It is difficult to natural breeding after artificial breeding habits of pigs

On December 15th, Shi Guanghua of Yongfeng Town, Tinghu District, Yancheng City, reported to the newspaper “The Pastoral Doctor 110” that he introduced a boar about 500 kilograms from the Taicang breeding farm three months ago. Artificial sperm collection, semen quality is also relatively good, after the purchase of natural breeding boar found "not", mainly as the penis has not reached the sow vagina before ejaculation. He asked: What is the breeding pig? What should I do if the sow does not fit?

The reporter interviewed Ren Shouwen, a researcher of the Animal Husbandry Institute of the Jiangsu Academy of Agricultural Sciences. Ren Shouwen said that because the breeding pigs were artificially collected earlier, they may have developed a habit of artificial collection, that is, as long as artificial vaginal harvesting is achieved. Temperature and pressure breeders can produce a phenomenon of ejaculation behavior. In modern breeding farms, artificial insemination is generally used. Therefore, more breeding pigs are trained in breeding. When farmers purchase breeding pigs, they should first think about whether to introduce natural breeding or artificial insemination after the introduction of breeding pigs, and then select breeding pigs according to their own needs.

Is there any way to improve it? Ren Shouwen said that only through multi-training, multi-climbing and multi-natural breeding can breeding pigs develop new ejaculation habits. In addition, it can also be improved by increasing feed nutrition and proper exercise. Of course, sows can also be bred by artificial insemination.

The equipment required for artificial insemination of pigs mainly includes inner tubes, false vaginas, sperm collection bottles, vas deferens, and syringes. Artificial insemination of pigs includes artificial sperm extraction and artificial insemination. The freehand method is a simple method of extracting sperm that is stimulated by stimulation of the cervix of the sow on the glans penis of the boar. When a fine boar is in hand, when the boar's penis sticks out, it is introduced into an empty fist, and it is pumped for a moment. The fingers are light to tight and hold the penis glans to keep it from turning. When the penis is fully erected, Forward, the fingers elastically and rhythmically adjust the pressure. When the boar ejaculates, it is collected in a collection cup. In the artificial insemination, the semen is diluted with glucose and sodium citrate in time according to the amount of sows to be bred and the amount of sperm collected. The best time for sows to artificially inseminate is usually when they exhibit a standing reaction. To ensure the conception rate and litter size of the sow, the insemination can be repeated between 8 and 12 hours after the first insemination. 1 time.