摘要
试验研究了β-胡萝卜素及其复合添加剂对牛奶体细胞数、牛奶成分、产奶量以及奶牛繁殖性能的影响。选择胎次相同、产奶量、体重和体况评分值相近的中国荷斯坦奶牛60头,随机分为4组。4组处理分别为:对照组不使用添加剂、试验Ⅰ组添加β-胡萝卜素600mg/(头·d)、试验Ⅱ组添加β-胡萝卜素300mg/(头·d)+VE1000IU/(头·d)、试验Ⅲ组添加β-胡萝卜素300mg/(头·d)+VE1000IU/(头·d)+蛋氨酸锌360mg/(kg·d)。预试期10d,试验期60d。结果表明,在奶牛日粮中添加β-胡萝卜素及其复合物,均能提高产奶量、改善乳品质量以及提高奶牛繁殖性能,复合添加VE和蛋氨酸锌1种或2种,能显著改善奶牛繁殖性能。因此,通过营养调控手段在改善围产期和泌乳早期奶牛能量负平衡的基础上,额外补充与繁殖、免疫功能密切相关的β-胡萝卜素以及其复合添加剂能有效改善奶牛繁殖功能,增强奶牛免疫能力,提高其生产性能。
The aim of this study to investigate the effects of beta-carotene and its compound additives on somatic cell count in milk,milk composition,milk yield,and reproductive performance of dairy cows.A total of 60 Chinese Holstein cows were selected.They were at the same parity and had close milk yield,body weight,and score of body condition.They were assigned randomly into four groups.The cows in the control group were fed with diet not supplemented any feed additive.The cows in the group I were fed with diet supplemented beta-carotene (600 mg/d for each cow).The cows in the group II were fed with diet supplemented beta-carotene (600 mg/d for each cow) and vitamin E (1 000 IU/d for each cow).The cows in the group III were fed with diet supplemented beta-carotene (600 mg/d for each cow),vitamin E (1 000 IU/d for each cow) and zinc methionine (360 mg/d for each kg).The trial period was 60 d,following a 10 d pre-trial period.The results showed that the diets supplemented beta-carotene and its compound additives increased milk yield,improved milk quality,and enhanced the reproductive performance of dairy cows.The beta-carotene compound additives containing vitamin E and/or zinc methionine greatly enhanced the reproductive performance of dairy cows.Therefore,in addition to nutritional regulation used to improve negative energy balance of dairy cows at perinatal stage or in early lactation period,supplementation of betacarotene and its compound additives that are closely related to reproduction and immunity can effectively enhance the reproductive performance,immunity and production performance of dairy cows.
出处
《畜牧与饲料科学》
2010年第3期17-19,共3页
Animal Husbandry and Feed Science
关键词
Β-胡萝卜素
VE
蛋氨酸锌
体细胞数
产奶量
乳成分
繁殖性能
beta-carotene
vitamin E
zinc methionine
somatic cell count
milk yield
milk composition
reproductive performance