The Influence of Different Estrus Treatment Schemes on the Synchronous Estrus Effect of Cervus nippon
In order to explore the optimal estrus synchronization plan for Cervus nippon,163 healthy,normal estrus cycle,and well reproducing female deer were selected from Shuangyang Deer Industry Breeding Co.,Ltd.in Jilin Province and randomly divided into three groups:Group A was treated with domestic vaginal progesterone suppositories(CIDR),Group B was treated with imported CIDR,and Group C was treated with secondary PG supplemented with pregnant horse serum gonadotropin(PMSG).Another 100 female deer were randomly divided into four groups,and the selected optimal plan was combined with different doses of PMSG treatment(100 IU in Group Ⅰ,300 IU in Group Ⅱ,500 IU in Group Ⅲ,and 700 IU in Group Ⅳ),to explore the effects of different estrus treatment plans on the estrus effect,estrus time distribution,concep-tion rate,and twin lambing rate of C.nippon,as well as the effects of different PMSG doses on the estrus conception of fe-male deer.The results showed that there was no significant difference in the synchronous estrus rate between Group A and Group B,but the synchronous estrus rate in Group A and Group B was 23.5%and 33.3%higher than those in Group C,re-spectively(p<0.01),and the thrombus shedding rate in Group A was 8.8%higher than that in Group B(p<0.05).The three treatment schemes had a significant impact on the distribution of estrus time(p<0.01).Compared with Groups A and C,the fertility rate and farrowing rate in Group B wer higher than those in Groups A and C,respectively 6.5%and 9.8%(p>0.05),the twin rate is higher than 13.4%and 17.6%(p>0.05).Adopting imported CIDR combined with different doses of PMSG for synchronous estrus treatment of C.nippon revealed that the estrus rate in the Groups Ⅱ,Ⅲ,and Ⅳ was 36.0%,40.0%,and 48.0%higher than that in Group Ⅰ(p<0.05),showing an increasing trend with the increase of PMSG dose.There was no significant difference between the other Groups(p>0.05),but the estrus time was concen-trated between 24-48 hours.The conception rates of Groups Ⅰ,Ⅱ,Ⅲ and Ⅳ were 46.2%,61.9%,59.1%,and 50.0%,respectively,showing a trend of first increasing and then decreasing(p>0.05).In summary,the estrus plan of vaginal em-bedding is significantly better than the secondary PG method,and imported CIDR is better than domestic CIDR.The estrus rate and conception rate of imported CIDR+PMSG female deer increase significantly with the increase of PMSG dose,but the estrus time is not affected by PMSG dose.The appropriate dose of PMSG is 300 IU.
NETL
NSTL
万方数据
