What if sows are difficult to raise in summer?

Hot and humid weather in summer is easy to cause heat stress, reduce feed intake, affect the digestive system, and increase the incidence of postpartum "triad" and constipation of sows, thus increasing the difficulty of sow feeding management and reducing the economic benefits of pig farms.

1. Pay attention to the influence of temperature.

High temperature environment will cause adaptive changes in metabolism and endocrine of lactating sows, which will adversely affect the feed intake, lactation and reproductive performance of sows. Generally, the suitable temperature for lactating sows is 20-22℃. When the ambient temperature is higher than 25℃, the feed intake will drop sharply. When the feed intake of sows decreases, the growth rate of piglets will decrease under hot conditions. This is because when the ambient temperature is higher than 25℃, the high temperature will reduce the blood flowing into the breast, thus reducing the nutrients needed for milk production. By regulating the secretion of hormones, cell metabolism and distribution of nutrients related to lactation, the lactation of sows will be reduced, thus hindering the growth and development of children.

Therefore, it is necessary to adopt appropriate methods to control the temperature: (1) install a wet curtain; (2) pigsty insulation.

2. Pay attention to the regulation of feed nutrition

The influence of high temperature on feed nutrition is mainly divided into two aspects. On the one hand, it affects the feed intake. In the range of 17-26℃, the daily feed intake of lactating sows decreased 150-200g/ head every time the ambient temperature in piggery increased. On the other hand, mildew and rancidity of feed lead to mycotoxin, odor and toxicity.

Regulation methods: Improve the nutrition of the diet of lactating sows, especially the energy level and amino acids, and add 2-4% oil and proper amount of lysine (0. 1%-0.2%) to the diet of lactating sows in summer, so that the digestible energy level of the diet can reach 14.2MJ/kg, and the lysine level can reach above 0.9%; Increasing the proportion of green feed, the feed should be fresh and hygienic without mildew, which can obviously improve the nutritional intake of lactating sows.

Add VC and VE to the feed. Baking soda: 250mg/kg feed can reduce the adverse effect of heat stress on activity, and 0.8% feed for nursing sows can reduce respiratory alkalosis and improve the ability of resisting heat stress;

VC200-500mg/kg and VE200mg/kg can improve the immunity, enhance the anti-stress ability, increase the feed intake and daily gain of pigs. When the temperature exceeds 34℃, 400 mg of VC and VE200IU of VE are added to each kilogram of feed.

3. Pay attention to the prevention and treatment of constipation

Pay attention to the reasonable exercise and illumination of sows, and ensure adequate green feed and clean and healthy drinking water.

4. Pay attention to the prevention of triads.

Prevention and treatment of metritis: after delivery, intramuscular injection of appropriate antibiotics, such as cephalosporin, amoxicillin, penicillin, etc. Intrauterine injection of drugs such as Gong Yan Pill or Gong Yanjing, and then oxytocin to promote the discharge of intrauterine pollutants and avoid uterine infection;

Prevention and treatment of mastitis: isolate piglets and milk them from diseased mammary glands;

Prevention and treatment of agalactia or hypogalactia: the disease can reduce the milk yield of sows, even lead to poor lactation ability of sows, small weight, malnutrition, emaciation and even death of piglets at 2 1 day.