【摘要】 选取48周龄的尼克红商品蛋鸡720只,随机分为5组(A-E),每组4次重复,每重复36只鸡,A 组饲喂玉米-豆粕型日粮,不加复合酶制剂;另外4组(B-E)饲喂玉米-杂粕型(棉粕、菜粕和花生粕)日粮(依次分别添加0％,0．05％,0．10％和0．15％复合酶制剂),研究不同水平复合酶制剂对采食玉米-杂粕型日粮蛋鸡的生产性能、蛋品质等常规指标及养分利用率的影响,正试期63 d。结果表明,在蛋鸡玉米-杂粕型日粮中添加复合酶制剂,可降低饲料生产成本,提高养殖经济效益;0．10％复合酶制剂的添加水平效果最佳,与不添加的B组相比,产蛋率极显著提高(P<0．01);平均蛋重显著提高(P<0．05);料蛋比显著降低(P<0．05);能量利用率极显著提高(P< 0．01);粗蛋白表观利用率显著提高(P<0．05)。更多还原

【Abstract】 The study was conducted to evaluated the effect of enzyme mixture (EX) on egg performance,egg quality and nutrient utilization of layers in corn-cottonseed ,cottonseed .rapeseed and peanutseed based diets. 720 Nike laying hens were randomly assigned to five groups (A ,B,C, D,E) ,each of 4 replicates and 36 hens per replicate. Group A was fed core-soybean based diet,another four treated groups were fed corn, cottonseed, rapeseed and peanut-seed based diet with different level EX. The supplementation levels were 0% ,0. 05%,0. 10%,0. 15% .respectively,to group B,C,D and E. The trial lasted 8 weeks with the following results : Group D was the best with higher laying rate(P<0. 01), higher average egg weight (P<0. 05) and lower feed conversation ratio (P<0. 05) than group B,and Group D increased EUR (P< 0. 01) with higher apparent protein digestibility (APE).更多还原