【摘要】 本试验研究日粮补充β-胡萝卜素对奶牛血液β-胡萝卜素浓度、产后发病率、产后70天内的配种率、受胎率及一次配种受胎率的影响。结果表明:添加300mg/头·天的β-胡萝卜素能显著提高奶牛产前7天、产后10天和产后60天的血液β-胡萝卜素浓度(p<0.05),降低产后胎衣不下和乳腺炎的发病率,提高产后70天内的配种率和配种受胎率,但对一次配种受胎率和配种天数无明显影响。更多还原

【Abstract】 A field trial was conducted to evaluate the effects of beta-carotene supplementation (300mg/head/day) on serum concentration of beta-carotene, postpartum disease and reproduction. 76 dairy cows from Guangzhou Zhujiang Dairy Company were included in this trial. Results indicated that beta-carotene treatment enhanced the serum concentration of beta-carotene of 7 days peripartum and 10 and 60 days postpartum. Comparing to control group, the retention of placenta and mastitis of treatment group was lower. The time of first AI was not influenced by beta-carotene supplementation. The conception rate and AI rate of postpartum 70 days was enhanced by beta-carotene treatment, however, the conception rate of one-time AI was not influenced. The result indicated supplementation of beta-carotene may improve reproduction performance of cows.更多还原