摘要
选同日龄海兰白雏鸡620只,随机分为3个组,每组4个重复。1、2、3处理组日粮营养水平依次为育雏期(0~8周龄)粗蛋白18%、20%、21%,代谢能11.93、11.93、12.56MJ/kg;育成期(9~20周龄)粗蛋白17%、18%、19%,代谢能11.72、11.93、12.14MJ/kg。试验结果表明:育雏期试验鸡增重和结束体重均随日粮营养水平的提高而增加,以处理3组增重效果最好,分别比1、2处理组提高增重3.82%和3.19%;能量水平相同、蛋白质水平不同的1、2处理组间增重及8周龄体重基本一致。育成期20周龄和结束体重不同营养水平间比较接近。全期单鸡耗料3个处理组间以处理3组最低,单位增重蛋白质消耗量随营养水平的提高而增加,能量的消耗则比较接近。综合分析育雏期以处理3组、育成期以处理2组饲养效果较好。
620 hy-line white laying hens were randomly divided into 3 groups and there were 4 replicates each.Dietary crude protein (CP) and metabolizable energy (ME) of group 123 were 18%11.93MJ/kg20%11.93 MJ/kg21%12.56 MJ/kg respectively during starting period(0~8wk) and were 17%11.72 MJ/kg18%11.93 MJ/kg19%12.14 MJ/kg respectively during growing period (9~20wk).The results indicated thatThe weight gain and body weight at the end of starting period increased with the increasing nutrition level.The weight gain of group 3 was the biggest and was higher 3.82% than group 1higher 3.19% than group 2 at the end of starting period.The weight gain and body weight of group 1 at 8 wk of age had no significant deference from that of group 2.Body weight at 20 wk of age had no significance deference among groups.During testfeed intake of group 3 was the lowestCP consumption per unit weight gain increased with the increasing the nutrition contentbut ME consumption had no significant change.We can concluded that the nutrition level of group 3 was best during the staring period and that of group 2 was best during growing period.
出处
《山东家禽》
2001年第5期3-5,共3页
Shandong Poultry
关键词
海兰白蛋鸡
营养水平
育雏
育成
增重
效益
hy-ling white layerdifferent nutrition levelstarting periodgrowing period