饲料蛋白水平对蛋鸡生产性能的影响

Effect of Feed Crude Protein Level on Layer Growth Performance

饲料营养水平对鸡的生产性能影响很大,特别是蛋白质及氨基酸的平衡,能有效降低鸡的非生产费用和增加养鸡效益。在蛋鸡育成期按饲料蛋白质含量分为低(13%),中(15%),高(16%)三个水平组,至开产前恢复正常蛋白水平(16.5%),进行全期饲养对比试验。结果表明,试验鸡生长发育正常,各项指标基本达到品种标准,至145 d平均体重范围在1312.5～1428.9g;305d平均产蛋率为70.9%～73.15%,和对照组相比,试验组体重和体尺及产蛋率差异均不显著(P>0.05)。经统计,试验一组比对照组料价每kg低12%,差异显著(P<0.05)。因此,采用科学合理的配料方法,在育成期降低日粮蛋白质水平,不影响育成鸡生长发育和成年鸡生产性能。

Feed nutrition level influence evidently on layer growth performance, especially of crude protein and amino acid balance, which can effectively reduce production and increase profit. In layer growing phase, three CP levels were used 13% ,15% and 16%, until laying eggs recovered to normal CP level（ 16.5% ）, comparison experiment was carried out during whole period. The resuits showed that experimental layers grew normally, indexes researched variety standard, average body weight was 1 312. 5 g - 1 428.9 g, average egg laying rate was 70.9% ~73.15% , body weight , body size and laying rate was nonsignificant different compared with control group （P 〉 0.05 ）. Feed price of experimental group was 12%, which was lower than control group （P 〈 0.05 ）. Therefore, science reasonable feed formulation, that is to say, lowering dietary CP level in growing phase, which did not influence growth performance of grower chicken and growth performance of adult layers.