脂肪酶对蛋鸡生产性能的影响试验

本试验旨在研究脂肪酶对蛋鸡生产性能的影响.试验采用单因子随机分组试验设计,选取9 600只370日龄的罗曼蛋鸡,随机分到2个处理组,每个处理组8个重复,每个重复600只鸡.基础饲粮采用玉米-豆粕型饲粮.试验组在对照组代谢能水平2.65 Mcal/kg基础上,减少油脂添加量而降低30 kcal/kg代谢能,同时添加200 mg/kg脂肪酶（其酶活5 000 U/g）.试验结果表明蛋鸡产蛋中后期（370日龄）,在饲粮代谢能水平降低30 kcal/kg的同时添加脂肪酶,可显著提高平均产蛋率（P＜0.05）,极显著地降低平均死亡率（P＜0.01）.

Effects of Feed Lipase on the Production Performance of Laying Hens

The objective of the present study was to investigate the effects of lipase on the production performance of laying hens. A single factorial randomized experimental design was adopted. 9600 370-day old Roman pink shell layers were randomly assigned to 2 treatment groups based on body weight with 8 replicate of 600 laying hens. The basal diet was the corn-soybean meal. Metabolic energy level of the control group was 2.65Mcal/kg. The experimental group was decreased 30kcal/kg metabolism by reducing the oil content and add the 200mg/kg lipase （enzyme activity of 5 000 U/kg）.The results showed that adding 1000U/kg lipase meanwhile decreasing 30kcal/kg metabolism of dietary energy level on the basis of ME2.65Mcal/kg of laying hens （370 days old） could significantly improve the average egg production rates （P〈0.05）, and significantly decrease the average mortality rates（P〈 0.01）.