中文摘要：

本试验旨在研究日粮添加不同水平维生素E对湖羊公羔生殖器官发育和血液生殖激素水平的影响。选择30只遗传背景一致,平均体重22.63±1.41 kg的3月龄湖羊公羔,随机分为3组,每组10只,单栏饲喂,自由饮水。日粮使用5：5精粗比,对照组每日仅饲喂基础日粮,试验组每日分别在基础日粮中添加200 IU和2 000 IU维生素E。试验期共120 d,其中预试期15 d,正试期105 d。正试期结束前全部试验动物颈静脉采血测定生殖激素水平,并测量阴囊长度和宽度;正试期结束后全部动物屠宰,取睾丸组织称重,并测定睾丸长度、宽度及围长,计算睾丸体积。结果发现：日粮添加维生素E显著提高湖羊公羔阴囊长度和宽度（P〈0.05）,有提高睾丸重和睾丸宽度的趋势（P〈0.01）,对睾丸长度、围长及体积影响不显著（P〉0.05）;各组试验动物血液生殖激素水平未随日粮维生素E的添加出现显著差异（P〉0.05）。本试验结果表明日粮添加维生素E能够促进湖羊公羔生殖器官的发育,但对血液生殖激素水平无显著影响（P〉0.05）。

英文摘要：

The current study was conducted to investigate the effects of dietary vitamin E supplementation on development of reproductive organs and serum reproductive hormone levels in Hu male lambs. A total of 30 animals which had same genetic background and similar body weight of22.63±1.41 kg were averagely divided into 3 groups. They were housed in individual pen and had free access to water. The basal diets consisted of 5：5 forage to concentrate ratio. Lambs in control group were only fed with basal diets, while in treatment groups 200 IU/d and 2 000 IU/d vitamin E were respectively added in diets. The experimental period lasted for 120 days, including a 15 days adaption for diets and environments. The blood samples were obtained from jugular vain of all animals to determine the reproductive hormone levels at the end of the experiment. The scrotum length and width of lambs were also measured at that time. Lambs were slaughtered after the experiment and testis tissues were taken out for weighing, followed by measurement of testicular length, width and girth and volume calculation. The results showed as follows, the scrotum length and width of Hu lambs in vitamin E added groups were significantly increased compared with control group. Dietary vitamin E supplementation tended to increase the testis weight and testicular width of Hu male lambs, but had no obvious effects on testicular length, girth and volume. No differences were observed in serum reproductive hormone levels of animals in all groups.It was concluded that dietary vitamin E supplementation could improve the development of reproductive organs in Hu male lambs, but had no significant effects on serum reproductive hormone levels.