Exigência de proteína e energia para mantença de Carneiros Santa Inês.

Abstract

Requirements of protein and energy for maintenance of Santa Inês rams. The objective of this study was to evaluate the protein requirements for maintenance and energy of Santa Inês sheep in confinement. The experiment was conducted at the Center for Health and Rural Technology (CSTR), Federal University of Campina Grande (UFCG), Patos - PB, Brazil. Used 12 sheep, no castrated, Santa Inês of 35 kg, feedlot in metabolic cages, with devices for total collection of urine and feces and equipped with individual feeders and drinkers. Initially, the animals were weighed, identified and treated against endo and ectoparasites. The experiment lasted 21 days and sixteen days of diet adaptation and metabolic cages, and five days of data collection. The animals were divided into four groups with the same power, 50% of sorghum hay and 50% concentrate (28% corn, 19% soybean meal, 2% mineral mixture and 0.5% limestone) but the treatments were defined based on consumption of the diet, being pre-set as follows: TR0 = libitum feeding, 0% food restriction, TR30 = 30% feed restriction and TR60 = 60% feed restriction. Were collected daily offered food, feces and urine to be the chemical analysis. The protein requirements for maintenance for Santa Inês rams with 35 kg on average was estimated at 9.1 g CP / kg0,75/day and gross energy requirements for maintenance for Santa Inês rams with 35 kg on average was estimated at 0 23 Mcal/animal/day.