日粮添加不同比例的中短链和长链脂肪酸对奶牛免疫功能的影响

Abstract

Abstract: The objective of this study was to investigate the effects of supplementing different ratios of short-medium chain fatty acids (SMCFA) and long chain fatty acids (LCFA) on the immune function in mid-lactating dairy cows. Seventy-two Chinese Holstein cows were blocked by the milk yield, lactation day age and parity, and then assigned to six groups. The animals were fed 0 g/d, 400 g/d LCFA, 80 g/d SMCFA, 320 g/d LCFA, 400 g/d butter fat, 240 g/d SMCFA and 160 g/d LCFA and 400 g/d SMCFA respectively on the basis of ordinary diets for the control, group A and group B,group C, group D and group E. The experiment lasted 63 days and on the last day, blood samples were collected to determine the concentrations of serum immunoglobulin IgA, IgG, IgM, prostaglandin E₂(PGE₂) and cytokines. The results showed that among all the groups, IgM and PGE₂ were not affected by supplementing fatty acids (P＞0.05). The concentrations of IgA in group A was higher than that in groups B and E and the concentrations of IgG in groups B and D were higher than the other four groups(P＜0.05). Interleukin-4 and 10 increased after supplementing fatty acids, especially in group D(P＜0.01). In conclusion, supplementing fatty acids which consisted of 240 g/d SMCFA and 160 g/d LCFA could improve the immune functions in mid-lactating dairy cows well.

Key words: dairy cows; fatty acids; immune function

CLC Number:

S823

XU Xiao-yan, BU Deng-pan, SUN Peng, CUI Hai, ZHAO Xiao-wei, SUN Yan, ZHAO Guo-qi. Effects of Supplementing Different Ratios of Short-medium Chain Fatty Acids and Long Chain Fatty Acids on the Immune Function in Mid-lactating Dairy Cows[J]. , 2012, 39(10): 108-112.

References

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Effects of Supplementing Different Ratios of Short-medium Chain Fatty Acids and Long Chain Fatty Acids on the Immune Function in Mid-lactating Dairy Cows

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