of MS) + PAM hay (35% of MS) + concentrate (30% of MS); FT + PAL = tifton 85 hay (35% of MS) + forage palm (35% of MS) + concentrate and FPAM + PAL = hay of PAM (35% of MS) + forage palm (35% of MS) + concentrate (30% of MS). The diets were offered as a complete mixture, distributed in two daily meals (8 and 16 h). Dry matter intake was higher in sheep fed on cassava shoots (FPAM) when compared to sheep fed tifton 85 (FT) hay. No change in protein metabolites was observed, but the activity of the gammaglutamyltransferase enzyme (gamma GT) was higher in sheep fed FPAM + PAL. There was an effect of the diets (P <0.05) on performance, with higher weight gain for the animals that consumed FT + PAL and FPAM + PAL. Total FT replacement by FPAM provided higher DM intake and association with forage palm resulted in greater weight gain.