摘要
本试验旨在研究饲粮营养水平对黄羽肉鸡生长性能、肉品质和性成熟的影响。采用单因子完全随机设计,将432只1日龄商品代北京油鸡随机分配到高、中和低3种营养水平组,每组4个重复,每个重复36只鸡,自由采食、饮水。饲粮按中速黄羽肉鸡的饲养标准分为3个阶段（1-5周、6-9周和10-13周）,每个阶段在保持蛋白质与能量比值不变的情况下分别设置高、中和低3种营养水平。结果表明,1-5周,低营养水平组肉鸡的平均日采食量和平均日增重极显著低于中、高营养水平组（P〈0.01）;中营养水平组的平均日增重显著高于低营养水平组（P〈0.05）,料重比显著低于低营养水平组（P〈0.05）。饲粮营养水平对肉品质未表现出显著影响（P〉0.05）。高营养水平组母鸡鸡冠重和鸡冠长度极显著高于中、低营养水平组（P〈0.01）,鸡冠高度显著高于中、低营养水平组（P〈0.05）,高营养水平组有促进卵巢重的趋势（P=0.08）。饲粮营养水平对公鸡性成熟指标未表现出显著影响（P〉0.05）。由此可见,对于中速型黄羽肉鸡,中营养水平的饲粮能获得较好的生长性能,高营养水平的饲粮能促进母鸡性成熟。
The aim of the present study was to investigate the effects of dietary nutrient level on growth performance,meat quality and sexual maturity of yellow-feathered chickens. Using the completely randomized design,a total of 432 one-day-old Beijing-You chicks were allocated to three nutrient level groups [high（ H）,middle（ M） and low（ L） nutrient levels]. For each group,there were 4 replicates of 36 birds each. Feed and water were provided ad libitum. According to the feeding standard of medium-speed yellow-feathered chickens,three growth stages（ 1 to 5 weeks,6 to 9 weeks and 10 to 13 weeks） were set up. The three diets had the same ratio of crude protein（ CP） to energy at the H,M and L nutrient levels. The results showed that at 1 to5 weeks,the average daily feed intake（ ADFI） and average daily gain（ ADG） in L nutrient level group were significantly lower than those in M and H nutrient level groups（ P〈0.01）; the ADG in M nutrient level group was significantly higher than that in L nutrient level group（ P〈0. 05）,and the feed to gain was significantly lower than that in L nutrient level group（ P〈0. 05）. Dietary nutrient levels had no significant effect on meat quality（ P〈0.05）. The comb weight and comb length in H nutrient level group were significantly higher than those in M and L nutrient level groups（ P〉0.01）,and the comb height was significantly higher than that in M and L nutrient level groups（ P〈0.05）. H nutrient level group had a tendency to increase the ovary weight（ P =0. 08）. Dietary nutrient levels had no significant effect on sexual maturity of the cocks（ P〉0.05）. It is concluded that the M nutrient level can get the better growth performance for medium-speed yellow-feathered chickens. The H level can promote the sexual maturity of the hens.
出处
《动物营养学报》
CAS
CSCD
北大核心
2016年第1期217-223,共7页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
现代农业产业技术体系建设专项资金项目(CARS-42)
中国农业科学院科技创新工程(ASTIP-IAS04)
关键词
北京油鸡
营养水平
生长性能
肉品质
性成熟
Beijing-You chickens
nutrient level
growth performance
meat quality
sexual maturity
