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Reasons and measures for sows not estrus after weaning
Reasons why sows are not estrus after weaning: First, the nutritional level is not enough, especially vitamins and energy in the feed. Second, premature mating of sows, often lead to abnormal second child estrus. Third, the lack of boar stimulation Sow is too far away from the boar, weaning sow was not due to sexual stimulation, resulting in no estrus. 4. Temperature, light and lack of exercise When the ambient temperature exceeds 30 degrees in summer, the ovaries and estrus activity of sows are inhibited. Five, feed raw mildew on the normal estrus zoster most affected is zeotoxin, especially zearalenone. After sows consume feed containing this toxin, their normal endocrine function is disrupted, leading to abnormal estrus. Six, ovarian dysplasia. Seventh, sows have reproductive disorder diseases such as swine fever, blue ear disease, pseudorabies, parvovirus, Japanese encephalitis virus and Eperythrozoon and other pathogenic factors will cause sow flu and other reproductive disorders. Measures to prevent sows from estrus after weaning: The key to reducing the loss of sows during lactation is to control the nutrient level and feed intake of the feeding material; appropriate reductions should be made 3 days before weaning, and short-term feeding and aphrodisiac should be performed before weaning until breeding. The amount of material is 3 kg of milk feeding material per day; after 10 days after weaning, no estrus can be intramuscularly injected with 1 to 250 units of crude hormone of pregnant horse serum, 500 units of chorionic gonadotropin, and then kept in the same sports field as the boar. Chasing sports, generally 2 to 4 days can be heat.