摘要
通过对４８头杜洛克生长猪的饲养试验及６头阉公猪的代谢试验，探讨了１７％，１５％两种蛋白水平及０．８％、０．９５％和１．０５％三种赖氨酸水平的６种饲粮对杜洛克生长猪日增重、氮沉积和能量代谢的影响。结果表明，两种蛋白水平对增重影响差异不大（Ｐ＞０．０５），高蛋白时，以１．０５％的赖氨酸、赖蛋比６．２饲粮获得最好的增重和饲料利用率；低蛋白时，以０．９５％赖氨酸、赖蛋比６．３增重最好。尿Ｎ与日食Ｎ量呈极显著正相关（Ｐ＜０．０１）；６组饲粮Ｎ沉积量差异不显著（Ｐ＞０．０５）；但低蛋白饲粮的Ｎ沉积率和ＭＥ／ＤＥ值显著高于高蛋白饲粮（Ｐ＜０．０５）。
Feeding trial involving 48
Duroc growing pigs,metablism trial using 6 barrows were conducted to study the effects of six
diets containing two protein levels(17%、15%)and three ly-sine levels(0.8%、0.95%、1.05%)on
average daily gain,N-rentention and energy metablism dur-ing 27～60 kg live-weight range.
The results suggested that:live weigh gain was not significantly affected by two protein
levels(P>0.05).When pigs were fed 17% protein diets,the maximun growth rate and efficiency of
feed utilization were achieved at 1.05% lysine diet with lysine to pro-tein ratio 6.2;When pigs
were fed 15% protein diest,the performance tended to be a maximum at0.95% lysine with
lysin:protein ratio 6.3. There is a strong corelationship between urinary nitro- gen and
nitrogen intake (P<0. 01);N-rentention was not significantly affected by the six diets(P>0. 05),but
N-rentention efficiency and ME/DE of pigs receiving low protein diets were signifi-cantly greater
than those of pigs receiving high protein diets.
基金
国家和浙江省"八五"攻关课题
关键词
猪
杜洛克猪
生长
氨基酸
饲料
能量代谢
Duroc growing pigs
lysine protein
ratio
live weight gain
N-rententiOn
energy metablism.
