O presente trabalho teve como objetivo avaliar o desempenho produtivo e características de carcaça de garrotes Nelore submetidos a diferentes métodos de castração. Foram avaliados o ganho de peso diário, crescimento dos tecidos muscular e adiposo. Quarenta garrotes Nelore foram distribuídos em três grupos T1: 20 machos imunocastrados com anti GnRH, T2: 10 machos castrados com o método cirúrgico e T3: 10 machos não castrados (inteiros). O delineamento utilizado foi o inteiramente casualizado com nível de 5% de significância. Todos os animais encontravam-se no sistema de semi confinamento, onde recebiam uma dieta com 75% NDT e 17% PB, sendo oferecido aos animais 1.5% do peso vivo do lote, duas vezes ao dia. Os diferentes métodos de castração (imunocastração ou cirúrgico) não alteraram o desempenho e as características de carcaça de garrotes Nelore na fase de terminação, porém os animais não castrados tiveram desempenho superior (ganho médio diário e peso final) em relação aos castrados. Palavras-chave: acabamento, carcaça, espessura de gordura, imunocastração, vacina Productive performance and carcass characteristics in Nellore cattle subjected to different methods of castration ABSTRACT This study aimed to evaluate the performance and carcass traits of Nellore steers submitted to different methods of castration. The daily weight gain was evaluated as well as muscle growth and adipose tissue. Forty Nellore steers were distributed into three groups; T1: 20 animals immunocastrated with anti-GnRH, T2: 10 animals surgically castrated and T3: 10 animals as control group. The experimental design was completely randomized and results were compared at 5% significance level. All animals were managed in a semi-confined system, fed twice a day offering 1.5% of body weight adjusted to average of the group, with a diet containing 75% TDN and 17 % CP. The different methods of castration (surgical or immunocastration) did not influence the performance and carcass traits of finishing Nellore steers while uncastrated animals got bigger performance (average daily gain and final weight) compared to castrated group.
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