脂肪粉对蛋鸡生产性能及相关理化指标的影响

为探讨饲料中添加脂肪对蛋鸡生产性能的影响，选择300日龄褐壳蛋鸡720只，随机分为3个处理，每个处理分为6个重复；试验组分别添加1％、2％脂肪粉，观测其对蛋鸡生产性能、生理变化及经济效益的影响。结果表明：添加脂肪，可以明显提高（P〈0．05）蛋鸡产蛋率（3．51～5．23％）和蛋重（6．03～8．69％），降低采食量（3．63～3．67％），改善饲料报酬（13．08～16．03％）；生理指标检测结果显示，试验组血清T3、T4含量显著提高（P〈0．05），并且有提高GH、IGF－1含量趋势（P〉0．05）；综合经济效益分析，添加脂肪可以提高蛋鸡养殖效益（16．67～26．98％）。因此，杂粕型蛋鸡饲料中添加脂肪有实际意义。

Effect of fat on performance and biochemistry index in laying hens

To study the effect of fat on performance in laying hens, seven hundreds and twenty 300-days old laying hens were selected and divided into 3 groups with 6 replications randomly. 1% and 2% fat were mixed into the diet of the trail respectively and the performance, metabolic index were determined and benefit were calculated. The results showed that： ① The laying percentage and egg weight of trail groups increase by 3.51- 5.23% and 6.03-8.69% respectively, feed intake decreased by 3.63-3.67% and feed conversion ratio decreased by 13.08- 16.03% （P 〈0.05）; ② The T3, T4, GH, IGF-1 level of trail groups was higher than the control groups. ③ Compared with control, the benefits of groups with fat increased by 16.67 -26.98%. Therefore, fat into low ME laying hen diets is practical significance.