Characteristics of external components and discard fat of castrated or non-castrated young steers of different genotypes, feedlot finished

Revista Brasileira de Zootecnia

Brondani, Ivan Luiz¹  Silva, José Henrique Souza da¹  Arboitte, Miguelangelo Ziegler¹  Weise, Matheus Smidt¹  Cattelam, Jonatas¹  Freitas, Leandro da Silva¹ 

[1]UFSM

关键词: Charolais;    empty body weight;    Nellore;    rawhide;    sexual condition    Introdução Junto com a valorização da carne bovina;    tem-se dado ênfase ao estudo dos componentes não-integrantes da carcaça;   

DOI  :  10.1590/S1516-35982011000800022

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

The objective of this study was to evaluate the characteristics of external components and discard fat of young steers with two different sexual conditions and two different genotypes, finished in feedlot. Average age and weight of the animals at the beginning of the experimental period were 12 months and 267.0 kg, respectively. The steers were in feedlot until reaching pre-established slaughter weight of 400 kg. Diet contained roughage:concentrate ratio of 50:50, on dry matter basis, with 10% crude protein. It was used a complete randomized experimental design, in a 2 × 2 factorial arrangement, composed of two sexual conditions and two genetic groups. Empty body weight (EBW), carcass dressing in relation to empty body weight and the relationship between empty body weight and slaughter weight were similar among genotypes and sexual conditions. For absolute weight of ears, it was observed significant interaction between genotypes and sexual conditions of steers. Castrated animals showed greater values of intestinal fat in relation to empty body weight (1.62 versus 1.18%). Animals with Charolais predominance showed greater absolute values to tail broom (0.16 versus 0.11 kg) and Nellore steers predominance presented greater weight related to rawhide and renal fat. There is no correlation among carcass dressing and non-integrant components of carcass.

【 授权许可】

CC BY-NC