Hao Yangyi, Huang Shuai, Si Jingfang, Zhang Jun, Gaowa Naren, Sun Xiaoge, Lv Jiaying, Liu Gaokun, He Yaqin, Wang Wei, Wang Yajing, Li Shengli
State Key Laboratory of Animal Nutrition, Beijing Engineering Technology Research Center of Raw Milk Quality and Safety Control, College of Animal Science and Technology, China Agriculture University, Beijing 100193, China.
Animals (Basel). 2020 Jul 7;10(7):1152. doi: 10.3390/ani10071152.
Paper mulberry (; PM) is an excellent and extensive type of roughage in Asia. This study aimed to evaluate the effects of PM silage on the milk production, apparent digestibility, antioxidant capacity, and fecal bacteria composition in Holstein dairy cows. Forty-five lactating Holstein dairy cows with a similar milk yield and parity were selected and randomly assigned to three groups. The control group was fed a non-PM silage diet, and the PM-treated groups were fed 4.5 and 9.0% PM silage supplementary diets for 28 days. Then, treatment groups were fed diets containing 13.5 and 18.0% PM silage for the next 28 days, respectively. PM silage increased the milk urea nitrogen and decreased the somatic cell count ( < 0.05), but did not affect the dry matter intake, milk yield, apparent digestibility, and energy balance of dairy cows. PM silage can enhance the blood total antioxidant capacity, superoxide dismutase, and immune globulin content ( < 0.05). The PM silage significantly decreased the relative abundance of the genera and ( < 0.05). In conclusion, PM silage enhanced the antioxidant capacity and immunity of dairy cows, but did not influence the milk yield, dry matter digestibility, and fecal bacteria composition.
构树（PM）是亚洲一种优质且广泛存在的粗饲料。本研究旨在评估构树青贮饲料对荷斯坦奶牛产奶量、表观消化率、抗氧化能力和粪便细菌组成的影响。选取45头产奶量和胎次相近的泌乳期荷斯坦奶牛，随机分为三组。对照组饲喂不含构树青贮饲料的日粮，构树处理组分别饲喂4.5%和9.0%构树青贮补充日粮，持续28天。然后，处理组在接下来的28天分别饲喂含13.5%和18.0%构树青贮的日粮。构树青贮提高了牛奶尿素氮含量，降低了体细胞数（P<0.05），但对奶牛的干物质摄入量、产奶量、表观消化率和能量平衡没有影响。构树青贮可以提高血液总抗氧化能力、超氧化物歧化酶和免疫球蛋白含量（P<0.05）。构树青贮显著降低了[具体属名1]属和[具体属名2]属的相对丰度（P<0.05）。总之，构树青贮提高了奶牛的抗氧化能力和免疫力，但对产奶量、干物质消化率和粪便细菌组成没有影响。
