植物甾醇对泌乳前期奶牛生产性能及血浆生化指标的影响

Effects on production performance and plasma biochemical index on early lactation dairy cows of phytosterol

本试验旨在研究添加不同剂量植物甾醇对泌乳前期荷斯坦奶牛生产性能及血浆生化指标的影响。选用泌乳期相近的健康荷斯坦奶牛24头,随机分成4组,每组6头,Ⅰ组为空白对照组,饲喂基础日粮,Ⅱ、Ⅲ、Ⅳ组分别在基础日粮中添加200、400和800 mg/d植物甾醇,研究不同添加量的植物甾醇对奶牛生产性能及血液生化指标的影响。结果表明:①各试验组血浆生化指标Ⅱ组变化最为明显。较Ⅰ组而言,Ⅱ组血浆雌激素、孕酮、催乳素、卵泡刺激素、黄体生成素、干扰素、白细胞介素2、高密度脂蛋白胆固醇均显著提高(P<0.05),丙二醛含量显著下降(P<0.05)。②较Ⅰ组而言,Ⅲ组血浆白细胞介素2、高密度脂蛋白胆固醇均显著提高(P<0.05)。③与Ⅰ组相比,Ⅳ组血浆甘油三酯含量明显下降(P<0.05),总超氧化物歧化酶显著提高(P<0.05)。添加植物甾醇可提高奶牛的泌乳量,改善奶牛内源激素不平衡的状况,并促进奶牛发情,改善奶牛脂类代谢情况,改善奶牛体质,其中200 mg/d植物甾醇添加量为最适添加量。

The experiment was conducted to study the effects of different phyt bioc osterol on early lactation Holstein dairy cows production performance an dose of d plasma hemical index. The 24 Holstein cows were divided into 4 groups randomly, 6 with similar lactation and health condition, group I was the control group fed each, with basal diet, II, III, IV group were added with 200, 400 and 800 mg/d of phytosterols into the basal diet, the effect of different amount of phytosterols on production performance and b] sults showed that ously. Compared wi ood biochemical indexes on dairy cows were then performed. The re- ① The plasma biochemical indexes of group II changed most obvi- th group I, the plasma estrogen, progesterone, prolactin, follicle stimulating hormone, luteinizing hormone, interferon, interleukin 2 and high densi- ty lipoprotein cholesterol of group II were significantly increased （P〈0. 05） and malondialdehyde content also decreased significantly （P〈0. 05）. Compared with group I, the plasma interleukin 2 and high density lipoprotein cholesterol of group III were significantly increased （P〈0. 05）. Compared with group I, the ide of group IV decreased significantly （P0.05） and total superox plasma triglycer- ide dismutase in- creased significantly （P〈：0. 05）. The addition of phytosterols can improve milk yield of dairy cows, keep endogenous hormone imbalanced, and promote oestrus of dairy cat- tle, improve lipid metabolism of dairy cows, improve the physique, where 200 mg/d phytosterol addition amount is the most suitable amount.