枸杞多糖对奶牛生产性能、瘤胃发酵参数、血清抗氧化及免疫能力的影响

Effects of Lycium barbarum polysaccharides on production performance,rumen fermentation parameters,antioxidant capacity,and immune capacity of dairy cows

文章旨在研究枸杞多糖对奶牛生产性能、瘤胃发酵参数、抗氧化及免疫能力的影响。试验采用抽签法将80头身体健康、年龄和胎次相近、产奶量(29±1.00)kg/d的荷斯坦奶牛均分成4组,分别为对照组(基础日粮)、试验Ⅰ组(基础日粮+0.3%枸杞多糖)、试验Ⅱ组(基础日粮+0.6%枸杞多糖)和试验Ⅲ组(基础日粮+0.9%枸杞多糖),每组4个重复,每个重复5头奶牛,试验为期84 d。结果显示:与对照组相比,试验Ⅰ、Ⅱ、Ⅲ组奶牛的平均日采食量和平均日产奶量显著升高(P<0.05),料奶比显著降低(P<0.05),瘤胃发酵参数中的氨态氮和总挥发性脂肪酸含量、颈静脉血血清中的总抗氧化能力(T-AOC)、超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)、免疫球蛋白A(IgA)、免疫球蛋白G(IgG)和免疫球蛋白M(IgM)含量显著升高(P<0.05),颈静脉血血清中的丙二醛(MDA)含量显著降低(P<0.05)。以上结果表明,在基础日粮中添加枸杞多糖不仅能显著改善奶牛的生产性能和瘤胃发酵参数,还可以显著提高奶牛机体的抗氧化能力和免疫能力,在本试验条件下,在基础日粮中添加0.6%的枸杞多糖作用效果最优。

To explore the effects of goji berry polysaccharides on the production performance,rumen fermentation parameters,antioxidant capacity,and immune capacity of dairy cows.This experiment used a lottery method to divide 80 healthy Holstein cows with similar age and parity,and a milk production of(29±1.00)kg/d,into four groups:control group(basic diet),experimental group I(basic diet+0.3%goji berry polysaccharides),experimental group II(basic diet+0.6%goji berry polysaccharides),and experimental group III(basic diet+0.9%goji berry polysaccharides).Each group had four replicates,with five cows per replicate,and the experimental period was 84 days.The results showed that compared with the control group,the average daily feed intake and milk production of cows in Experiment I,Experiment II,and Experiment III groups were significantly increased(P<0.05);The feed to milk ratio of cows in Experiment I,II,III groups significantly decreased;The content of ammonia nitrogen and total volatile fatty acids in the rumen fermentation parameters of cows in Experiment I,Experiment II,and Experiment III groups significantly increased;The levels of T-AOC,SOD,GSH-Px,IgA,IgG,and IgM in the jugular blood serum of cows in Experiment I,Experiment II,and Experiment III groups were significantly increased;The MDA content in the jugular blood serum of cows in Experiment I,Experiment II,and Experiment III groups significantly decreased.The above results indicate that adding goji berry polysaccharides to the basic diet can not only significantly improve the production performance and rumen fermentation parameters of cows,but also significantly enhance their antioxidant and immune abilities.Among them,adding 0.6%goji berry polysaccharides to the basic diet has the best effect.