학술논문
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
Document Type
Academic Journal
Author
葛莹; 范京辉; 李庆海; 刘航; 王欢欢; 魏莹晖; 张雷; GE Ying; FAN Jinghui; LI Qinghai; LIU Hang; WANG Huanhuan; WEI Yinghui; ZHANG Lei
Source
浙江农业科学 / Journal of Zhejiang Agricultural Sciences. 65(2):454-458
Subject
Language
Chinese
ISSN
0528-9017
Abstract
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.
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.