Improvement And Production Application Of Sika Deer Timing Insemination Technique

There are more than 6000 sika deer in Ningxia,mainly distributed in Liupanshan area,Zhongwei City and northern Yinchuan.The sika deer is a seasonal animal in estrus.The artificial insemination of sika deer in China must start in early September and end in early October.Time is tight and the workload is heavy.The sika deer are timid and wild,and it is too difficult to carry out the trial work,which leads to the low rate of estrus exposure and low conception of the sika deer.In the large-scale artificial deer farm,the number of ovulation and the control of ovulation time are artificially regulated in the reproduction work.especially important.Sika deer artificial insemination methods include opener insemination method,laparoscopic uterine horn insemination method,and simultaneous estrus artificial insemination technology.The insemination method(using Cassou insemination gun)does not guarantee that the insemination gun will pass through the cervix completely.Using a simple insemination gun,the cervix pass rate is high,but hygiene and aseptic operation are difficult to guarantee,and the vagina after embedding the suppository has a certain infection rate,and the insemination gun passing through the vagina has the risk of contaminating the uterus.The laparoscopic uterine horn insemination method abandons the conventional insemination channel,and directly injects the semen into the uterine horn through a minimally invasive and sterile surgical pathway,avoiding the restriction of many unfavorable factors,reducing the risk of infection,saving the amount of semen,and It is possible to obtain a higher conception rate,and it is worth promoting in the breeding of sika deer.It is common for sheep and sika deer to embed progesterone suppositories in the vagina to cause vaginal infection and loss of suppositories,which seriously affects the effect of insemination and the pregnancy rate during estrus.The experiment carried out the improvement of timed insemination technology for many sika deer,and compared the conception rate and practicability of different insemination methods,and reached the following conclusions:1.Sika deer ovulation at the same time and timing insemination can achieve a higher estrus conception rate.This ovulation timing insemination procedure is suitable for promotion and application,and should continue to be summarized and improved in future production practices;2.The simple insemination method of sika deer vaginal opener is more suitable for sika deer insemination than laparoscopic insemination.The opening of the cervix of the sika deer is narrow,and the Cassou insemination gun is not easy to pass,and the simple insemination gun is easy to pass through the cervix due to the small tip of the gun.After a simple insemination gun operation,it is proved that the structure of the sika deer cervix is not complicated,and the gun tip can pass through the entire cervix smoothly after entering the cervix;3.The operation of laparoscopic insemination is complicated,requires a specific surgical environment and more expensive surgical equipment,requires the surgeon to be highly skilled,requires a large number of personnel,and is not suitable for promotion in sika deer production,but has great potential for commercial application Once the technology is mature,it is very suitable for large-scale production applications.The results of this experiment are far from the expected results,and the application of this technology in production remains to be studied.4.Strict implementation of the aseptic technique and the use of antibiotics when embedding the plug can significantly reduce the infection rate;5.The self-made vaginal suppository inserter can embed the suppository body in the deep part of the vagina to prevent losing the suppository.At the same time,the CIDR suppository tail has a complete structure,which saves time and effort in removing the suppository,effectively controls infection,and significantly improves work efficiency.