The high incidence of colonization disorders, the harm brought to the pig farm can not be ignored. We mainly introduce the reproductive factors that affect environmental factors. These factors can be avoided by taking the necessary measures in current production.
1. The environment of the pig house directly affects the reproductive performance of the sow. Especially in the summer, the sow house did not adopt measures to prevent heatstroke, and the excessively high ambient temperature caused heat stress, which could easily lead to endocrine disorders in the sow, resulting in irregular sows in the estrus, or oestrus, and may cause sow embryo death in sows. Stillbirth or abortion When the temperature is above 32°C, the return rate of sows is 19.7%.
2. Poorly ventilated sow houses, over-breeding densities, air pollution, etc. can also affect the sow's reproductive performance, causing irregular sows' estrus, reduced fertility rates, reduced litter size after mating, and increased stillbirth. Air pollution, when ammonia, methane, hydrogen sulfide and other toxic gases increase, sows can be abnormal estrus, mating after pregnancy, less litter size, stillbirth and more.
3, toxins. In particular, the mycotoxins F2 and T2 in the feed can cause false estrus in the sow, even if the real estrus, mating infertility, pregnant pigs abortion stillbirth.
4. Poisonous chemicals, pesticides, gossypol poisoning, and sows suffering from heavier diseases can cause miscarriage and stillbirth. In particular, reproductive disorders such as infertility and abortion caused by endometritis and low birth weight (endocrine endometrium) have become a major disease in non-infectious sows.
5. The environmental factors in the pen homes are also important factors affecting the pig production. Dark, wet, poor sanitation, lack of light, lack of playgrounds, ambient environment such as noise interference, air pollution and other factors can cause the sows not to be estrus.
6. Poor sanitary conditions in the sow house, especially in the delivery room and gestation room, can easily cause the sow's metritis and lead to the decline of the sow's reproductive performance.
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