Ganho de peso e avaliação in vivo de cordeiros ideal machos e fêmeas com a utilização de fósforo orgânico e vitamina B12 em pastejo

Abstract

This study aimed to evaluate weight gain and characteristics in vivo, loin eye area and state greasing Ideal lambs, reared in native and non-application of Organic Phosphorus and Vitamin B12. It was conducted between August 2011 and July 2012 in the premises of a private property in the municipality of Rosario do Sul - RS, in an Environmental Protection Area of Rio Ibirapuitã that is inserted in Pampa Biome. We used lambs and females, born in August 2011. The weighings were made monthly from birth to weaning at six months of age. The in vivo evaluations of rib eye area and fat thickness were performed at six and twelve months old. The lambs, males and females, were divided into two batches and each batch of 50% was applied by deep intramuscular the organic phosphorus associated with Vitamin B12 (FOB12) at 30 days and sixty days old, at the dosage recommended by the manufacturer. There was no significant difference between the male lambs and between females with and without application of FOB ¹ ². However, there was significant difference for treatments with and without FOB12 when evaluated males and females (P> 0.01). There was no interaction between the sexes within treatments with and without FOB12, for average daily gain weight. No significant differences were observed for ADG between males and females with and without FOB12, but on measures of in vivo evaluations at the time of weaning, at six months of age effect was observed only for body condition score (BCS) (P = 0.05) among treatments with FOB12 and without FOB12 between the sexes. The FOB12 no effect on weight gain and in vivo characteristics, rib eye area and fat thickness, influenced only the Ideal body condition in lambs raised on native pasture.