First, sow the daytime calving
At 9 to 11 am, 1 to 2 days before the sow's labor, injection of 1–2 ml of prostaglandin injection into the neck of the sow can allow 98.2% of sows to give birth during the day and have an effective rate of up to 100. %, the survival rate of piglets is above 98%.
Second, sow sows in the spring and autumn
Sows were arranged in the spring and autumn to improve the survival rate of the piglets and to achieve 5 births per year. The 1st child can be placed in the 11th to 12th months of mating, with calving from March to April of the following year; the 2nd child is scheduled to be mated from May to June, and the child is born from September to October.
Third, increase sows' calving rate
Three days after weaning, during the estrus period, sows are fed 400 mg of complex vitamin B, 400 mg of carotene, and 200 mg of vitamin E per day. After half-breeding, the dose is halved. After 3 weeks of feeding, each baby can produce more than 2 to 3 calves. head.
Fourth, early pregnancy diagnosis of sows
When the sow mates 3 to 4 weeks, the thumb and forefinger press the 9th thoracic vertebra to the lumbar back between the 2nd lumbar vertebrae. If the back is slightly arched, the pregnancy is indicated. The dorsum of the sow is not conceived.
V. Calculation of sows' expected date of birth
The mating date plus 3 months plus 3 weeks and 3 days is the due date. For example, the date of sow mating is April 20, and the expected date of birth is: 4+3=7 (months), 20+21 (3 weeks)+3 (days)=44 days, which is August 13.
Six, sows artificial aphrodisiac method
For long-term non-estrus sows, 20 milliliters of boar semen were used. The seminal fluid was slowly introduced into the uterus of the sow by the vas deferens, and the vas deferens was continuously rotated and twitched back and forth. At the same time with a small amount of semen sprinkled on the nose of the sow, to strengthen feeding. 4 days after the estrus breeding. If a sow weighing between 75 kg and 100 kg is injected intramuscularly with 100 units of human chorionic gonadotropin or 5 ml of human serum with subcutaneous injection, it can be estrus 4 to 6 days later.
Seven, sow lactation
The placenta of the sow postpartum is washed clean, cut into small pieces of 4 to 5 cm in width and 2 to 3 cm in width, and gently cook for 1 to 2 hours, and mix the fetal clothing with soup into the gruel. From the 2nd day after childbirth, sows are fed twice a day until feeding. The sows that have been suffering from short-acting milk have been fed with 30 grams of ginseng, 20 grams of angelica, and 30 grams of decoction of astragalus, which are fed together with cooked tires. Or use 250 grams of kelp, soak up and cut fine, add 100 grams of lard decoction, each day and evening feed 1 time, once every 2 to 3 days, the amount of milk secretion can be greatly increased.
VIII. Timely breeding is the key
Appropriate breeding ages are: local breed 6 to 7 months old, weighing 20 to 55 kg, hybrid sow 8 to 9 months old, weighing 65 to 75 kg, exotic lean type 9 to 10 months old, weight 110 kg. Adhere to the "old with early, small with the evening, not the old with the middle." Sows 19 to 30 hours after estrus, until the swollen red vulva just began to subside, and the outflow of filiform mucus, can be matched when the sow hindquarters stand still.
9. Strengthen the measures for the protection of fetuses
After 9-13 days of mating and 21 days before farrowing, the sows are liable to abortion. Measure should be strengthened and frozen and mildewed feed should be banned. Abortion aura can be used Astragalus 100 grams, Atractylodes, licorice, Chinese angelica, Angelica, Astragalus, Amomum each 50 grams, 75 grams continued, thick fried juice. Take 2 daily for 3 days.
Rose Flower,Jasmine Flower,Wild Chrysanthemum,Common Bombax Flower
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