1. Know what you are doing
The success or failure of artificial insemination is often determined by the operator's practical and theoretical knowledge. Sometimes, artificial insemination operators on modern farms cannot find the problems in the relatively simple work carried out in the breeding house, but they must go to the breeding house every day— 4) It takes a lot of time to check and instil.
2, the correct feeding program
To a large extent, high-efficiency artificial insemination depends on the sow’s ability to conceive. This requires a reasonable feeding program to ensure a high conception rate and litter size. Sows should maintain good body before entering the farrowing house. In addition, during the period of lactation, it is not possible to lose weight too much. Aphrodisiac supplementation is a common feeding method for weaned sows. In addition, special weaning sows are fed with special high-fiber roughage or the type of feed is changed, and the minerals in the formula are changed. And vitamins will bring sows' estrus early.
3, suddenly weaned
Simultaneous weaning of sows on piglets can result in a drastic decline in the energy demand of the sow for the diet, aphrodisiac feeding, environmental changes, feeding roughage, and the ability to exercise freely. In fact, any minor changes will stimulate the mother. Swine estrus.
4, the breeding area provides enough light
Light plays an important role in stimulating heat. Therefore, we must ensure adequate light in the breeding room (weaning sow area), can hang light bulbs in this area (to keep the light intensity around 100 lux), and extend the daily illumination time by 2-3 hours. Adequate lighting can also facilitate the investigation and insemination.
5. Exposure of Boars
It is beneficial to place the boar in the breeding area because it stimulates the estrus of the weaned sow. Two to three days after weaning, sows are allowed to contact their noses and noses twice a day. The boar's size, sound, and odor will stimulate their heat.
6, at least 2 estrus inspections per day
Prepare to spend a lot of time in the breeding room, because the accurate investigation will bring you a substantial income. In order to know the estrus curve of the sow, you must check the situation twice a day. Use a boar or badger boar when checking the situation. Let the male and female pigs keep nose-to-nose contact for 5-15 minutes, 2 times a day, press the sow's back by hand, and observe the sow’s response. These can allow the female pig to heat in advance. Make it easier to check your situation.
7, timely insemination
Timely insemination is the key to success. Insemination should be performed 10–24 hours before sows ovulate, and ovulation usually occurs at 2/3 of the entire period of the ovulation. Therefore, if a pig lasts for 2 days, the insemination should be performed 15-15 hours after the first sow reflex; if the duration lasts 3 days, it should be 30-40 hours after the first reflex. Insemination. However, the duration of estrus in production is not easy. Therefore, multiple inseminations are often required, but there are also certain rules. A short interval between disconnects often means that there is a long period of estrus, and the interval between disconnections leads to a decrease. Short estrus period.
Young sows need special treatment. Insemination should be performed immediately or rapidly after it appears to stand, but older sows should lag behind.
The important indicator of timely insemination is the color of the vulva. When the deep red inside the vulva just disappeared and did not appear again, and the sow could stay for 2 minutes before the boar, this is the best time to inseminate, stimulate her by pressing the back of the sow, can promote the uterus contraction, And increase the chance of pregnancy, insemination in this state, most sows can be only once, to control the proportion of secondary insemination below 30-40%.
8. Boar stimulation during insemination
When you are inseminated, make sure that you have a boar in front of your sow, and massage your back and abdomen regularly. You can use your hands or a heavy sandbag. It has been shown that using this procedure can increase the number of piglets per litter by 0.5. .
9, after insemination
As mentioned before, ovulation occurs in 2/3 of the estrus time. In order to find out the length of estrus, you must continue to check the situation. If the duration of your estrus is too long or exceeds your expectations, you will have to perform a second insemination, but this must be done 16-24 hours after the initial insemination.
10, the correct method of insemination
Avoid direct sunlight, cleanse the vulva before insemination, use sterile or disposable equipment, apply lubricant to the front of the vas deferens, rotate anticlockwise into the vagina, until the front end is locked, so that the contraction of sow uterus determines the speed of semen, do not use Hand squeezing the insemination bag and observing the sow's absorption of semen and recording.
11. Use reliable semen
12, let the sow rest
It is best to keep the sows separately after insemination, and to prevent any stress after 4 weeks. Let her rest and not feed too much feed. Pay attention to the situation after 19 days.
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