The number of litters per year of the sow is related to the number of litters in the entire pig farm, and it is the basic economic income of the pig farm. Raising the number of litters per year of the sow can greatly increase the income of the pigs, but how can the mother raise the number of herds? What is the number of litters born in pigs? With this question, we read the following.
1, early weaning
Early weaning is to shorten the production cycle and increase the number of litters per litter by shortening the lactation period. From the physiological point of view of piglets, weaning pigs are suitable for weaning at 3 to 5 weeks of age. Because, at this time piglets have used about 60% of the sow's milk production, the body is relatively strong, in addition, the piglets have been able to get their own nutrients from the feed. However, early weaning of piglets must take appropriate measures, such as creating suitable environmental conditions, good breeding facilities, such as the use of incubators, infrared lamps, etc.; preparation of full-price piglets and artificial milk, so that early eating, Timely feeding and so on.
2, increase the estrus period conception rate
If the sow has not been registered after estrus, she must wait 21 days for another estrus to be able to breed. This not only increases the cost of feeding, but also lengthens the production cycle of the plant, which is bound to reduce the number of litters per year. The higher the conception rate during estrus is, the more favorable it is to increase the number of litters per year. In production, measures such as improving boar semen quality, timely mating of sows and application of hormones are used to increase sow fertility during estrus.
3, lactation breeding
Research and practice have shown that sows have 3 estruss postpartum, the first being 3 to 5 days after childbirth, but because of endocrine and lactating causes, the sows have no obvious estrus, and the eggs are not mature enough to be used. The second time is 27-32 days after childbirth. It is an estrus period that can be normal estrus and ovulation. Sows can be used for breeding. The third time is 3 to 7 days after weaning. Although lactation breeding can shorten the production cycle and increase the number of litters per year of the sow, but the sow is not weaned at this time, and has the dual task of lactation breeding and pregnancy. Therefore, it is necessary to ensure the full price of the lactating sow. In addition, technical requirements for estrus identification and breeding are relatively high in the mating period during lactation.
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