Application of Pig artificial insemination Technology in Rural areas

Farmers raising sows in bulk can not only make full use of the remaining meals, but also increase the economic income of the family. In particular, with the construction of rural biogas digesters in recent years, in order to produce sufficient biogas, each household has grown from one or two to eight or nine now. In this way, timely breeding of estrus sows becomes a problem. In the past, rural areas used to use Ben to bring in other people's boars or take sows out. It is very inconvenient to transport pigs around, and it is not conducive to disease control. For the sake of others, while others raise sows, I specialize in breeding boars and build a small boar station to provide semen to nearby sow farmers to carry out artificial insemination.

1. Improvement of dominant ① varieties in artificial insemination. Pigs with a certain outstanding character can be propagated rapidly by artificial insemination. For example, the growth rate is fast. Pigs with high lean meat percentage or pigs with good motherhood and strong fecundity. ② can fully utilize the breeding value of boars. ③ disease has the advantage of epidemic prevention, artificial insemination avoids direct contact between boars and sows, so it can prevent the spread of various diseases, especially reproductive tract diseases. ④ increases the conception rate, artificial insemination uses qualified semen, for infertile pigs, semen quality problems can be eliminated, and directly from the sows to find the cause, it is helpful to eliminate infertility and improve the conception rate.

two。 Miniature boar station equipment ① boar: depending on the number of surrounding radiation sows, it is generally equipped with boars at the ratio of 1 ∶ 80 ∶ 100. A parent breeder pig weighs about 40kg, the growth period is about 100days, and the price is 1400 ~ 1500 yuan. ② semen collection room: 1 fake pig station. ③ laboratory equipment: 1 optical microscope, 1 electronic scale, 2 sperm collection cups, 2 1000 ml plastic measuring cups, 2 1000 ml beakers, 1 pack of gauze, 1 package of disposable plastic bags, 1 package of rubber bands, slides, cover slides, the total price of the above equipment is 800 ~ 1000 yuan.

3. ① semen extraction: the breeder drives the boar to the semen collection column, washes the boar's lower abdomen with distilled water, cuts off the hair around the penis and dries it with a towel. The boar climbs onto the fake pig platform, gradually stretches out the penis, and the semen collector grabs the glans and pulls the penis out, clenching the glans to prevent its rotation, and the boars can ejaculate. Boar penis erection twice ejaculation, only collect milky semen, that is, the semen in the middle of the ejaculation process. The semen collection cup is filled with disposable semen collection plastic bag and the semen is filtered with double-layer gauze. The frequency of semen collection is usually once a week from 8 months to 12 months old, 2 to 3 times a week from 12 months to 18 months old, and twice a week after 18 months old. All boars should be collected once a week even if they do not need semen to maintain their libido and semen quality.

② semen quality testing: weighing with an electronic scale, generally calculated according to 1 ml 1 g. To determine the dilution multiple. Normal semen is milky white or light gray, the higher the sperm density, the lower the transparency. If yellow or yellowish green indicates urine or prepuce effusion, if pink or reddish brown indicates blood in semen, such semen should be discarded. It is normal for semen to have a fishy smell. If there is any other smell such as urine smell should be discarded.

Dilution of ③ semen: semen should be diluted and bottled within 5 minutes after semen collection. Dilution requires isothermal blending of diluent and semen, slowly inject the diluent into semen along the glass rod, stir while injecting, stop injection when the diluent is equal to the original semen, rest for a moment and then dilute until the appropriate density.

Preservation of ④ semen: if the semen can not be used in time, it should be cooled away from light at room temperature (22 ℃ tons, 5 ℃) and put in a 17 ℃ refrigerator 1 hour later. In rural areas, home wells are generally 15 meters from the ground (15 meters underground) with ropes hanging in the wells for preservation. The semen stored in the refrigerator rotates every 8 to 12 hours to prevent sperm from precipitating and dying. Microscopic examination must be made when using it. Vitality is more than 60% available.

⑤ insemination: first mating sows and estrus sows after 7 days of weaning were immediately inseminated with standing reaction, and those who were weaned for 3 ~ 6 days were inseminated at 6 ~ 12 hours after standing reaction. Insert the 45-degree angle of the vas deferens upward into the reproductive tract of the sow during deference. when you feel resistance, continue to insert the vas deferens slowly and vigorously until you feel that the front of the vas deferens is locked. Shake the semen, cut off the flat mouth, insert it into the vas deferens, make it flow smoothly, and carry on the insemination.

In the process of insemination, try to avoid squeezing the bottle, the difficulty of insemination can be through the method of pressing the back to stimulate the sow, if the semen is still difficult to input, the vas deferens may be inserted too far ahead of the uterus, so you need to pull the vas deferens a little. The time of insemination is at least 3 ~ 5 minutes. in order to prevent air from entering the reproductive tract after insemination, the back end of the vas deferens can be folded into a vas deferens bottle to make it fall off naturally. Each pig infuses semen at least twice in one estrus, and the interval between the two insemination is 8 hours to 12 hours, which is meaningless than 8 hours.

4. The benefits of artificial insemination in general, after each semen collection is diluted with diluent, 13 ~ 15 sows can be artificially inseminated. The price of artificial insemination is between 16 yuan and 18 yuan, and the cost is 1.5 yuan ~ 2 yuan (including the feeding cost of breeding pigs and the cost of diluent). This can be bought and sold at a profit in areas with a large number of pigs, especially in areas with a large number of piglets.