Substituição do farelo de soja por levedura de cana-de açúcar no desempenho e características de carcaça de cordeiro

Abstract

The aim of this study was to determine replacement of soybean meal by yeast sugar cane on performance and carcass characteristics of lamb fed diets with four levels of sugar cane yeast. The study included 36 lambs Santa Ines aged approximately 120±15 days with an average weight of 21.46 ± 3.4 kg The experimental design was a randomized complete block design with four treatments and nine repetitions. Data were subjected to analysis of variance. The inclusion levels of yeast were: 0.0, 33.0, 66.0 and 100.0% in replacement of soybean meal. Our results showed a significant effect (P≤0.05) for dry matter intake expressed as kilograms per day (kg / day), when expressed as percentage of body weight (% BW) and no influence for variable intake of dry matter in grams per metabolic weight (g / kg PV0,75). The water consumption expressed in liters per day (L/day) and in milliliters per metabolic weight (ml/kg PV0,75) had no effect, since for consumption liters per kg of dry matter intake (L/kg DM ) had no effect. Treatment without adding yeast had higher gross margin carcass. Decreased linearly to slaughter live weight, daily weight gain, hot carcass weight and cold carcass yield and cold and empty body weight was altered by the inclusion of sugar cane yeast. The initial weight loss by cooling and biological yield were not affected by the inclusion of sugar cane yeast. The yields of retail cuts was modified by the addition of yeast, because there was a decreasing linear effect, except for the neck.