Substitution of fresh forage ramie for alfalfa hay in diets affects production performance, milk composition, and serum parameters of dairy cows

文献类型： 外文期刊

第一作者： Dai, Qiuzhong

作者： Dai, Qiuzhong;Hou, Zhenping;Wu, Duanqin;Dai, Qiuzhong;Gao, Shuai;Li, Zhicai;Wei, Zhongshan

作者机构：

关键词： Holstein cow; Milk composition; Production performance; Ramie; Serum

期刊名称：TROPICAL ANIMAL HEALTH AND PRODUCTION （ 影响因子：1.559； 五年影响因子：1.681 ）

ISSN： 0049-4747

年卷期： 2019 年 51 卷 2 期

页码：

收录情况： SCI

摘要： We hypothesized that ramie, Boehmeria nivea (a nettle native to Asia), can be used as a high-quality forage to replace alfalfa hay in diets of dairy cows. Accordingly, we aimed to examine the effects of substituting fresh forage ramie for alfalfa (Medicago sativa) hay on production performance, milk composition, and serum parameters of dairy cows. Thirty-two Holstein cows (body weight (BW)=590 +/- 50.6kg) were randomly divided into four groups of eight cows. The experimental period lasted 10weeks. The dietary treatments consisted of four proportions of fresh forage ramie (0, 33, 67, and 100%) as a substitute for alfalfa hay (designated as CON, FR33, FR67, and FR100, respectively). On days 69 and 70 of the experimental period, milk and blood samples were collected for analysis. We found no significant differences in the milk yield and milk quality (milk protein percentage, milk fat percentage, and milk lactose percentage) between the treatments. We did find that forage ramie significantly reduced dry matter intake (DMI) and 4% fat-corrected milk (FCM) yield. Meanwhile, no significant differences were detected in serum parameters between the treatments, with the exception of triglyceride (TG) and alanine aminotransferase (ALT). In conclusion, our data indicate that alfalfa hay can be replaced with forage ramie in the diet of Holstein cows in the milk lactation stage, with no negative effects on milk quality and blood parameters.

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