Replacing alfalfa hay with paper mulberry (Broussonetia papyrifera L.) silage in diets do not affect the production performance of the low lactating dairy cows

文献类型： 外文期刊

第一作者： Wu, Zhaohai

作者： Wu, Zhaohai;Liang, Chunyu;Huang, Rongcai;Ouyang, Jialiang;Zhao, Liansheng;Bu, Dengpan;Bu, Dengpan;Bu, Dengpan;Bu, Dengpan

作者机构：

关键词： Paper mulberry silage; Low lactating cow; Production performance; Antioxidant capacity

期刊名称：ANIMAL FEED SCIENCE AND TECHNOLOGY （ 影响因子：3.313； 五年影响因子：3.914 ）

ISSN： 0377-8401

年卷期： 2022 年 294 卷

页码：

收录情况： SCI

摘要： Developing and utilizing more roughage resources is conducive in improving the health status of dairy cows and beneficial in controlling the production costs of raw milk. In the current study, we investigated the impact of replacing alfalfa hay with paper mulberry silage (PMS) on the pro-duction performance of low lactating dairy cows. Sixty multiparous Holstein cows were stratified by milk yield, days in milk and parity and randomly assigned to 4 treatments: control diet without PMS (CON) or 33.33 %, 66.67 % and 100 % alfalfa hay replaced by an equal amount of PMS (DM basis, PMS1, PMS2, and PMS3, respectively). The experiment lasted for 14 weeks, with the first 2 weeks for adaptation. Dry matter intake of low lactating dairy cows was not affected by PMS, and though milk yield of PMS3 was 1 kg lower than CON, no statistical differences were observed. Lactose yield and feed conversion efficiency (FCE) tended to be affected by treatment x week interaction (P = 0.07 and P = 0.08, respectively), and the FCE of PMS groups was lower than CON in wk12 (P = 0.08). No treatment effect on oxidative stress-related variables was detected, except malondialdehyde (MDA), which tended to be decreased by PMS (P = 0.06). Cows in PMS3 had lower CP digestibility than CON (P = 0.004), and the apparent digestibility of NDF and ADF were lower for PMS2 compared to CON (P = 0.004 and P = 0.05, respectively) and PMS1 (P = 0.005 and P = 0.006, respectively). In conclusion, replacing alfalfa hay with paper mulberry in the diet of low lactating dairy cows did not affect DMI and milk yield, but improved their antioxidative capacity. However, the amount of paper mulberry should be added to the diet cautiously, due to its potentially adverse effect on digestibility and milk yield in dairy cows.

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