Feed selection for sows at each stage
To maintain a good body condition and reproductive performance of sows, selection and control of sows at each stage of feed is one of the key measures in breeding. Sows breeding can be divided into four stages: backup period, weaning period, pre-pregnancy and late pregnancy. The selection and control of these four stages of feed should vary according to the condition of the sow. Backup period The gilts are in the stage of growth and development. High-quality, nutritious feed is essential for the sow's body development and reproductive system development. In the sow feed selection of less than 6 months of age, the large pig feed (preferably 1:1 with green feed) is allowed to freely feed. Sows from 6 months of age to pre-seedlings are selected for sale on the market (preferably 1:1 with green feed). It is forbidden to use cottonseed cake, rapeseed cake and moldy feed that are harmful to the reproductive system at this stage. Appropriate feed restriction to prevent sows from becoming overweight, affecting estrus and ovulation. Weaning period Empty period refers to the period from normal weaning to pre-breeding. After a sow is weaned, the estrus can be mated for a week or so. The selection and control of the material at this stage will affect the reproductive cycle of the pig. Empty sows often have weaning stress from 1 to 3 days after weaning, which can easily cause mastitis and high fever. At this time, it is important to control the amount of feed fed daily in combination with fattening sows. Two meals a day, quantitative feeding, must not allow them to freely eat and cause these diseases. The choice of material should not be changed suddenly. We should choose big pig feed or empty material on the market. Within 3 days after weaning, gradually replace the feed material with empty material or large pig feed, and increase the bran and bran. Greenish green feed. Pre-pregnancy Pre-pregnancy refers to the 80 days from pregnancy to pregnancy. The control of the material at this stage plays a catalytic role in breeding fetuses and increasing number of births. Empty sows continue to limit the amount of feeding after sowing, regular meals, feeding 2 kg to 2.5 kg per day is appropriate (depending on sows fat and thin body conditions), appropriate increase in green feed. After feeding for 20 days, the normal food intake of sows was gradually restored. The choice of feed should be full-price pregnancy material sold on the market. Feed moldy, spoiled, frozen, and irritating feeds to prevent miscarriage. Late pregnancy It refers to the stage of delivery to the fetus after 80 days of pregnancy. At this stage, the fetus develops rapidly, and calcium and nutrient needs increase rapidly. Poor material selection can easily cause sow pigs and pigs to be weak and sick. This stage is what is usually referred to as "craving." The choice of material should be gradually changed into a feeding material, and bone soup should be properly fed. If conditions permit, dry fat or soybean oil can be added to the daily feed to increase the pig's weight and survival rate. Feeding methods are regular meals, quantitative intake, daily feed 2.5 kg ~ 2.8 kg is appropriate (depending on the sows can be determined). In addition, it should be noted that pregnant sows increase or decrease the material 7 days before delivery. For sows with superior lyrical condition, reduce the feed on the basis of the original feed so as to avoid over-concentration of milk in the post-partum period, which may cause mastitis caused by unsuccessful sucking of pigs; and appropriate feeding of sows with poor lye to meet postpartum lactation Needs.
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