The average sow's gestation period from weaning to estrus is 39 days, but the normal estrus mating is possible 5 to 7 days after weaning. However, 20% to 30% of sows still postpone estrus after weaning. So, how can we make the weaning sow estrus fast and effective? Should do a good job of the following points.
1. Strengthen feeding management. A sow with malnutrition or excess nutrients will make it estrus. Weaned weaned sows should be strengthened to raise, raise nutrient levels, increase precision feeds, reduce roughage, so that the rapid recovery of sensation, and promote their estrus; for sows to reduce excessive concentrates, increase roughage, strengthen exercise, so that Sows achieve moderate lyrical condition.
2. Change the circle. Weaned non-estrus sows after weaning to a new circle, so that it is combined with estrus sow breeding, through the estrus sow crawling, there is to promote sows estrus ovulation effect.
3. Use hormones to promote passion. (1) Triad hormone stimulation. For estrus-inducing sows, intramuscular injection of 3 to 4 ml of triad hormones for each head usually results in more than 97% of sows' estrus in 2 to 4 days, and 60% to 70% of estrus's sows in fetuses. After 21 days of estrus and mating, the estrus is again estrus. If 40 micrograms of ovulation hormone 2 is injected intramuscularly per sow for half an hour before sow mating, 37% of litter size can be increased. (2) Maternal serum gonadotropin and human chorionic gonadotropin are promoted. For sows with long-term estrus after weaning, each sineen's muscle is injected with 250-1000 units of sex hormones, 500 units of chorionic gonadotropins, and 80% of sows after 10 days. These estrus sows are mated. After that, 90% of sows can be affected.
4. Acupuncture treatment. Acupuncture for 10-15 minutes for the sows that have long-term non-estrus after weaning will have acupuncture treatment for 88% of the sows within 2 weeks and 68% of the sows will be available after mating. become pregnant.
5. Chinese medicine treatment. Yang Qishi 50 grams, Motherwort 70 grams, Angelica 50 grams, also 40 grams, dodder 40 grams, Epimedium 50 grams, 50 grams of Polygonatum, Rehmannia 30 grams, add water and fry twice to be mixed into 2 to 5 kilograms of Chinese herbal juice, Divided 3 times.
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