In recent years, pig artificial insemination technology has been widely promoted and applied in the development of pig production. The development of pig artificial insemination technology can not only reduce the spread of pig disease, but also reduce the cost of feeding, increase the utilization rate of breeding boar and solve the individual differences in mating. , increase the breeding efficiency. Therefore, more and more attention has been paid by the pig farmers. France Dayou (China) Co., Ltd., an expert in artificial insemination equipment, has been engaged in the clinical promotion of pig artificial insemination technology for many years. It has accumulated some experience in practical work and is now introduced as a reference for peers. .
1, the choice of semen quality
Choose boars with stable genetic properties, no disease, good quality, and good health. Boars are within 1~4 years of age. Feed rich in nutrients before harvesting, increase exercise, and exercise at least 15-20 times a day. Rain, effectively improve the survival rate of spermatozoon sperm, collect sperm twice a week (regular sperm collection, can keep the boar a good habit), semen collected in a timely manner after the dilution test, stored at room temperature.
2, estrus identification
Assurance of sow estrus identification is crucial, and it is the key to ensure that sows can conceive. The optimal mating age and weight for the first-time sows are usually 8 months of age, weight between 6o and 7O kg, and the first few periods of time, although Sows have obvious estrus characteristics, but early mating will affect sow reproductive performance, shorten the useful life, it is best to choose the 4-6 season when the mating. Once the sow is found to be buzzing, her eyes are sluggish, the reaction is delayed, her appetite is decreased, there is a crawling behavior, her waist is pressed, standing motionless, and the vulva mucus hanging wire can be inseminated. As for the sows, they are generally insemination on the third day of estrus. When the genital swelling evaporates slightly (the vulva adheres to grass clippings), the insemination rate is 15 to 20 mL each time. For the sake of safety, the spermatozoa are generally lost twice. One time in the morning, one in the afternoon, or one in the afternoon on the same day, the next day in the morning.
3, preparation before insemination
3.1 Strengthen feeding and management. One week before mating, give the sow nutrient-rich feed, promote multiple ovulation, and lay eggs to create conditions for conception of sows.
3.2 Equipment: A rubber tube with a length of 40 cln and a diameter of 9 Inm (blunt at one end), a 20-50 mL disposable syringe, a pair of medical rubber gloves, and a qualified l0-20 mL boar semen , 2% potassium permanganate solution 500 mL.
4, insemination
Soak the vulva with soapy water first and then wash with a 1.5%-2.0% potassium permanganate solution. The inseminators wear sterile rubber gloves on their hands and the vas deferens to be sterilized at a high temperature and maintain a certain temperature (preferably close to the sow's body temperature). The inseminated person presses the sow's back with his left foot on the hindquarters of her sow, opens the sow's pussy with her left hand, and slowly inserts the vas deferens into the vagina. When the vas deferens is inserted for 2h5~30 cm, the syringe with semen is connected. On the vas deferens, intermittently push the syringe plunger and slowly inject the semen into the cervix of the sow, 1-2 min later. Then slowly pull the vas deferens upward toward the root of the sow, and repeatedly press the back of the sow a few times, and the insemination ends.
5, summary
The technique of artificial insemination of swine is suitable for promotion and application in the vicinity of towns and convenient transportation areas. It is particularly suitable for scattered sow raising households. The technical requirements are low and the operation is simple. Usually, as long as the observation, accurate grasp of the estrus estrus identification, timely insemination, Can receive good results.
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