本试验旨在比较酵母硒和亚硒酸钠对蛋鸡生产性能、蛋品质和蛋硒含量的影响,以确定能够替代亚硒酸钠的酵母硒适宜使用量.试验选用30周龄体况良好、产蛋率接近的健康海兰褐蛋鸡360只,随机分成5个组,每组6个重复,每个重复12只.对照组饲喂基础饲粮(不额外添加硒源),试验组饲喂在基础饲粮中分别添加0.30 mg/kg硒的亚硒酸钠以及0.10、0.20和0.30 mg/kg硒的酵母硒(试验饲粮中实测硒含量分别为0.176、0.342、0.278、0.302、0.359 mg/kg).预试期14 d,正试期28 d.结果表明:1)各试验组产蛋率、平均蛋重、平均日产蛋重、平均日采食量、料蛋比和蛋品质与对照组相比较差异均不显著(P>0.05).2)亚硒酸钠组和酵母硒组蛋硒含量均显著高于对照组(P<0.05);酵母硒组蛋硒含量均显著高于亚硒酸钠组(P<0.05),并随酵母硒添加量的增加显著增加(P<0.05).由此可见,相对于亚硒酸钠,蛋鸡对酵母硒吸收和向鸡蛋中的转移效率更高;饲粮添加硒能显著提高蛋硒含量,且蛋硒含量随着酵母硒添加量的增加而增加;饲粮中添加0.10~0.30 mg/kg硒的酵母硒对蛋鸡生产性能和蛋品质无不良影响.

This experiment was conducted to compare the effects of sodium selenite and selenium yeast on performance, egg quality and egg selenium content of laying hens. Three hundred and sixty 30-week-old healthy Hy-Line Brown laying hens with a similar laying rate were randomly assigned to 5 groups with 6 replicates in each group and 12 laying hens per replicate. The control groups was fed a basal diet without adding selenium, while the diets of experimental groups were fed the basal diet supplemented with sodium selenite containing 0.30 mg/kg selenium and selenium yeast containing 0.10, 0.20 and 0.30 mg/kg selenium, respectively. The measured values of selenium content in experimental diets were 0.176, 0.342, 0.278, 0.302 and 0.359 mg/kg, respectively. Pre-trail period was 14 days and experimental period was 28 days. The results showed as follows: 1) there were no significant differences in the laying rate, average egg weight, average daily egg weight, average daily feed intake, ratio of feed to egg, and egg quality among the 5 groups (P>0.05). 2) Compared with the control group, the addition of sodium selenite and selenium yeast in the basal diet could significantly increase egg selenium content (P<0.05). The egg selenium content in the groups supplemented with selenium yeast was significantly higher than that in the group supplemented with sodium selenite (P<0.05). The egg selenium content increased significantly with the addition of selenium yeast increased (P<0.05). In conclusion, the selenium absorption and conversion rate of selenium yeast are significantly higher than those of sodium selenite. The addition of selenium in the diet can significantly increase egg selenium content and the egg selenium content increase significantly with the addition of selenium yeast increased. No harmful effect is found in performance and egg quality of laying hens feed with the diet supplemented with 0.10 to 0.30 mg/kg selenium yeast.