Artificial insemination technology of pigs

Artificial insemination of pigs is an advanced pig-raising technology in modern pig-raising industry at home and abroad. Its operation process includes six aspects: semen collection, semen quality inspection, dilution, preservation, transportation and insemination. Artificial insemination of pigs is based on the bionic principle that the temperature, pressure and viscosity of a special artificial vagina are similar to those of sows. After the qualified boar semen is collected by the sperm collection platform, it is transported and stored at normal temperature or low temperature, and then it is imported into the uterus of sows with a rubber vas deferens similar to the penis structure of boars, so that sows can conceive and give birth.

At present, there are four new technologies related to pig artificial insemination. One is a long-acting semen diluent; Second, intrauterine insemination; The third is the sex division of boar semen; Fourth, hormones control estrus and pregnancy.

1, long-acting semen diluent

At present, the time limit for preserving the semen diluent of fresh pig sperm to ensure its viability at 0.7 is generally 5 days, which is a long record. After 5 days, sperm motility decline can not guarantee the quality of insemination, so many researchers are currently working on the study of long-acting semen diluent. Basically, it can increase the effective working time of artificial insemination station, reduce or avoid weekend semen collection, reduce the transportation cost of semen, detect whether semen is contaminated by porcine reproductive and respiratory syndrome virus before transportation and application, prolong the storage time of semen and reduce the waste of semen in pig farms.

2. Intrauterine artificial insemination

This technique includes intrauterine insemination and cornual insemination. Uterine insemination is more common, but corner insemination has not reached the popularization level in pig production. The advantage of intrauterine insemination is to reduce semen reflux; Reduce the number of sperm per insemination; Reduce the amount of semen per insemination; Reduce the time of each insemination and the number of boars; Reduce the cost of raising pigs.

3. Sex division of boar semen

At present, gender division in production is not very successful, one is that the detection time is long, and the other is that sperm motility is reduced.

4. Sensitized uterus

At present, in pig production, hormones are used to sensitize uterus and improve pregnancy rate, such as adding oxytocin and prostaglandin to each semen; Some experiments, such as adding synthetic seminal plasma products before fertilization, make infertile boars mate with sows; The purpose of inseminating sows with dead sperm is to test the effect of hormones on uterus.