Efeito da somatotropina bovina recombinante no desempenho e nas características químicas da carne de bovinos

• Autor(a) principal: Chardulo, Luis Arthur Loyola [UNESP]
• Data de Publicação: 1998
• Outros Autores: Silveira, Antonio Carlos [UNESP], Furlan, Luiz Roberto [UNESP], Arrigoni, Mario de Beni [UNESP], Costa, Ciniro [UNESP], De Oliveira, Henrique Nunes [UNESP]
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://seer.sct.embrapa.br/index.php/pab/article/view/4833; http://hdl.handle.net/11449/65395
• topic: Bovine growth; Growth hormone; Meat quality; Precocity

The objective of this study was to evaluate the effects of the use of recombinant bovine somatotropin (rbST) in weight gain, feeding efficiency and chemical characteristics of meat of young bulls. Fifty nine young bulls were used: 30 crossbred Simmental x Nelore and 29 Nelore aging between seven to eight months, weighing 236 and 116 kg, respectively. A randomized experiment in a 2 × 2 factorial arrangement was used. There were two levels of rbST (0 and 250 mg/animal/14 days) and two breed groups subdivided in two experimental phases. Diet was based on corn silage and concentrate aiming at a weight gain of 0.8 a day for Phase I (70 days) and 1.3 kg for Phase II (98 days). Animals were slaughtered at 13 months of age and the measurements of carcass dressing and meat quality were taken. Results showed that cross-breeding animals overcame (p<.01) the Nelore breed in weight gain and final weight at slaughtering. Use of rbST has not influenced weight gain, final weight, carcass weight and chemical characteristics of meat (p>.05). The use of rbST improved feeding efficiency 11.91 % for cross-bred and 24.32% for Nelore in Phase II.