低蛋白日粮对黄羽肉鸡生长性能及胴体品质的影响  

Effects of low protein diets on growth performance and carcass quality of yellow feather broilers

作　　者：葛莹[1] 范京辉[1] 李庆海[1] 刘航 王欢欢[1] 魏莹晖 张雷[1] GE Ying;FAN Jinghui;LI Qinghai;LIU Hang;WANG Huanhuan;WEI Yinghui;ZHANG Lei(Hangzhou Academy of Agricultural Sciences,Hangzhou 310024,Zhejiang)

机构地区：[1]杭州市农业科学研究院,浙江杭州310024

出　　处：《浙江农业科学》2024年第2期454-458,共5页Journal of Zhejiang Agricultural Sciences

基　　金：杭州市科技局农业与社会发展科研项目(202003A02);杭州市科技局农业和社会发展重点项目(202203A10)。

摘　　要：试验旨在研究低蛋白日粮对黄羽肉鸡生长性能、胴体品质及肉质的影响。试验选取1日龄慢速型母鸡360羽,设对照组、试验组,每组6个重复,每个重复30只鸡。试验组1~6周(w)、7~13 w、14~19 w阶段日粮粗蛋白浓度,分别设定为对照组的90%、95%、100%,配方中增加玉米副产物比例、降低豆粕与大豆油用量。结果显示,相比于对照组,试验组鸡各阶段体重明显下降(P<0.05),1~6 w增重明显降低(P<0.01)、料重比增高(P<0.01),全程料重比无显著变化(P>0.05);鸡腹脂率显著下降(P<0.05),胸肌a值、肉色L值优于对照组(P<0.05);单位增重所需日粮粗蛋白下降1.7%,饲料成本下降7.1%。综上所述,在本研究条件下,下调生长前、中期日粮的粗蛋白浓度会明显降低黄羽肉鸡全期生长速度,但能节约增重饲料成本,对胴体品质、肉质有一定的改善作用。The experiment aims to investigate the effects of low protein diets on growth performance,carcass quality,and meat quality of yellow feather broilers.In this study,360 1-day-old slow-growing hens were selected,and a control group and an experimental group were set up.Each group had 6 replicates,with 30 chickens per replicate.The crude protein concentration in the diet of the experimental group at stages 1-6 weeks,7-13 weeks and 14-19 weeks was set at 90%,95% and 100% of the control group,respectively.The formula increased the proportion of corn by-products and reduced the dosage of soybean meal and soybean oil.The results showed that compared with the control group,body weight of the experimental group significantly decreased at all stages(P<0.05),weight gain decreased at 1-6 weeks(P<0.01),and feed to gain ratio increased(P<0.01).There was no significant change in the whole feed to gain ratio(P>0.05).The abdominal fat rate of chickens significantly decreased(P<0.05),and the color of chest muscle about a value and L value were better than those of the control group(P<0.05).The daily crude protein required for unit weight gain decreased by 1.7%,and the feed cost decreased by 7.1%.In summary,under the conditions of this study,downregulating the crude protein concentration in the early and middle growth diets significantly reduced the overall growth rate of yellow feathere broilers,but it could save weight gain feed costs and have a certain improvement effect on carcass quality and meat quality.

关 键 词：低蛋白日粮 黄羽肉鸡 生长性能 胴体品质 

分 类 号：S831.5[农业科学—畜牧学]