Strengthening sow rearing management to improve sow reproduction rate

1. Select breeding sows to adopt integrated breeding methods based on reproductive traits. First, the litter size should be selected as the breeding standard, and the gilts should be selected among the excellent individuals with high reproductive performance of the parents. Secondly, the number of the weaned piglets and the weaned weight of the weaned piglets should also be taken into consideration when selecting the reserved gilts.

2. Delay the initial age of sows. Practice has shown that pigs with older ages have long reproductive lives, sows have more litters and more weaned pigs, and sows with younger sows have the shortest reproductive life. There are fewer babies and less weaning. Therefore, delaying the initial mating age of sows can increase the number of sows born and extend the reproductive life of sows.

3. Increase the number of breeding and increase litter size. It has been proved that the number of litters per litter of gilts per estrus is 2 times higher than the number of litters per litter, and the number of litters per litter within the 24 hours of sow estrus is 3 times higher than 2 litters.

4. Using heterosis, screening for high-yield hybrid combinations, the reproductive performance of the hybrid generation such as litter size, weaning survival, and weaning weight significantly exceeded the parental performance.

5. Early weaning of suckling piglets, increasing the number of breeding stocks per year is an important issue in raising sows' breeding performance. Seeding sows are generally 114 days in gestation. In addition to the period of lactation and return to breeding, the average sow has only 1.8 litter per year. Adopting scientific technology will enable the sow to produce 2.5 litters a year, 5 litters in 2 years, and 1.4 litters in 2 sows. This will increase reproductive performance of a sow almost without increasing costs. An important technique for increasing the number of litters per year is the early weaning of piglets, and foreign weaners have 7-10 days. According to pig e-users, we know that our country has more than 21-35 days of weaning at present, and it has been proved that piglets can make up early grains and start eating early, weaning at 25-35 days of age, and there will be no infertility to the subsequent development of bamboo. Generally 2 weeks after birth, feeding can be performed, and at the same time, early weaning sows have better nymphobia, which facilitates timely estrus and breeding, shortens the production cycle, and reduces production costs, which can greatly increase the economic benefits of raising sows.

6. Grasp the ovulation regulation of sows and timely breeding. The ovulation of sows is 24-36 hours after estrus, and the suitable time for breeding is 2-3 hours before ovulation of sows, that is, 19-30 hours after estrus. According to the sow's age, “older and younger” can be adopted. The principle of "not middle and middle with middle".

Of course, scientific feeding and management have an important influence on the conception rate, farrowing rate, and breast-feeding rate of sows. Therefore, the sow's feeding management must be strengthened to maintain a good breeding condition.

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