摘要
本试验旨在研究发酵稻草对安格斯牛生长性能、屠宰性能、血清生化指标及肉品质的影响。选择体重[(561.23±7.09) kg]相近、体况良好、23月龄左右的安格斯阉牛30头,随机分为3组,每组10个重复,每个重复1头。对照组饲粮中添加10.23%稻草,Ⅰ组饲粮中添加10.00%发酵稻草,Ⅱ组饲粮中添加20.00%发酵稻草,3组饲粮营养水平基本一致。预试期15 d,正试期165 d。结果表明;1)Ⅰ组和Ⅱ组的平均日增重、平均采食量和终末腹围显著高于对照组(P<0.05),料重比显著低于对照组(P<0.05)。与对照组相比,Ⅰ组和Ⅱ组的养殖效益分别提高了7.60%和14.94%。2)Ⅰ组和Ⅱ组的血清球蛋白和总蛋白含量显著高于对照组(P<0.05)。3)各组之间屠宰性能指标差异不显著(P>0.05)。4)Ⅰ组和Ⅱ组的肌肉肉色黄度(b*)值和粗脂肪含量显著高于对照组(P<0.05),肌肉剪切力显著低于对照组(P<0.05)。Ⅰ组和Ⅱ组的肌肉饱和脂肪酸(SFA)含量均低于对照组(P>0.05),肌肉单不饱和脂肪酸(MUFA)和多不饱和脂肪酸(PUFA)含量均高于对照组(P>0.05),肌肉必需氨基酸(EAA)、非必需氨基酸(NEAA)和总氨基酸(TAA)含量均高于对照组(P>0.05)。由此可见,在本试验条件下,发酵稻草可以提高安格斯牛生长性能和养殖效益,改善肉品质,且以添加量为20%为宜。
This experiment aimed to study the effects of fermented rice straw on growth performance,slaughter performance,serum biochemical indexes and meat quality of Angus cattle. Thirty about 23-month-old Angus steers with similar body weight[(561.23±7.09)kg]and good body condition were randomly divide into 3groups with 10 replicates per group and 1 cattle per replicate. Cattle in the control group were fed a diet supplemented with 10.23% rice straw,and others in groupⅠand groupⅡwere fed diets supplemented with 10%and 20% fermented rice straw,respectively,and the nutrient levels of the three groups are basically the same.The pre-feeding period was 15 days,and the normal feeding period was 165 days. The results showed as follows:1)the average daily gain,average daily feed intake and final abdominal circumference of groupⅠand groupⅡwere significantly higher than those of the control group(P<0.05),and the feed to gain ratio was significantly lower than that of the control group(P<0.05). Compared with the control group,the breeding benefits of groupⅠand groupⅡwere increased by 7.60% and 14.94%,respectively. 2)The contents of globulin and total protein in serum of groupⅠand groupⅡwere significantly higher than those of the control group(P<0.05). 3)There were no significant differences in slaughter performance indexes among all groups(P<0.05). 4)The meat color yellowness(b*)value and ether extract content in muscle of groupⅠand groupⅡwere significantly higher than those of the control group(P<0.05),and the muscle shear force was significantly lower than that of the control group(P<0.05). The muscle saturated fatty acids(SFA)content of groupⅠand groupⅡwas lower than that of the control group(P>0.05),the contents of monounsaturated fatty acids(MUFA)and polyunsaturated fatty acids(PUFA)in muscle were higher than those of the control group(P>0.05),and the contents of essential amino acids(EAA),nonessential amino acids(NEAA),and total amino acids(TAA)in muscle were higher than those of the control group(P>0.05). In conclusion,under the condition of this experiment,fermented rice straw can improve the growth performance and breeding efficiency of Angus cattle,improve the meat quality,and the suitable addition amount is 20%.
作者
张转弟
张巧娥
王庆
李月
李云鹤
ZHANG Zhuandi;ZHANG Qiaoe;WANG Qing;LI Yue;LI Yunhe(College of Agriculture,Ningxia University,Yinchuan 750021,China)
出处
《动物营养学报》
CAS
CSCD
北大核心
2022年第6期3732-3742,共11页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
宁夏回族自治区重点研发计划项目“粗饲料高质化利用及肉牛精准饲喂技术研究与集成利用”(2021BEF02030)
财政部和农业农村部——国家现代农业产业技术体系资助项目(CARS-37)。
关键词
发酵稻草
安格斯牛
生长性能
屠宰性能
肉品质
fermented rice straw
Angus cattle
growth performance
slaughter performance
meat quality
