| Full text | |
| Author(s): |
Emanuel Almeida de Oliveira
[1]
;
Alexandre Amstalden Moraes Sampaio
[2]
;
Alexandre Rodrigo Mendes Fernandes
[3]
;
Wignez Henrique
[4]
;
Rodrigo Vidal Oliveira
[5]
;
Glauco Mora Ribeiro
[6]
Total Authors: 6
|
| Affiliation: | [1] Unesp. FCAV
[2] Unesp. FCAV. Departamento de Zootecnia
[3] UFGD. Departamento de Zootecnia
[4] APTA
[5] UFT. Departamento de Zootecnia
[6] UFT. Departamento de Zootecnia
Total Affiliations: 6
|
| Document type: | Journal article |
| Source: | REVISTA BRASILEIRA DE ZOOTECNIA-BRAZILIAN JOURNAL OF ANIMAL SCIENCE; v. 38, n. 12, p. 2465-2472, 2009-12-00. |
| Abstract | |
The objective of this study was to evaluate the performance and carcass traits of young bulls, finished in a feedlot and fed diets with sugarcane (Var. SP 80-1816) and two concentrate levels (40 or 60 % of the DM). Fifteen Nellore bullocks, with approximately 330 kg and 18 months old, and 15 Canchim bullocks (5/8 Charolês ×3/8 Nellore), with approximately 300 kg and 15 months old, were used. The animals were housed in individual pens for a period of 126 days, with the first 21 days of adaptation. The animals were weighed and ultra-sound images were taken at the beginning of the experiment and at every 35 days. A randomized complete design was used in a factorial scheme (2 genetic groups ×2 concentrate levels). There were no significant interactions for any of the evaluated variables. The Canchim animals presented better feed efficiency (0.17 ×0.14) and higher loin eye area gain (19.7 ×13.2 cm²). The 60% concentrate diet improved better daily weight gain (1.44 ×0.98 kg/animal), slaughter weight (499.43 ×460.20 kg), hot carcass weight (265.39 ×244.70 kg) and hindquarter weight (129.74 ×118.68 kg). The Canchim animals presented larger loin eye area (80.89 ×66.85 cm²) and the Nellore animals presented thicker backfat (5.5 ×3.2 mm). Diets with 60% concentrate are better for finishing cattle with high potential for liveweight gain than diets with 40% concentrate. (AU) | |