Selection of feed for sows

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 be changed according to the condition of sows.

1. The reserve sows are in the stage of growth and development. High-quality and nutritious feed is very important for the development of body shape and reproductive system of sows. 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.

two。 Weaning period refers to the period from normal weaning to pre-mating. Sows are usually in estrus for about a 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. Feed can not be suddenly changed, should choose the market sale of large pig feed or empty feed, within 3 days after weaning, gradually replace lactation feed or big pig feed. Add laxative bran and succulent green green fodder appropriately.

3. The first trimester of pregnancy 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, 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. Do not feed moldy, spoiled, frozen, irritating feed to prevent abortion.

4. The late stage of pregnancy refers to the stage from 80 days of pregnancy to fetal delivery.

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 feed should be gradually replaced by lactation and properly fed with bone soup. If conditions permit, dry fat or soybean oil can be added to the daily feed. The feeding method is fixed-time meal and quantitative feeding, and the appropriate daily feeding is 2.5-2.8 kg (depending on the fat condition of sows).

5. Lactation period refers to the stage 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 were fed with warm wheat bran soup + biochemical soup pills (3-5 pills / time) + brown sugar salt water 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 per day to restore their normal feed to 4-5 days. The deficiency or excess of certain nutrients in the diet will affect the feed intake of sows. Do not excessively increase the concentration of certain nutrients, so as not to cause nutritional imbalance. For example, the higher the energy concentration in the feed, the less the feed intake. While increasing the concentration of energy and protein in feed, attention should be paid to the supplement of disease-resistant nutrition (immune nutrition, reproductive nutrition, intestinal nutrition). Wang Baihui