Effect of supplemental beta-carotene in the periparturient diet on plasma vitamin A and beta-carotene concentrations and lymphocyte proliferation in Holstein cows
文献类型: 外文期刊
作者: He, W. J.;Ren, L. P.;Meng, Q. X.;He, W. J.;Ren, L. P.;Meng, Q. X.;Zhang, Q. D.
作者机构:
关键词: beta-carotene;plasma;lymphocyte proliferation;cows
期刊名称: JOURNAL OF ANIMAL AND FEED SCIENCES
ISSN: 1230-1388
年卷期: 2007 年 16 卷
页码:
收录情况: SCI
摘要: Thirty six lactating Holstein cows were selected based on identical parity, milk yield, body weight and body condition score to study the effect of supplemental beta-carotene in the periparturient diet on plasma vitamin A (VA) and beta-carotene concentrations and lymphocyte proliferation. The cows were randomly allotted into three groups and individually fed with one of three treatment diets: 1. control diet (basic diet + 150,000 IU VA/cow/day), 2. control diet + 300 mg beta-carotene/cow/day, and 3. control diet + 600 mg beta-carotene/cow/day. The results showed that supplemental beta-carotene increased the concentration of VA and beta-carotene in plasma, and increased the lymphocyte proliferation with adequate VA in the diet during periparturient period (P<0.01).
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