蛋氨酸羟基类似物异丙酯对奶牛产奶性能和血清生化指标的影响

发布时间：2018-01-20 18:05

本文关键词： 奶牛蛋氨酸羟基类似物异丙酯(HMBi) 围产期生产性能血清生化指标　出处：《福建农林大学学报(自然科学版)》2017年01期 　论文类型：期刊论文

【摘要】：选择24头健康荷斯坦奶牛进行配对,随机分为两组,每组12头.对照组仅饲喂基础日粮,试验组在饲喂基础日粮的同时,从产前21 d开始在日粮中添加20 g·d-1蛋氨酸羟基类似物异丙酯(HMBi),产后添加量根据配方设定为30 g·d-1.结果表明:与对照组相比,试验组奶牛每天的产奶量提高了6.83 kg(P0.05),牛奶中的乳蛋白率升高了0.14个百分点(P0.05),体细胞数下降了26.80万个·m L-1(P0.01).产前14 d时,试验组奶牛血清中的球蛋白含量和尿素氮浓度升高,免疫球蛋白G(IgG)含量降低(P0.05);产后14 d时,试验组血清中的总胆固醇浓度降低(P0.01);产后70 d时,试验组奶牛血清中的总胆固醇浓度也降低(P0.05).结论:在日粮中添加HMBi可以提高奶牛的产奶量,改善血清生化指标,促进机体的脂代谢;同时提高牛奶的乳蛋白含量,有效降低体细胞数.
[Abstract]:Twenty-four healthy Holstein cows were selected and randomly divided into two groups, 12 in each group. The control group was fed only basic diet, while the experimental group was fed the basal diet at the same time. 20 g 路d -1 methionine hydroxyl analogue isopropyl ester (HMBi) was added to the diet 21 days before birth. The postpartum dosage was set at 30 g 路d ~ (-1). The results showed that compared with the control group, the milk yield of the experimental group was increased by 6.83 kg / d (P 0.05). The milk protein percentage increased by 0.14% (P0.05%), and the somatic cell count decreased by 26.8 000 路mL ~ (-1) ~ (-1) (P ~ (0.01)). In the test group, the content of serum globulin and urea nitrogen increased, while the content of immunoglobulin G (GG) decreased (P 0.05). On the 14th day postpartum, the serum total cholesterol concentration in the experimental group decreased P0.01C; At 70 days postpartum, the concentration of total cholesterol in serum of the experimental group also decreased P0.050.Conclusion: adding HMBi to the diet can increase the milk yield and improve the biochemical index of serum. Promoting lipid metabolism; At the same time, increase milk protein content, effectively reduce the number of somatic cells.
【作者单位】：南京农业大学动物科技学院;伊犁州畜禽改良站;
【基金】：“十二五”国家科技计划项目(2012BAD12B10)
【分类号】：S823.5
【正文快照】： 围产期是奶牛饲养管理的重要阶段,这一时期的奶牛要经历多次日粮的转换及产犊、泌乳等重大生理转变.这一系列的饲料及生理状态的改变,使得奶牛的采食量降低,机体处于能量负平衡状态,血液中非酯化脂肪酸水平升高,容易诱发脂肪肝和奶牛酮病.围产期奶牛的健康状况会直接影响产后

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