摘要
为了研究瘤胃保护型半胱氨酸对肉羊胴体性状的影响,本试验在滩寒杂交羊的饲料中添加浓度为0、0.20%、0.40%和0.80%的瘤胃保护型半胱氨酸,饲喂70d,屠宰后检测屠宰性能、产肉性能和脂肪沉积情况。结果表明,在滩寒杂交羊的饲料中添加不同浓度的瘤胃保护型半胱氨酸对于羊的屠宰性能、产肉性能和脂肪沉积均有不同程度的影响。其中,饲料中添加0.20%、0.40%和0.80%的瘤胃保护型半胱氨酸后,屠宰率分别比对照提高4.66%、3.91%和10.51%,尤其是饲料中添加0.80%半胱氨酸能够显著提高屠宰率(P<0.05);净肉率分别提高了0.39%、6.49%和5.43%,表明饲料中添加0.40%半胱氨酸能够显著提高净肉率(P<0.05);GR(用胴体脂肪含量值,Carcass fat content)值分别提高8.39%、13.03%和11.76%,但与对照组相比效果不显著(P>0.05)。因此,在滩寒杂交羊的饲料添加0.40%的瘤胃保护型半胱氨酸可以改善肉羊胴体性状,为研究通过在饲料中添加半胱氨酸提高肉羊胴体性状奠定基础,也为探索半胱氨酸在其他动物饲料中的添加量提供理论基础和借鉴。
To investigate the effects of rumen-protected cysteine on the carcass traits of housing- feeding mutton sheep, dif- ferent concentrations of rumen-protected cysteine （0, 0. 20%, 0.40%, 0. 800%） were added in the fodder of Tan × Han hybrid sheep F1. After 70 days feeding, slaughter performance, meat performance and fat deposition were evaluated and analyzed. The results indicated that slaughter performance, meat performance and fat deposition of Tan × Han hybrid sheep F1 were af- fected by adding different concentrations of rumen-protected cysteine. Dressing percentage was improved by 4.66 %, 3.91%, 10.51% respectively in the experiment groups compared with that of control group and the group added 0.80% cysteine im- prove the dressing percentage significantly （P 〈 0.05）. Meat percentage was improved by 0.39%, 6.49%, 5.43% respec- tively compared with that of control group and the group added 0.40% cysteine improve the meat percentage significantly （P 〉0.05）. GR was improved by 8. 39%, 13. 03%, 11. 76% respectively compared with that of control group （P 〉 0. 05） and there were no significant difference among control and experimental group. These results suggested that Tan × Han hybrid sheep carcass characters was improved by adding 0.40% cysteine in fodder.
出处
《畜牧兽医杂志》
2015年第5期4-7,共4页
Journal of Animal Science and Veterinary Medicine
