【摘要】 本试验旨在研究玉米-豆粕饲粮下添加不同水平酵母硒对蛋鸡生产性能、血清生化指标及常规蛋品质的影响。试验选用1 000只280日龄的海兰褐壳蛋鸡,随机分为5组,每组5个重复,每个重复40只,分别为基础饲粮组、0.1、0.2、0.3和0.4mg/kg酵母硒添加水平组,试验期40d。结果发现,与对照组相比,饲粮添加0.3~0.4mg/kg酵母硒可显著提高产蛋率和平均蛋质量(P<0.05),并显著降低料蛋比和破蛋率(P<0.05);与对照组相比,饲粮添加0.3~0.4mg/kg酵母硒分别提高了血清总蛋白(P<0.05)和降低了血糖含量(P<0.05),各酵母硒添加组均显著提高了血清无机磷(P<0.05)和钙(P<0.05)水平,且以0.3mg/kg添加组钙、磷水平最高;与对照组相比,各试验组均可显著改善蛋壳强度、蛋白高度、哈氏单位和蛋黄颜色(P<0.05),且以0.3mg/kg酵母硒添加组蛋壳强度、蛋白高度和哈氏单位最高,但各试验组蛋形指数和蛋壳厚度与对照组差异不显著(P>0.05)。结果表明,蛋鸡饲粮中添加0.3mg/kg酵母硒效果最佳。更多还原

【Abstract】 The experiment was conducted to study the effect of yeast-Se on the production performance,serum parameters and egg quality of laying hens.1000 280-day-old laying hens were randomly divided into 5groups,Each group was assigned 5replications and 40 layers per replication.The control group fed with the corn-soybean meal based diets,and other experimental groups fed with the basic diets added with yeast-Se 0.1,0.2,0.3mg/kg and 0.4mg/kg for 40 days,respectively.The results showed that:the experiment groups added with 0.3and 0.4mg/kg yeastSe can significantly increase average laying rate and average egg weight(P<0.05),and meanwhile decrease the feed conversion ratio and broken egg rate(P<0.05);total protein and glucose of experimental groups with 0.3and 0.4mg/kg yeast-Se were significantly higher and lower respectively than those of the control group(P<0.05),and serum calcium and phosphorus of all the treated groups were significantly increased(P<0.05);eggshell strength,egg albumen height,Haugh unit and yolk color of an treated group were significantly higher those of the control group(P<0.05),and the highest figure of eggshell strength,egg albumen height and Haugh unit were achieved when 0.3 mg/kg yeast-Se was supplemented,there no significant difference was observed in the egg-shaped index and eggshell thickness among all the groups(P>0.05);In conclusion,yeast-Se at the dosage of 0.3mg/kg was better for laying hens.更多还原