Causes and solutions of sow non-estrus in summer

High temperature in summer is a great hidden danger for pig farms, when sows often have no estrus because of high temperature and humid environment, which seriously affects the productivity of pig farms and reduces the economic benefits of farmers. So what is the reason why sows don't go into estrus in summer? Let's get to know it.

1. Seasonal influence

Sows are multi-cycle estrus livestock and can be mated all the year round, but during the hot summer season, the estrus rate of piglets after weaning is lower than that of other seasons, especially in parturient sows. In addition, lean sows and binary hybrid sows are more sensitive to high temperature, higher than 30 degrees will affect their estrus, at the same time reduce feed intake and ovulation, higher than 32 degrees, will stop estrus.

Solution: high temperature should first control the temperature, should not be too high, for non-estrus sows can use induction method, through boar courtship sound, mating behavior constantly stimulate the sow's pituitary gland, so as to induce sows to estrus.

2. Lack of nutrition

Hot and hot summer, sows lack of appetite, intake of nutrients, then sows will often appear in estrus, and less frivolous ovulation. In addition, the water loss of sows is faster at high temperature, and sometimes constipation occurs when the green feed is insufficient, which is also the reason for the low pregnancy rate of sows.

Solution: the nutrition of lean sows should be strengthened, the proportion of vitamins and fish meal should be added to the feed, and the dry feed should be changed to dilute feed, which should be fed 3-4 times a day to improve the nutritional deficiency.

3. Sows are overfat

Some sows have a low lactation during lactation, a small number of piglets, and some pig farmers will be fed high-energy diets. Such a long-term unlimited feeding will lead to no weight loss when sows are weaned, on the contrary, a large amount of fat will be deposited, resulting in obesity, causing the development of sows' follicles to stop developing and affecting normal estrus.

Solution: for sows with low lactation, we should limit feeding, adjust feed formula, maintain proper exercise of sows, and control the weight of sows, so as not to affect estrus mating.

4. Infection disease

It is a period of high temperature in summer, when bacteria are active, when the possibility of infection is greater. Common diseases are small, basket ear and endometritis. Infecting small sows may affect stillbirth. Basket ears and endometritis may lead to miscarriage of sows, which will also affect the next estrus of sows.

Solution: to do a good job in the environmental sanitation of the pig house, clean frequently, disinfect regularly, so as to avoid the breeding of a large number of bacteria, vaccination to prevent diseases, timely treatment of diseases.

The above is the summer sow non-estrus reasons and solutions, hope to help you, want to know more related knowledge, please pay attention to us.