The fertility of fertile sows is an important indicator of aquaculture production, and the identification of estrus in sows is the key to improving sow fertility. The phenomenon of false estrus in sows will occur during sow feeding and management. The sow in the pig's wig was pregnant after mating, and the estrus appeared again in the next situation. The fake gilts are more likely to occur in rural collective pig farms or specialized household pig farms, and are less likely to occur in state-run farms or in feed-quality farms.
1, the difference between fake and true estrus
(1) The false estrus is not as obvious as the true estrus. The duration of estrus is short and one or two days passed.
(2) The sow is picked up into the circle. It can be seen that the sow's tail droops naturally or with the tail in it, instead of swinging.
(3) The sham sow does not allow the boar to climb.
2, the cause of the fake hair
(1) When the nutritional status of sows in the early stages of pregnancy is very deteriorating, such as a serious lack of protein, vitamins B1, B and other nutrients, the destructive effect of the liver on the estrogen in the blood circulation weakens, resulting in a short content of estrogen Increase in time, under the effect of estrogen false estrus phenomenon.
(2) The climate is changeable, and the diseases of life and death organs are also factors that cause the occurrence of false heat in endocrine disorders of sows.
3, control measures
Enhance the sow's late pregnancy nutrition, so that the sow can reach 90% or more; strengthen the sow early lactation nutrition, sows in the piglets after weaning to maintain a moderate degree of phlegm, short-term excellent feeding, improve sows before and after mating and early pregnancy Nutritional status, this is the fundamental measure to prevent false hairs. In addition, prevention and treatment of sow reproductive tract diseases, good cold insulation work in early spring, fed more green and juicy feed is also a measure to prevent false hairs.
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