Diferentes proporções entre volumoso e concentrado em dieta a base de silagem de cana-de-açucar para caprinos e ovinos em crescimento

Abstract

he objective of this study was to evaluate the effect of high concentrate diets in the feeding of confined lambs and goats on consumption, nutrient digestibility, balance of nitrogen compounds, microbial protein synthesis, ingestive behavior, performance and physical characteristics - came from the meat. The experiment lasted 60 days, preceded by 14 days for adaptation to the facilities and daily adjustment. Fourteen Santa Inês x Dorper lambs and 14 Boer goats were used, with approximately 120 days of age and average body weight of 20 kg, distributed in a completely randomized design (DIC) in a 2 x 2 factorial scheme (two concentrated ratios: roughage and two species). By means of randomization, the animals were distributed in two treatments, with seven contracts each. The experimental diets (corn cornmeal, cottonseed meal, urea, mineral mixture and sugar silage as a voluminous sugarcane source), with treatment T1 offered at a ratio of 40:60 and T2 at a ratio of 20:80 (V:C), respectively. At V: 20:80 C higher dry matter intake CMS Sheep species also presented higher intake of DM, MO, NDF and MOd than goats (P<0.05). The digestibility of DM, MO, CP and EE were higher for the goat species. It was observed the effect of the interaction (P<0.05) between the factors Species and Diet on the Nigested, N ingested, N absorbed and N retained. The animals fed with 20:80 had a lower number of records of rumination for idleness and increased (P<0.05) Animals the ingestion of DM intake and rumination. Final weight and gain were higher for species than final weight and for those fed diets 20, which means higher weights in kg meat, leg diaries, length width, gain width, length perimeters and rump length when compared to goats (P<0.05). The factor the types of characteristics or sensory analysis, and all types of characteristics or sensory changes were received as majori flavor, tenderness, juiciness, odor of the species influenced (P<0, scores 05). The sheep species presented meat with higher moisture, lower crude protein and ether extract (P<0.05). The mean SGA means were higher for goat species and the 40:60 diet. AGMI presented higher averages for sheep species, AGPI presented higher averages for goat species within the same diet.