关键词: VA; VD; VE; 烟酸; VB₁₂; VC

Abstract: Research advance of fat-soluble and water-soluble vitamins,vitamin A, vitamin D,vitamin E from 2007 to 2008 has been reviewed in this article. Vitamin A can improve the immune function of ruminants and impact on beef quality and the development of ruminant adipose tissues.Sources of vitamin A have various biological avtivities vitamin D3 whose absorption is better than vitamin D2,has the ability of raising the immunity of dairy cattle, and increase the density of 25(OH)D3 in the sera,which has some effects on the beef quality vitamin E can elevate the milk production, reduce the incidence of afterbirth, and other, and stimulate the development of reproductive organs, resulting in the improvement of beef quality. Niacin can not only alleviate the effects of heat stress on the performance of dairy cattle, but also reduce the concentrations of free fatty acids in plasma decressing the incidence of fatty liver. Vitamin B12 can promote glucose metabolism and enhance the vitality of new-born lambs. Cholinergic can improve the production, milk fat and protein and affect the reproductive performance of dairy cattle. Coated vitamin C has good ability to pass the rumen and can be more in the intestinal tract, which furtherly the absorption of vitamins by dairy cows.

Key words: vitamin A; vitamin D; vitamin E; niacin; vitamin B; vitamin C