本试验旨在比较安格斯牛、安本杂F1代(安格斯牛♂×湘西黄牛♀)和湘中黑牛(安格斯牛♂×安本杂F1代牛♀)之间生长性能、养分表观消化率、血清生化指标、瘤胃发酵参数和肉品质的不同.选取22月龄左右、胎次相近、饲养管理水平一致的健康安格斯牛[(458.97±34.43)kg]、安本杂 F1 代牛[(426.21±27.75)kg]和湘中黑牛[(420.58±29.62)kg]各 10 头作为试验动物,分为3组,饲喂相同的饲粮.预试期10 d,正试期60 d.结果表明:1)安格斯牛和湘中黑牛平均日增重(ADG)、干物质采食量(DMI)以及干物质(DM)、粗蛋白质(CP)、粗脂肪(EE)和总能(GE)表观消化率显著高于安本杂F1代牛(P＜0.05),料重比(F/G)显著低于安本杂F1代牛(P＜0.05).2)安格斯牛血清谷草转氨酶(AST)活性和肌酐(CRE)含量显著高于安本杂F1代牛和湘中黑牛(P＜0.05).3)安本杂F1代牛和湘中黑牛瘤胃pH显著高于安格斯牛(P＜0.05),安格斯牛瘤胃氨态氮(NH3-N)、乙酸、丙酸、丁酸、戊酸和总挥发性脂肪酸含量显著高于安本杂F1代牛和湘中黑牛(P＜0.05).4)各组肉品质指标无显著差异(P＞0.05).综上所述,安格斯牛的生长性能优于安本杂F1代牛和湘中黑牛,随着安格斯牛血统在湘西黄牛中比例的提高,湘中黑牛的生长性能和养分表观消化率优于安本杂F1代牛,而安本杂F1代牛和湘中黑牛更能抵抗后期育肥中高精料引起的肾脏损伤,本研究结果为湘中黑牛的品种选育提供了数据支撑.
Comparative Study on Growth Performance,Nutrient Apparent Digestibility,Rumen Fermentation Parameters and Meat Quality Between Angus Cattle and Xiangzhong Black Cattle
The aim of this experiment was to compare the differences in growth performance,nutrient apparent digestibility,serum biochemical indices,rumen fermentation parameters and meat quality of Angus cattle,hy-brid F1 generation cattle(Angus cattle ♂× Xiangxi yellow cattle ♀)and Xiangzhong black cattle(Angus cattle ♂×hybrid F1 generation cattle 9).Each ten healthy Angus cattle[(458.97±34.43)kg],hybrid F1 gen-eration cattle[(426.21±27.75)kg]and Xiangzhong black cattle[(420.58±29.62)kg]of about 22 months of age with similar parity and consistent feeding and management level were selected as experimental animals and divided into 3 groups,and they were fed the same diet.The pre-trial period lasted for 10 days,and the ex-perimental period lasted for 60 days.The results showed as follows:1)the average daily gain(ADG),dry matter intake(DMI)and apparent digestibilities of dry matter(DM),crude protein(CP),ether extract(EE)and gross energy(GE)of Angus cattle and Xiangzhong black cattle were significantly higher than those of hybrid F1 generation cattle(P＜0.05),and the ratio of feed to gain(F/G)was significantly lower than that of hybrid F1 generation cattle(P＜0.05).2)The aspartate aminotransferase(AST)activity and creatinine(CRE)content in serum of Angus cattle were significantly higher than those of hybrid F1 generation cattle and Xiangzhong black cattle(P＜0.05).3)The rumen pH of hybrid F1 generation cattle and Xiangzhong black cat-tle was significantly higher than that of Angus cattle(P＜0.05),and the rumen contents of ammonia nitrogen(NH3-N),acetate,propionate,butyrate,valerate and total volatile fatty acid of Angus cattle were significant-ly higher than those of hybrid Fl generation cattle and Xiangzhong black cattle(P＜0.05).4)There were no significant differences in meat quality indices among all groups(P＞0.05).In summary,the growth perform-ance of Angus cattle is better than that of hybrid F1 generation cattle and Xiangzhong black cattle.With the in-crease of the proportion of Angus cattle lineage in Xiangxi yellow cattle,the growth performance and nutrient apparent digestibility of Xiangzhong black cattle are better than those of hybrid F1 generation cattle,and the lat-ter and Xiangzhong black cattle are more resistant to kidney damage caused by high concentrate in late fatte-ning.The results of the present study provide data support for the selection and breeding of Xiangzhong black cattle breeds.[Chinese Journal of Animal Nutrition,2024,36(11):7134-7144]
Angus cattleXiangzhong black cattlegrowth performancerumen fermentation parametersmeat qualitycomparison
万方数据
维普
