| The experiment was conducted to investigate the effects of Chinese herbal medicine prescriptions on dry matter intake, body weight, milk yield, milk composition of perinatal dairy cows, and to provide a theoretical basis and method for the better use of the production performance of dairy cows and the application of Chinese herbal medicine additives in dairy cattle production.24 Chinese Holstein dairy cows in transition period with similar calving date, parity, average milk production were randomly divided into 4 experimental groups, the control group, treatment group A, treatment group B and treatment group C, with 6 replicates per group and 1 cow in each replicate. The cows in control group were fed basal diet, and others in experimental groups were fed the basal diet supplemented with 100g/d, 200g/d, or 300g/d Chinese herbal medicine per cow respectively. The experiment lasted for 42 days, from prenatal 21 days to postpartum 21 days. During the experiment, the cow's body weight and feed intake were measured and recorded, blood samples were collected to analyze reproductive hormone level and the milk samples were used to analyze the milk component, mastitis incidence of dairy cow, calf birth weight,the rate of dystocia and mazischesis proportion were also recorded. The results showed as follows:1. Compared with the control group, the DMI of cows in experimental groups was significantly improved. The DMI was raised by 1.74kg/d?1.56kg/d?1.72kg/d respectively from the prenatal 14th day to prenatal 7th day(P<0.05); the DMI was raised by 1.07kg/d?2.31kg/d?0.88kg/d respectively from the prenatal 7th day to parturition;the DMI was raised by 1.00kg/d?1.08kg/d?1.39kg/d respectively from parturition to postpartum 7th day;2.Compared with the control group, the average body weight of cows improved significantly.The average body weight of cows in experimental groups was raised by 3.50kg?2.58kg?4.24kg respectively in postpartum 7th day(P<0.05),the average body weight of cows in experimental groups was raised by 2.59kg?3.40kg?3.61kg respectively in postpartum 14th day(P<0.05),the average body weight of cows in experimental groups was raised by 1.11kg?1.17kg?3.54kg respectively in postpartum 21th day(P<0.05),the average body weight of group C was higher than that of group A and group B by 2.43kg,2.37kg respectively (P<0.05)?3.Compared with the control group,the daily average milk yield improved significantly.The milk yield was raised by 4.08kg/d?5.37kg/d?5.54kg/d respectively (P<0.05);the dry matter in the milk of cows in experimental groups was raised by 0.46%?0.48%?0.53%respectively (P<0.05), the milk sugar rate of milk in experimental groups was raised by 0.02%?0.08%?0.12% respectively (P<0.05), the milk protein rate of group B?group C was raised by 0.08%?0.07% respectively (P<0.05), the somatic cell count in milk of cows in experimental groups was reduced, and the incidence of mastitis was reduced.4.Chinese herbal medicine additive had certain effects on the secretion of E2, FSH and LH.It can relieve the reproductive stress due to dramatic changes in reproductive hormones, improve the level of FSH to promote the development of postpartum follicle, and improve the level of LH which contributes to the recovery of postpartum reproductive function, and improved the birth weight of cows and decreased the rate of dystocia and Mzischesis proportion.According to the above results, it can be concluded that the compound Chinese herbal medicine can improve the production performance of perinatal dairy cows. |
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