家禽科学2026，Vol.48Issue(6)：13-20,8.
日粮粗蛋白质水平对坝上长尾公鸡生长性能、屠宰性能及肉品质的影响
Effects of Dietary Crude Protein Level on Growth Performance,Slaughter Performance and Meat Quality of Bashang Long-tailed Roosters
摘要
Abstract
This experiment was conducted to investigate the effects of dietary crude protein levels on growth perfor-mance,slaughter performance and meat quality of Bashang long-tailed roosters.A total of 300 6-week-old Bashang long-tailed roosters with similar body weight were selected and randomly assigned to 5 treatment groups,with 10 replicates per group and 6 chickens per replicate.The chickens in the five groups were fed diets with crude protein levels of 14%(Group Ⅰ),15%(Group Ⅱ),16%(Group Ⅲ),17%(Group Ⅳ)and 18%(Group Ⅴ)respectively,and the experimental peri-od lasted for 13 weeks.The results showed that the total weight gain and average daily gain of Group Ⅲ,Ⅳ and Ⅴ were significantly higher than those of Group Ⅰ and Ⅱ(P<0.05).At 17 weeks of age,the slaughter rate and semi-eviscerated percentage of Group Ⅲ and Ⅳ were significantly higher than those of Group Ⅰ and Ⅱ(P<0.05).The eviscerated percent-age of Group Ⅰ,Ⅲ and Ⅴ was significantly higher than that of Group Ⅱ and Ⅳ(P<0.05).The abdominal fat percentage of Group Ⅲ,Ⅳ and Ⅴ was significantly lower than that of Group Ⅰ and Ⅱ(P<0.05).The breast muscle pH value of Group Ⅲ was significantly higher than that of other groups(P<0.05).The crude protein contents in breast muscle and leg muscle of Group Ⅰ were significantly lower than those of the other four groups(P<0.05).The leg muscle crude fat contents of Group Ⅲ and Ⅳ were significantly higher than those of the other three groups(P<0.05).At 19 weeks of age,the slaugh-ter rate of Group Ⅲ,Ⅳ and Ⅴ was significantly higher,while the abdominal fat percentage was significantly lower than those of Group Ⅰ and Ⅱ(P<0.05).The breast muscle pH value,crude protein content and leg muscle crude fat content of Group Ⅲ,Ⅳ and Ⅴ were significantly higher than those of the other two groups(P<0.05).The leg muscle pH value of Group Ⅱ,Ⅲ and Ⅳ was significantly higher than that of Group Ⅰ and Ⅴ(P<0.05).Considering the indexes of growth performance,slaughter performance and meat quality,the dietary crude protein level of 16%exhibited the optimal compre-hensive performance for Bashang long-tailed roosters.关键词
粗蛋白质水平/坝上长尾公鸡/生长性能/屠宰性能/肉品质Key words
Dietary crude protein level/Bashang long-tailed roosters/Growth performance/Slaughter performance/Meat quality分类
农业科技引用本文复制引用
和雁南,李文菊,章飞,杨二聪,刘海斌,王惠娥..日粮粗蛋白质水平对坝上长尾公鸡生长性能、屠宰性能及肉品质的影响[J].家禽科学,2026,48(6):13-20,8.基金项目
北京中医药大学青年教师项目(2019-JYB-JS-064) （2019-JYB-JS-064）
现代农业产业技术体系(HBCT2023210406) （HBCT2023210406）
