What problems plague pig farms in summer?

The weather is getting hotter and hotter in summer, and problems that plague pig farms, such as "difficult temperature drop, difficult humidity control, difficult pregnancy of female animals, difficult rearing of offspring, and difficult disease treatment", also appear immediately. These problems make the benefit of raising pigs worse. How to "solve problems"?

1 five questions about difficult pig farms.

1. 1 It is difficult to lower the temperature and control the humidity.

Pigs are warm-blooded animals with thick subcutaneous fat and underdeveloped sweat glands. Therefore, the high temperature and high humidity environment in summer has great influence on the production and reproductive performance of pigs, such as feed intake, daily gain, feed utilization rate, pregnancy rate and litter rate of sows, sperm quality of boars and survival rate of piglets. Production practice has proved that when the ambient temperature reaches above 30℃, if no cooling measures are taken, all kinds of pigs (except suckling piglets) will be in a state of heat stress, and the health status and production performance of pigs will be greatly affected. Sows will not be in estrus, the conception rate and litter size will be significantly reduced, and the sows born will be agitated, feed intake will be reduced, lactation will be reduced, and weight will be reduced more. As a result, piglets are lighter in birth weight, slower in weight gain and lower in survival rate. The mating and sperm production ability of boars decreased; Fattening pigs are prone to weight loss, slow growth, decreased feed utilization rate and daily gain of pigs, and even died of heatstroke. Therefore, in the hot summer, it is necessary to strengthen the heatstroke prevention and cooling work, control the environmental temperature in the pig house, ensure the safety of raising pigs in summer and improve the efficiency of raising pigs.

1.2 It is difficult for a mother to conceive and for her offspring to raise.

In summer, due to the high environmental temperature, the boar's sexual desire decreases, the emotional fluid is thin, the dead sperm and weak sperm increase, and the sperm vitality decreases obviously, which is the direct reason for the low pregnancy rate of sows. Secondly, at higher ambient temperature, it is difficult for sows to dissipate heat, and the feed intake is reduced, and the nutrients needed for sow reproduction are insufficient, which leads to irregular ovulation in estrus; The stability of vitamins in feed is poor, which leads to the lack or deficiency of vitamins in feed, and also affects breeding and pregnancy. The amount of exercise is small. , stillbirth and weak fetus can occur in sows. In addition, porcine parvovirus disease, atypical swine gangrene, swine epidemic encephalitis B, swine leptospirosis, swine uterine infection, porcine reproductive and respiratory syndrome (blue ear disease), swine toxoplasmosis and swine eperythrozoonosis are also important reasons for sow pregnancy difficulties.

It is difficult for sows to get pregnant, resulting in a mating pregnancy rate of only half of the normal pregnancy rate in July and August, resulting in a decrease in litter size in 1 1 and 65438+February of that year, which directly affects the number of fattening pigs in May and June of the following year.