葡萄糖前体复合物对新产牛围产期营养代谢病、生产性能、血清离子及免疫指标的影响

Effect of glucose precursor complex on perinatal nutritional metabolic diseases,production performance,serum ions and immune indexes of new born cattle

试验旨在探究葡萄糖前体复合物对新产牛围产期营养代谢病、生产性能、血清离子及免疫指标的影响。选取6头健康、体况、体重及妊娠天数相近的青年荷斯坦奶牛,随机分为2组,每组3个重复,每个重复1头牛。对照组奶牛饲喂基础日粮,试验组奶牛饲喂基础日粮+350 g/(头·d)葡萄糖前体复合物。从产前28 d开始饲喂,预饲7 d,至产后30 d。结果显示,添加葡萄糖前体复合物、添加时间以及二者互作均对围产期新产牛血酮、血糖含量无显著影响(P>0.05)。不同时间对奶牛产奶量、乳糖、乳蛋白含量具有显著影响(P<0.05),对奶牛乳脂率具有极显著影响(P<0.01)。不同处理、不同时间对围产期新产牛血清钠离子含量具有显著影响(P<0.05)。不同时间对围产期新产牛血清钙离子含量具有极显著影响(P<0.01)。不同时间对围产期新产牛血清免疫球蛋白A(IgA)、免疫球蛋白M(IgM)、干扰素-γ(INF-γ)、白细胞介素-4(IL-4)含量具有显著影响(P<0.05)。研究表明,在围产期日粮中添加葡萄糖前体复合物能够显著提高新产牛乳糖含量,预防产后酮病、低血钙症,可以提高机体免疫力。

The aim of the experiment was to investigate the effect of glucose precursor complex on perinatal nutritional metabolic disease,production performance,serum ions and immune indexes of cattle.Six young Holstein cows with similar health,body condition,weight and gestation days were randomly divided into two groups with three replicates in each group and one cow in each replicate.Cows in control group were fed with a basic diet,and those in experimental group were fed with a basic diet supplemented with 350 g/(head·d)of glucose precursor complex.They were fed from 28 d prenatally and prefed for 7 d until 30 d postpartum.The results showed that the addition of glucose precursor complex,the addition time and the interaction between the two had no significant effect on content of blood ketone and blood glucose in perinatal new born cattle(P>0.05).Different time had significant effect on milk yield,lactose and milk protein content(P<0.05),and had extremely significant effect on milk fat percentage(P<0.01).Different treatments and different time had significant effect on serum sodium ion content of perinatal new born cattle(P<0.05).The content of serum calcium ion in perinatal neonates was significantly affected by different time(P<0.01).The content of IgA,IgM,INF-γand IL-4 in serum of perinatal new born cattle were significantly affected by different time(P<0.05).The study indicates that the addition of glucose precursor complex in perinatal diet can significantly increase the content of lactose,and prevent postpartum ketosis,hypocalcemia and improve body immunity.