不同类型低蛋白日粮对蛋鸡生产性能、蛋品质及血清生化指标的影响

Effect of different types of low protein diets on production performance,egg quality and serum biochemical indexes of laying hens

试验研究以可消化氨基酸为基础的不同类型低蛋白日粮对蛋鸡生产性能、蛋品质、养分表观消化率及血清生化指标的影响。试验选取648只鸡,随机分为9组,每组6个重复,每个重复12只鸡,采用3×3双因素设计。日粮类型为玉米-豆粕型、玉米-豆粕-棉粕型、玉米-豆粕-花生粕型,蛋白水平为16.4%、14.4%、12.4%。结果显示:降低日粮蛋白水平对生产性能、蛋品质、养分表观消化率、血清总蛋白、尿素氮、尿酸含量均无显著影响(P>0.05)。玉米-豆粕-棉粕型及玉米-豆粕-花生粕型日粮对生产性能、蛋品质、表观消化率及血清生化指标均无显著影响(P>0.05)。日粮类型和蛋白水平的交互作用对蛋品质及营养物质表观消化率无显著影响(P>0.05)。除4组、5组外,各试验组经济效益均高于对照组。研究表明,玉米-豆粕型+12.4%蛋白水平、玉米-豆粕-棉粕型+16.4%蛋白水平、玉米-豆粕-花生粕型+14.4%蛋白水平组为适配组。

The effect of different types of low protein diets based on digestible amino acids on laying performance, egg quality, apparent nutrient digestibility and serum biochemical indexes were studied. 648 chickens were randomly divided into nine groups, with six replicates in each group and 12 chickens in each replicate, and 3 × 3 two factor design was adopted. The diet types were corn-soybean meal, corn-soybean meal-cotton meal and corn-soybean-peanut meal diets,and the protein levels were 16.4%, 14.4% and 12.4%. The results showed that reducing dietary protein level had no significant effect on production performance, egg quality, apparent nutrient digestibility, serum total protein, urea nitrogen and uric acid content(P>0.05). Corn-soybean-cotton meal and corn-soybean-peanut meal diets had no significant effect on production performance, egg quality, apparent digestibility and serum biochemical indexes(P>0.05). The interaction of diet type and protein level had no significant effect on egg quality and apparent digestibility of nutrients(P>0.05). Except for group 4 and group 5, the economic benefits of each experimental group were higher than those of the control group.The experiment indicates that the adaptive group are corn-soybean meal + protein level of 12.4%, corn-soybean mealcotton meal + protein level of 16.4%, corn-soybean meal-peanut meal + protein level of 14.4%.