Different feed formulations for sows in different stages

Sow reproduction can be divided into five stages: preparation period, weaning period, early pregnancy stage, late pregnancy stage and lactation period. The selection and control of feed in these five stages should vary according to the condition of sows.

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The reserve period: the reserve sow is in the stage of growth and development, and high-quality and nutritious feed is very important to the body development and reproductive system development of the sow. In the feed selection of sows less than 6 months old, large pig feed (full-price pellet expanded material on the market) is equipped with green feed at 1:1 and is allowed to eat freely. Sows aged 6 months to pre-mating choose full-price pellet empty materials on the market and are equipped with green fodder at 1:1. At this stage, it is forbidden to use cottonseed cake, rapeseed cake and moldy feed that are harmful to the reproductive system. Feed restriction is appropriate to prevent sows from being overfat and affect estrus and ovulation.

Weaning period: the period from normal weaning to pre-mating. Sows can be in estrus about 1 week after weaning. Improper selection and control of feed at this stage will affect the breeding cycle of sows. Empty sows often appear weaning stress 1-3 days after weaning, which can easily cause mastitis, high fever and other diseases. At this time, it is very important to control the daily feed quantity combined with the fat and thinness of weaned sows. Two meals a day, quantitative feeding, must not be allowed to eat freely and cause the above-mentioned diseases. The choice of feed should not be changed suddenly. You should choose the big pig feed or empty pig feed sold on the market. Within 3 days after weaning, the lactation material should be gradually replaced with empty pig feed or big pig feed. Add laxative bran and succulent green green fodder appropriately.

Early pregnancy: it refers to the period from breeding to 80 days of pregnancy. The control of feed at this stage plays a promoting role in mating conception and increasing litter size. After mating, Konghuai sows continue to be fed in a limited amount, order meals regularly, and feed 2-2.5 kg per day (depending on the fat and lean body condition of sows), and appropriately increase green feed. After 20 days of feeding, the normal feed amount of sows was gradually restored. The choice of feed should be the full price of pregnancy material sold on the market. Do not feed moldy, spoiled, frozen, irritating feed to prevent abortion.

Late pregnancy: refers to 80 days after pregnancy to the fetal delivery stage. At this stage, the fetus develops rapidly, and the need for calcium and nutrition increases rapidly. Poor selection of materials can easily lead to paralysis of sows and weakness of piglets. This stage is what is usually called "attacking the fetus". The choice of feed should be gradually changed to lactation feed and properly fed with bone soup. If conditions permit, dry fat or soybean oil can be added to the daily feed to improve the birth weight and survival rate of piglets. The feeding method is regular meal and quantitative feeding, and it is appropriate to feed 2.5-2.8 kg per day (depending on the fat condition of sows). In addition, it should be noted that pregnant sows increase or decrease feed 7 days before birth. For the fat sows, the diet should be reduced on the basis of the original feed, so as to avoid excessive and thick postpartum milk, resulting in incomplete sucking of the piglets and mastitis; for the poor sows, feed should be added appropriately to meet the needs of postpartum lactation.

Lactation period: the period from childbirth to weaning of sows. The selection and control of feed during lactation is the top priority of the whole production process. The sows were not fed on the same day, and some warm wheat bran soup + biochemical soup pills (3-5 pills / time) + brown sugar salt water were fed twice in a row to promote lochia excretion and rapid recovery of physical strength. On the second day after parturition, the sows were fed with about 1 kg of feed, and then increased by 0.5 kg a day to restore their normal feed quantity in 4-5 days. After the appetite is normal, the sows are allowed to eat freely to ensure that the piglets absorb enough milk and maintain good reproductive performance. One week before the piglets are weaned, the lactating sows can gradually cut down the diet and gradually replace the lactation feed with empty feed. On the day of weaning, the daily feed amount of sows was maintained at 2.4-2.6 kg. Lactation materials should choose the lactation materials sold in the market, properly add soybean oil or dry fat, according to 1:1 equipped with green feed supply.