How to raise pregnant sows in winter

? (1) reduce the number of embryo deaths

After pregnancy, the zygote was easily affected by various factors in the early stage of implantation from 9 to 13 days after pregnancy. the second death peak appeared in the third week after pregnancy, and the number of 2 deaths accounted for 30%-40% of the total number of zygotes. The third death peak occurred 60-70 days after mating. In production, the environment of pig house can be improved and embryo loss can be reduced to a minimum by strengthening feeding management. The temperature of the pigsty is maintained at 16-22 ℃ and the relative humidity is maintained at 70%-80%. After mating, the feed quantity should be reduced to the original lower level, but the high quality and full price should be guaranteed. Keep the enclosure clean and hygienic and reduce the chance of infection.

(2) choose the appropriate feeding method

1. Catch two heads in the middle: this method is suitable for poor sows. That is, 20 days before mating and 10 days after mating, concentrate was fed mainly by green fodder after recovery, and fed according to the feeding standard until 80 days of pregnancy, but the nutrition level in the later stage should be higher than that in the early stage.

two。 Pre-coarsening and finishing: this method is suitable for parturient sows with good pre-breeding condition. That is, in the early stage of pregnancy to feed more fine feed, and then feed concentrate in the later stage.

3. Step by step "climbing": this method is suitable for parturient sows and sows bred during lactation. In the early stage of pregnancy, mainly green roughage, gradually increase the proportion of concentrate, and correspondingly increase the protein and minerals in the feed. It should be noted that the diet of sows should be reduced by 10% to 20% one week before parturition.

? (3) to provide adequate nutrition for mothers and offspring

The nutrients obtained from the diet of pregnant sows first meet the growth and development of the fetus, then supply their own needs, and store some nutrients for lactation. Therefore, to meet the supply of nutrients is necessary to ensure the normal growth and development of sows and fetuses. Therefore, in production, in addition to providing sufficient energy and protein feed for sows, it is also necessary to provide adequate reproductive nutrition for pregnant sows. Adding 1% of Liuming No. 1 can ensure to meet their reproductive nutrition needs.

? (4) use reasonable feeding techniques

The diet fed to pregnant sows should not only pay attention to hygiene and ensure quality, but also have a certain amount of green roughage to make the sows feel full and not oppress the fetus. Green roughage is rich in amino acids, vitamins and trace elements, which is conducive to the normal growth and development of the fetus. And provide plenty of drinking water at the same time. In addition, it is strictly forbidden to feed moldy, frozen, poisonous and strongly irritating feed, otherwise it is easy to cause abortion; do not change feed varieties at will. Feed green coarse fodder less frequently, so that sows can drink clean water at any time.

? (5) feeding before and after pregnancy

About 20 days after pregnancy, the embryo of sows is easily affected by environmental conditions, so special care should be given in feeding and management, and high-quality full-price feed should be given. In the last month of pregnancy, on the one hand, the weight of the fetus increases rapidly, which requires a lot of nutrients, on the other hand, due to the increase in the volume of the uterus, the digestive organs are squeezed, which is easy to cause insufficient feed intake of pigs. Therefore, moderate increase of feed nutrition concentration and addition of Liuming No. 1 in one month before delivery can provide key reproductive nutrition for sows and promote the development of fetal intestinal and immune organs and body weight gain.

? (6) earnestly strengthen management

Pregnant sows had better be raised in a single circle, the circle surface should be flat, dry and clean, and keep warm in winter and cool in summer. The fertilizer accumulation pit should be shallow and the slope should not be too steep.

In the first month after pregnancy, sows should eat well, sleep well and exercise less, so as to restore their physical strength and fatness, but sows should be given more exercise during pregnancy and reduced in the later stage. The activity should be stopped one week before delivery. Stop exercising in rainy, snowy or too cold weather to prevent miscarriage caused by slipping or severe contraction of the uterus caused by cold. It is strictly forbidden to whip sows, do not drive, prevent crowding and fast turns and so on. If there is a sign of abortion, progesterone should be injected in time.

? (7) make good preparations for prenatal care

The weather is cold in winter and spring, so we need to do a good job of preventing wind and keeping warm. It is best to set up a special delivery room for sows, which is required to be warm and dry, with a humidity of 65%-75%, comfortable and quiet, sufficient sunshine, fresh air and a temperature of 22-23 ℃. In order to ensure the control of temperature and humidity, the parturient is sprayed in the delivery room and on the sow bed to remove moisture and moisture, inhibit the reproduction of pathogenic microorganisms and reduce the incidence of disease. For the sows with good body condition and breast development, the diet should be reduced from 3 to 5 days before delivery, which should be gradually reduced to 1 × 2 or 1 × 3 of the feeding level during pregnancy, and the green succulent feed should be stopped. For those sows with poor physical condition and breast dysplasia, not only do not cut the diet, but also should be fed some feed rich in protein and vitamins. Drive the sows to the delivery room 3-5 days before delivery, and prepare parturient equipment and adequate bedding.