The influence of p-carotene supplementation on post-partum disease and subsequent reproductive performance of dairy cows in China
The plasma β-carotene status of non lactating Holstein-Friesian cows in a commercial dairy was found to be deficient (mean 1.2 μg /ml). Subsequently three experiments were conducted to evaluate the influence of 300 and 500 mg β-carotene supplementation per cow per day commencing 21 days prior to expected calving date and continuing for 70 days after calving on reproductive performance and periparturient health. There were considerable fluctuations in plasma β-carotene concentrations in cows around the time of calving in both supplemented and unsupplemented animals. However plasma concentrations tended to decrease as calving approached and where at their lowest 10 days after calving. β-carotene supplements significantly decreased the incidence of retained placenta, mastitis and reduced the days from calving to first heat.
Holstein-Friesian β-carotene reproductive performance
S.B.Bian R.Elliott I.Immig D.F.Sun
College of Animal Science,Northwest Agriculture & Forestry University Yangling, Shaanxi, 712100, PR. DSM Nutritional Products Suite 6, 13 Princeton Street, Kenmore, Queensland, 4069, Australia DSM Nutritional Products Bldg.241/834, CH-4002 Basel, Switzerland
国际会议
The 7tb International Symposium on the Nutrition of Herbivores(ISNH-7)(第七届国际草食动物营养研讨会)
北京
英文
870-875
2007-09-16（万方平台首次上网日期，不代表论文的发表时间）