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Chilean Journal of Agricultural Research
Instituto de Investigaciones Agropecuarias, INIA
ISSN: 0718-5820
EISSN: 0718-5839
Vol. 73, No. 4, 2013, pp. 358-365
Bioline Code: cj13052
Full paper language: English
Document type: Research Article
Document available free of charge

Chilean Journal of Agricultural Research, Vol. 73, No. 4, 2013, pp. 358-365

 en Effect of vitamin E supplementation on growth performance, carcass characteristics and int Longissimus dorsi check for this species in other resources ramuscular fatty acid composition of muscle in 'Tan' sheep
Zhao, Tianzhang; Luo, Hailing; Zhang, Yuwei; Liu, Kong; Jia, Huina; Chang, Yanfei; Jiao, Lijuan & Gao, Weimin

Abstract

The beneficial effects on meat quality of adding vitamin E to diets have been extensively studied in cattle and lamb. However, how supplemental vit E affects the performance and meat quality of Tan sheep has not been reported. Thirty-five male lambs of Tan sheep (20-30 d after weaning) with similar body weight were randomly divided into five groups of seven each to receive a basal diet plus five levels of vit E supplementation: 0 (control group, CG), 20, 100, 200, and 2000 IU d-1 lamb-1. The results showed: 1) no differences were observed in animal growth performance between CG and vit E treated groups (VG) (P > 0.05); 2) vit E supplementation levels over 200 IU d-1 lamb-1 dramatically suppressed subcutaneous fat deposition and similarly that above 100 IU d-1 lamb-1 considerably reduced drip loss and pH 24 h of Longissimus dorsi check for this species in other resources (LD) muscle in VG lambs compared to those of CG (P < 0.01), but with no significant effect on other carcass characteristics (P > 0.05); 3) although vit E supplementation generally did not affect the fatty acid composition of intramuscular lipids in Longissimus dorsi (LD) muscle, the percentage of n-6 polyunsaturated fatty acids (PUFA) and the ratio of n-6/n-3 PUFA were significantly enhanced (P < 0.05) and an increasing tendency (P < 0.1) for both total PUFA proportion and the ratio of PUFA/saturated fatty acids (SFA) was also observed in Tan sheep lambs treated with vit E. In conclusion, vit E supplementation of male Tan sheep lambs did not influence growth performance, significantly reduced subcutaneous fat deposition, drip loss, pH 24 h and tended to improve fatty acid profile of LD muscle.

Keywords
Carcass characteristics; growth performance; vitamin E

 
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