At 9 ~ 1 1 ~ 2 am before labor, 98.2% of sows can be delivered the next day by injecting cloprostenol injection 1 ~ 2 ml into the neck muscle of sows, the effective rate is as high as 100%, and the survival rate of piglets is over 98%.
2. Let sows give birth in spring and autumn.
Sow delivery is arranged in spring and autumn, which can improve the survival rate of piglets and realize five births in two years. 1 The fetus can be mated in11~ 65438+February and delivered in March ~ April of the following year; The second child is scheduled to be conceived in May-June and born in September-10.
3. Improve the farrowing rate of sows.
From 3 days after weaning to estrus, sows are fed 400 mg of vitamin B complex, 400 mg of carotene and 200 mg of vitamin E every day. After mating, the dosage is halved and fed for another 3 weeks, and each fetus can have 2 ~ 3 more piglets.
4. Early diagnosis of sow pregnancy
After 3 ~ 4 weeks of sow breeding, press the back between the ninth thoracic vertebra and the second lumbar vertebra with thumb and forefinger. If your back is slightly arched, it means you are pregnant. If your back is sunken, it means you are not pregnant.
5. Estimate the expected delivery date of sows
The expected date of delivery is 3 months plus 3 weeks and 3 days. For example, the date of sow breeding is April 20th, and the expected date of delivery is: 4+3 = 7 (months), 20+2 1 (3 weeks) +3 (days) =44 days, that is, August 13.
6. Artificial aphrodisiac method for sows
For sows that are not in estrus for a long time, take 20 ml of boar semen and slowly inject it into sow uterus with vas deferens, which keeps rotating and twitching back and forth. At the same time, sprinkle a small amount of semen on the sow's nose, strengthen feeding, and breed in estrus after 4 days. Sows weighing 75 ~ 100 kg will be in estrus in 4 ~ 6 days if they are injected with human chorionic gonadotropin 100 international unit or 5 ml pregnant horse serum subcutaneously.
7. sow lactation method
Wash the postpartum placenta of sow, cut it into small pieces with a length of 4 ~ 5cm and a width of 2 ~ 3cm, cook it with slow fire for1~ 2 hours, and mix the placenta with soup to make porridge. From the second day after delivery, feed the sow twice a day until it is finished. Sows that have been short of milk are fed with Akebia Akebia 30g, Angelica 20g and Astragalus 30g in soup and cooked placenta, and the effect is excellent. Or use 250 grams of kelp, soak and cut into pieces, add lard 100 grams, and feed 1 time in the morning and evening for 2 ~ 3 days, and the milk secretion can be greatly increased.
8. Timely breeding is the key.
The suitable breeding age is: local varieties are 6 ~ 7 months old and weigh 20 ~ 55 kg; The first generation hybrid sow is 8 ~ 9 months old and weighs 65 ~ 75 kg; The exotic lean-meat variety is 9 ~ 10 month old and weighs 1 10 kg. Adhere to the principle of "matching the old early, matching the young late and matching the old in China". 19 ~ 30 hours after sow estrus, when the swelling of sow vulva just begins to subside and filamentous mucus flows out, mating can be carried out, and the hindquarters of sow can be pressed to make it still.
9. Strengthen measures to protect the fetus
Sows 9 ~ 13 days after mating and 2 1 day before delivery are prone to miscarriage, so measures to protect the fetus should be strengthened and frozen moldy feed should be banned. For threatened abortion, 65438 000g of Astragalus membranaceus, 50g of Atractylodes macrocephala, 50g of Glycyrrhiza uralensis and 50g of Angelica sinensis, 50g of Radix Paeoniae Alba, 50g of Scutellariae Radix and 50g of Amomum villosum, and 75g of Radix Dipsaci can be decocted and taken. 2 doses a day for 3 days.
The management of sows, especially the healthy management of weaned sows, is one of the most important tasks in the whole pig farm. It can also be said that the success or failure of pig farm management depends largely on the efficiency of raising pigs. If the reproductive level of sows is not high, the sales of pig farms will be greatly affected. Therefore, breeding pig producers should maximize the productivity of sows when raising sows, and then improve the economic benefits of farms.