We all know that pig farms want to increase their income, they have to make up the bar, and another way is to pass the sow to give birth. The average sow will enter the estrus period within 7-12 days after the milk. If there is no sign of estrus after 30 days after weaning, it will affect the breeding of the farm. Today, Xiaobian talks about the reasons why the sow is not estrus and the treatment. First, the reason why the sow does not estrus 1, the initial age is too early The number of newborn piglets is small, the weight is light, the sow's milk is insufficient, and the survival rate is low. What is more serious is that the breeding affects the growth of the sows and the body weight is different from that of the same age sows. Therefore, usually after weaning, there will be symptoms of delayed estrus or even estrus, which will increase its elimination rate. 2. The impact of seasonal changes As a periodical estrus livestock, sows can carry out estrus breeding all year round, but in the summer, sows have less activity, usually enter the estrus for a longer period of time after weaning, and the estrus rate is significantly lower than other seasons, especially for For priming sows, estrus delays or even estrus are more common. 3. Improper feeding and management Sow estrus is closely related to the living environment. If several sows in a pig house have delayed estrus or estrus at the same time, they should consider whether it is a problem of feeding management. The pig house has poor sanitary conditions and improper feed mix. Undernutrition or overnutrition can affect the estrus of sows; sows after weaning need special care, and there will be excessive weight loss during lactation after weaning. If this is not carried out scientifically, it will increase weight loss. Serious weight loss, body weight loss will inevitably affect estrus. 4, the cause of the disease Most of the gilts have achieved natural estrus. Only when there are individual problems, the cause of the disease should be considered, such as genital dysplasia, endocrine disorders, pregnancy, and problems in the process of production, delaying estrus or estrus. The problem. Second, the treatment of sows without estrus 1. Scientifically master the mating period of sows Reasonable control of the initial matching period plays an important role in maintaining the weight of the sow and improving the breeding rate. The mating period of most breeds of sows is about 8 months, and the body weight should not be less than 100kg, but the initial matching period does not mean that it can be smoothly propagated. Some farmers usually let 3 estrus periods, each estrus period is 18-21 days, in the fourth estrus period, breeding gestation for pregnant gilts can effectively improve the quality of breeding and ensure natural estrus after weaning. 2, using scientific feeding methods In the lactation period, the weight of the sow will suddenly drop. At this time, the sow body condition reserve should be adjusted by adjusting the feed nutrients to maintain the "low pregnancy, high lactation" situation. According to the sow's lactation period, the feeding amount is reasonably controlled, and while maintaining the healthy growth of the piglets, the weight of the sow is ensured and the estrus is prepared. After weaning, control the feeding of high-protein feeds to avoid the problem of over-fertilization of sows. 3, do summer heatstroke cooling In the summer, we should always pay attention to the temperature and humidity of the pig house, do a scientific heatstroke prevention, and avoid the high temperature and humid environment to disrupt the sow endocrine system. When the temperature of the pig house rises to 33 °C, the breeder should do a drip cooling, and at the same time, control the humidity should also be well ventilated to maintain the sow's daily feed intake and control the weight loss during lactation. 4, the use of hormone therapy In response to delays in estrus or estrus, breeders can use hormones to stimulate sows to estrus. For sows that do not enter natural estrus after weaning, 4 mL of "triad hormone" containing citrate, propofol, and estradiol benzoate can be injected intramuscularly. If it still does not enter estrus, continue injection after 5 days. . For sows with good hormonal injection, ovulation can be administered intramuscularly 8-12 hours before breeding to increase the number of ovulation and litter size. The above are the reasons why the sows do not estrus and the treatment measures. Many farmers think that the sows do not estrus, it does not matter, but in fact, the sows do not estrus will have a great impact on the breeding of the farm, and even the farmers Caused a certain economic loss. Therefore, farmers must pay attention to it, and hope that the above content can help farmers. For the wonderful pictures and hot comments about the sow's estrus, you may be interested in the following recommended content. Welcome to read. Salinomycin Anticoccidial,Salinomycin Veterinary Use,Salinomycin Feed Additives,Salinomycin Animal Medicine Shandong Shengli Bioengineering Co., Ltd , https://www.shenglipharm.com
