不同蛋氨酸、赖氨酸水平对育肥蛋公雏饲养效果的影响

Influences of diet with different methionine and lysine levels on the feeding results of fattening egg－type cockerels

在玉米－豆粕型饲粮中分别添加不同量的蛋氨酸和赖氨酸，探讨其对育肥蛋公雏饲养效果的影响。结果表明：两组试验鸡的成活率相近，说明饲粮中不同的蛋氨酸、赖氨酸水平对鸡只健康无影响。虽然前后期两组鸡的日增重无显著差异（P>0.05），但蛋氨酸和赖氨酸水平较高的I组前期和后期分别比II组提高了1％和3.29％，即高蛋氨酸、赖氨酸水平对日增重有正的影响。饲料报酬与日增重基本一致，前后期I组比II组分别提高了1.79％和6.11％。毛盈利I组比II组高3.44％，从经济效益方面分析，高蛋氨酸、赖氨酸水平对育肥蛋公雏饲养效果有正的影响。

To study the influence on the fattening results of egg－type cockerels,two different levels of Methionine and Lysine were added to corn－soybean meal type rations(group I:the higher level of methionine and Lysine,groupⅡ：the lower level of methionine and Lysine).The results showed survival rate of the two groups were similar,i.e.the different levels of Methionine and Lysine had no influence on cockerel health.Though daily gain of the two groups had no significant difference during the whole period(P>0.05)，daily gain of group I increased by 1％and 3.29％over group Ⅱin former and latter periods respectively,i.e.the higher level of Methionine and Lysine had positive effect on daily gain.It is the same with daily gain,feed conversion ratio of group I increased by 1.79％and 6.11％over groupⅡin former and latter periods respectively.Gross profit of group Ⅰincreased by 3.44％over group Ⅱ.According to economic benefit ,the higher level of Methionine and Lysine had positive effect on the fattening results of egg－type cockerels.