The hot summer weather often results in a decrease in the conception rate, lactation performance, and litter size of sows, as well as increased yield and mortality of sows. It can be said that the adverse impact of hot summer weather on sows is an important reason for the vicious circle of pig farm production management. Here are some lessons from summer sow rearing and health care as follows:

1. Do a good job of sunstroke prevention and cooling of sows to prevent heat stress

Heat stress causes decreased sow fertility, low ovulation, multiple stillbirths, and increased sow mortality. In summer, the sow’s sunstroke prevention and cooling work should be done. In combination with ventilation and other cooling measures, the ventilation of the pig house should be strengthened to promote evaporation and heat dissipation. The traditional pig farms should open all the doors and windows to allow air convection. Conditioned pig farms should be equipped with a water curtain type cooling system, and the normal temperature can be reduced by 3 to 5°C. Construct pergola on the open-air sports ground for growing and bred pigs' houses and lay a shade net to wash the pig body with cold water or install spray device at high temperature and high humidity. Spray 4 to 6 times a day; the nursing sows in the farrowing house are preferred The way in which the dripping water cools drops on the lower neck near the shoulder.

2. Adjust feed formulation to ensure proper nutrition

Heat often affects the sows’ appetite, causing their feed intake to decrease and their heat production to increase. Appropriate nutrient level is a decisive factor in improving the health level and breeding performance of breeding pigs. Therefore, the feed formulation should be adjusted in time to improve the palatability and nutrient concentration of the feed so that the sows can meet the nutritional needs in the case of reduced feed intake. . 0.2% of active peptides and 0.2% of baking soda can be added to the sow diet, and the conditional farm can also feed some green and juicy feeds, which can enhance the ability of the sow to resist heat stress.

3. Provide sufficient cool drinking water to prevent sow body temperature from rising

In high temperature environment, pigs mainly rely on evaporation of water to dissipate body heat, and cool drinking water can also cool the sow's body. In summer, the demand for sow drinking water increases, and if the drinking water is insufficient or the water temperature is too high, the heat resistance of pigs will be reduced. Sows must be provided with enough cool drinking water every day. The pig farms that use drinking fountains should check whether the drinking fountains can supply water regularly; the pig farms that use the water supply tanks should frequently change the water. Experiments have shown that in summer, in order to reduce the heat stress of sows, the temperature of drinking water should not exceed 20°C, which is beneficial to sow body cooling and increase feed intake.

4. Adjust the feeding time

In summer, the sows’ daily feed intake is reduced during the day. Sows feeding time should be adjusted to take full advantage of the fact that the daily weather is relatively cool and the sows have a good appetite feeding period. Should avoid hot noon, the feeding time is adjusted to 7am in the morning and adjusted to 6pm in the afternoon to increase the feed intake of the sows. When lunch is required, the feed can be wetted to increase the palatability and increase the appetite of the lactating sows under heat stress.

5. Reduce the impact of various stress factors on sows

Sows should be subjected to stress and irritation as little as possible, and the number of sows and pregnant sows must be reduced as much as possible to avoid abortion and increase in stillbirth due to mixed groups. Try to keep the surrounding environment inside and outside the pig house quiet, especially if pregnant and lactating sows should avoid too much interference from the outside world. Improve the responsibility of the breeders and avoid any rough actions to reduce the loss of embryos or abortion of sows.

6. Make healthy work of sows

Especially during the perinatal health care work, antibiotics were added to the sow material before and 1 week after the sow was sow, and 100% of the original broth was used to purify the sow disease and sterilize the sow and cut off the disease from the sow to the piglet. The level of spread. Pay attention to the sow's postpartum one-needle. Sows use long-acting oxytetracycline or intramuscular injection of Houttuynia cordi penicillin within 6 hours after delivery, and sows injected by artificial labor should be injected twice.

Observe the pigs more often than usual to promptly treat the sows that show anorexia and inability to eat. For sows with harder defecation, use a laxative (for example, magnesium sulfate MgSO 4 ) every 23 days before delivery. The sow is dosed at a dose of 30 grams to prevent milk shortage due to constipation; midwifery sow is assisted and treated as necessary.

Sows with heat stroke should immediately move the sick pigs to a cool and ventilated place for emergency treatment. The pigs should be sprayed with cold water. At the same time, intravenous injection of 5% glucose saline 200-500 ml, VC 10-20 ml; intramuscular injection of analgin 10-20 ml . Unsettled person, intramuscular injection of 2.5% chlorpromazine 24 ml; heart failure coma, intramuscular injection of 10% sodium sulfate coffee 5 to 10 ml or 10% camphorsulfonic acid sodium 10 ml.

7. Regular deworming

The ectoparasites such as cockroaches make the sows restless and affect the normal feeding. Therefore, the sows must use high-safety drugs to deworm them before giving birth. Use "Kenvi" (main component is ivermectin). , fenbendazole and synergist) were added at 350 g/ton and fed for 1 week. Can also use "Kenwei off" injection, according to 1ml/33kg body weight injection, have better results. Regularly put caustic soda, trichlorfon and other drugs on the sewage drains of pig farms to kill eggs and larvae of mosquitoes and flies.

8. Be alert to the hazards of feed mycotoxins

Pigs are sensitive to mycotoxins and deteriorating feeds, and if fed with moldy, rancid, toxic, or irritating feed, they can cause miscarriage or embryonic death. When preparing sow feed, it is forbidden to use inferior raw materials. During the rainy season or high humidity season and high incidence of respiratory diseases, new mycotoxin treatment agents should be added to the pig feed to prevent the mycotoxins in the feed from harming the health of the herd. The keeper should clean up the residual feed in the sow trough before going off work every day to prevent the sow from eating acidified spoilage feed.

9. Pay attention to the cleanliness and disinfection of pig houses

Summer is the season when the growth and reproduction of pathogenic microorganisms are very active. Disinfection is a good way to cut off the transmission route of diseases and kill or clear pathogens that stay on the surface of pigs. To avoid the occurrence of porcine infectious diseases, pig farms must pay attention to pigs. The cleanliness and disinfection work of the homes, currently the domestic market for disinfectant drugs, the farm must select the disinfectants produced by the veterinary drug GMP certified manufacturers to ensure the quality of the disinfection, and the environment inside and outside the house, including the barn, venues and equipment, equipment, Disinfection of drainage channels, air and sow's entire body surface, etc., should also pay attention to some health corners, such as the disinfection of pigs' benches, sewage ditch, storage tanks, food troughs and other places and facilities. The pig house should maintain a good hygienic state and keep the barn ground dry, which can relatively reduce the occurrence of sow limb diseases.

10. Pay attention to the farm greening work

The greening of pig farms can regulate and improve the microclimate environment in the field and reduce summer heat radiation. Photosynthesis of plants absorbs carbon dioxide and releases oxygen. According to relevant experts' experiments, it is proved that doing a good job in the greening of pig farms will allow the pig farms to be shaded everywhere. In summer, the ambient temperature of the pighouses can be reduced by 3-4°C and the heat radiation can be reduced by 80%.

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Fluorochemicals

Organic Fluorochemical Compound,FluorineCompounds,Containing Benzoic Acids

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