添加不同浓度过瘤胃脂肪对奶牛产后MUN、NEFA、BHBA及繁殖的影响

通过对产后高产奶牛添加不同浓度的过瘤胃脂肪,研究过瘤胃脂肪对奶牛产后MUN、NEFA、BHBA及繁殖的影响.结果表明,添加200 g和400 g过瘤胃脂肪都能在一定程度上降低产后泌乳高峰期MUN、NEFA、BHBA的浓度,与空白对照组比较差异显著,后者略好于前者;另外添加400 g过瘤胃脂肪组奶牛产后平均配种次数显著低于对照组(1.4±0.35 VS 2.1±0.28),奶牛空怀间隔也显著低于对照组(102±22.5 VS 126±23.6),产后情期受胎率和100 d受胎率明显高于对照组.可见,添加一定量的过瘤胃脂肪在一定程度能够降低高产奶牛产后MUN、NEFA、BHBA的浓度,提高了产后奶牛的繁殖性能.

Effects of adding different concentrations of undegradable fatty on MUN, NEFA, BHBA and reproduction in postpartum cows

The paper investigated the effects of adding different concentrations of undegradable fatty on MUN, NEFA,BHBA and reproduction on postpartum cows with high yield. The results showed that adding 200 g and 400g undegradable fatty could reduce the concentration of MUN, NEFA and BHBA during postpartum lactation peak, the difference was significant compared with the control, and the latter was slightly better than the former. In addition, the mean number of services and the calving to conception interval were significantly lower than those of control group (1.4±0.35 VS 2.1±0.28; 102±22.5 VS 126±23.6), and while conception rate of first service or conception rate of postnatal 100 days were obviously higher than those of control group by adding 400 g undegradable fatty after calving. So adding certain amount of undegradable fatty could reduce partly the concentration of MUN, NEFA and BHBA, and improve the reproductive performance in postpartum cows.