Control of Key Points of Postpartum Care in High-yielding Dairy Cows and Its Effect on Pregnancy Rate
The purpose of this experiment was to study the physiological changes of postpartum uterine rejuvenation of dairy cows,and to develop a set of postpartum nursing technical procedures,which can promote postpartum uterine rejuvenation of dairy cows,shorten postpartum rejuvenation time and calving interval,and improve the conception rate of high-yield dairy cows.This study was divided into 4 groups,which were postpartum monitoring group and natural recovery group,non-anti-treatment group and PGF2α treatment group,reproductive disorder monitoring group and control group,pregnancy detection rectal control group and B ultrasound group.The results showed as follows:(1)The elimination rate of PGF2α postpartum monitoring group was significantly lower than that of natural recovery group,and the pregnancy rate was significantly higher than that of natural recovery group,and the difference was significant(P<0.05);(2)Due to the existence of antibiotic residues in dairy products,the experimental study was conducted in the no-antibiotic group and the hormone-treated group.Both of the two treatment methods for postpartum cows achieved satisfactory re-sults,but the difference between the two groups was not significant(P>0.05);(3)The fertilization rate of the monitoring group was 90.8％,which was significantly higher than that of the control group(P<0.05).(4)The restored cows were inbred respectively.At 30 and 45 days after inbreeding,B-ultrasound method and rectal grasp method were used for pregnancy detection.At 30 days,there was a significant difference between the two pregnancy detection methods(P<0.05);at 45 days,there was no difference between the two pregnancy detection methods,and both could achieve 100％accuracy of pregnancy detection.To sum up,under the conditions of this experiment,it is very necessary to carry out nursing at the critical time node of postpartum dairy cows,which can achieve early.
NETL
NSTL
万方数据
维普
