饲粮中添加生物活性硒对蛋鸡生产性能、蛋品质和蛋黄中硒含量的影响

Effects of dietary supplementation of bioactive selenium on performance,egg quality and selenium content in the egg yolk of laying hens

选用体质量、产蛋率相近,健康的罗曼灰商品蛋鸡作为试验对象,对照组饲喂基础饲粮,试验组饲喂在基础饲粮中分别添加0.6%、0.8%和1.0%生物活性硒的饲粮,预饲期7 d,正式试验35 d,旨在探讨饲粮中添加不同水平生物活性硒对蛋鸡生产性能、蛋品质和蛋黄中硒含量的影响。结果表明:1)与对照组相比,添加0.6%~1.0%生物活性硒对蛋鸡生产性能无显著影响(P>0.05)。2)饲粮中添加生物活性硒对鸡蛋蛋壳厚度、蛋壳强度、蛋黄质量及哈氏单位均无显著影响(P>0.05),但在试验7和21 d时,总体来看,添加0.6%~1.0%生物活性硒可提高鸡蛋浓蛋白高度,在28 d时可显著提高蛋黄比率(P<0.05)。3)蛋黄中硒含量随饲粮生物活性硒添加水平的增加而升高(P<0.05)。综上所述,饲粮中添加生物活性硒对蛋鸡生产性能无显著影响,但可在一定程度上提高产蛋率,改善蛋品质,显著提高蛋黄中硒的含量。

This study was designed to evaluate the effects of bioactive selenium on performance,egg quality and selenium content in the egg yolk of laying hens.The healthy Roman grey laying hens with similar body mass and laying rate were selected as the testing objects.All hens were fed with corn-soybean meal-based diets for 7 d and then assigned to corn-soybean meal-based diets containing 0(as the control group),0.6%,0.8%,and 1.0%bioactive selenium for 35 d,respectively.The results showed that:1)When compared with the control group,there were no significant differences in production performance as dietary bioactive selenium contents increasing from 0.6%to 1.0%(P>0.05).2)When compared with the control group,no remarkable differences in eggshell thickness,eggshell strength,egg yolk mass and Haugh unit were observed among all the bioactive seleniumadded groups(P>0.05).In general,the thick albumen height increased in the 0.6%to 1.0%bioactive selenium groups on 7 and 21 d.Meanwhile,a significant increase of yolk percentage in bioactive selenium groups was observed relative to the control group on 28 d(P<0.05).3)The selenium content in the egg yolk increased linearly with the increase of dietary bioactive selenium contents(P<0.05).In conclusion,dietary bioactive selenium has no significant effect on laying hen’s performance,but to some extent,it can improve the laying rate,egg quality and increase the selenium content in yolk.