纳米硒对绵羊精饲料营养物质瘤胃降解率的影响

选用4只体质量为(40±2.0)kg,装有永久瘤胃瘘管的晋中绵羊,以羊草和混合精料为基础日粮,采用4×4拉丁方试验设计,研究日粮添加纳米硒(0,0.3,3,6 g/d)对绵羊精饲料营养物质瘤胃降解率的影响。结果表明,日粮添加纳米硒3 g/d的精饲料粗蛋白(CP)瘤胃降解率显著提高(P<0.05),日粮添加纳米硒6,0.3 g/d的精饲料粗蛋白(CP)瘤胃降解率与对照差异不显著(P>0.05);日粮添加纳米硒对精饲料干物质(DM)、有机物(OM)瘤胃降解率影响差异均不显著(P>0.05)。这表明日粮纳米硒的添加水平为3 g/d时对瘤胃发酵有显著促进作用,故纳米硒的适宜添加水平为3 g/d。

Impact of Nano-selenium on Sheep Rumen Degradability Rate of Concentrates Nutrition

Using four sheep with body weight of（40 ± 2.0） kg,fitted with permanent rumen fistula,fed with mixed concentrate-based diets,and using of 4×4 Latin square design to study the nano-selenium diet（0,0.3,3,6 g/d） of feed nutrients in sheep rumen degradation rate.The results show that： in 3 g/d group,concentrated feed crude protein（CP） ruminal degradation rate was significantly increased（P0.05）,in 6,0.3 g/d groups concentrated feed crude protein（CP） ruminal degradation rates showed no significant differences（P0.05） with that of the control group;diet nano-selenium showed no significant difference（P0.05） on dry matter of feed（DM）,organic matter（OM） and rumen degradability.It suggested that the added dietary nano-selenium at level of 3 g/d played a significant role to promote rumen fermentatio,so it was appropriate to add at level of 3 g/d.