The replacement of gilts before the gilts open before the control requires good growth, should not be too fat, after weighing 75 kilograms, it should limit the intake of concentrate feed, 2 to 2.5 kilograms per day is appropriate, can supply 1 to 2 Kilograms of grass or carrots, etc. The gilts should be given more exercise and sufficient light should be given.

The gilts that are to be fed with short-term sows and gilts at the age of 210 days and have a body weight of 105 kilograms are fully mature physically and physiologically. At this time breeding breeding can increase the service life of sows, and the piglets produced are particularly sturdy.

The estrus sow is suitable for sows with timely estrus symptoms (12 hours is the best breeding time when the boar is crossed or artificially tested or stands up without seeing boars). After 8 to 12 hours, the gilts are bred. Once, you will generally get better breeding results and get higher litter size. If the sows are treated before the mating, the mating effect is better, because the promoted No. 3 can promote the maturation and concentrated discharge of the eggs, thereby increasing the conception rate and increasing the number of litters.

In the first trimester of pregnancy, control of feeding determines the concept of sow fertility, and it will enter the pre-pregnancy (86 days before pregnancy) management phase. Pregnancy should pay special attention to feed intake and nutritional levels. Strictly control the daily feed intake of sows, limit feeding, prevent over-fertilization, and feed 1.8 to 2 kg per day as well.

During the late period of pregnancy, timely feeding and rearing of sows for feeding and management during the later period of pregnancy (day 86 from pregnancy to delivery) should pay special attention to late feeding and raising the level of feed nutrition.

In addition to formulating procedures, the scientific epidemic prevention should not only prevent swine fever, disease No. 5, and streptococcus from epidemic prevention according to the regulations, but also timely inject vaccines such as parvovirus, pseudorabies, and blue-ear disease to the sows to be sowed to prevent sows. Abortion, stillbirth, mummy, etc. The sows should be injected with red peony and yellow peony vaccine within 1 month before birth to prevent postpartum piglets from squatting.

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