Generally speaking, you can choose the following three feeding methods: First, give consideration to both sides and the middle. This method is suitable for multiparous sows with weak constitution. That is to say, concentrate should be fed 20 days before mating and 10 day after mating. After the recovery of physical condition, we should give priority to green feed, feed it according to feeding standard until 80 days of pregnancy, and add concentrate, but the level of nutritional components in the middle and late stage is higher than that in the early stage. Second, the former is rough and the latter is fine. This method is suitable for multiparous sows in good health before breeding. That is, raise more green coarse grains in the early stage of pregnancy, and then feed concentrate in the middle and late stages. The third is the step-by-step method. This method is suitable for primiparous sows and lactating sows. That is, in the early pregnancy, green roughage is the main feed, and the proportion of concentrate is gradually increasing, which correspondingly increases the protein and minerals in the feed. However, it should be noted that the amount of breast feeding in the week before delivery should be reduced by 10% ~ 20%.
The diet of pregnant sows should be well maintained. In addition to hygiene, quality and quantity, there should be a certain amount of green roughage to make sows feel full after eating, and it is not easy to squeeze the fetus. Green coarse grains contain carbohydrates, vitamins and nutrients, which is beneficial to the normal growth and development of babies and provides a lot of drinking water. In addition, it is forbidden to feed moldy, frozen, virus-carrying, and highly irritating feed, otherwise it will easily lead to abortion; At the same time, don't change the feed types casually, feed less green roughage, and let sows drink clean water anytime and anywhere.
After 20 days of pregnancy, the test-tube embryos of sows are very easily affected by the natural environment, so special policies should be given in the management methods of feeding and high-quality complete feed should be given; In the last month of pregnancy, on the one hand, the rest of the fetus has been greatly improved and needs a lot of nutrition. On the other hand, due to the increase of uterus volume, the digestive system is squeezed, which easily leads to insufficient feed intake of sows. Therefore, we should improve the nutritious diet, especially protein feed.
Second, ensure nutrition.
The nutrients that sows get from their diet during pregnancy must first achieve the growth and development of the fetus, and then provide their own needs and store some nutrients for breastfeeding. Therefore, it is very important to ensure the normal growth and development of sows and fetuses and realize the supply of nutrients. Therefore, besides providing sows with sufficient kinetic energy and protein feed, they should also meet the needs of vitamins and minerals.
Third, strengthen management.
Management methods The key of pregnant sows is to do a good job of fetal placement. In the daily management methods, we should pay attention to the following aspects:
It is best to feed sows in a single circle during pregnancy, and the road surface should be flat, dry and clean. The cesspit should be shallow and the inclination should not be too steep. In the first month of pregnancy, sows should eat well, sleep well and exercise less to restore vitality and fat. However, they should be allowed to exercise moderately in the second trimester of pregnancy, and the exercise intensity should be reduced in the middle and late trimester, so that sows can move freely, and the theme activities should be terminated one week after delivery. Theme activities should be terminated in rainy and snowy weather or when the temperature is too cold, so as to prevent the sow from falling down or the uterus from collapsing strongly due to cold, leading to abortion. Whipping is forbidden. Sows should cross ditches and doors slowly to avoid crowding, rushing and sharp bends. If there are signs of miscarriage, progesterone should be injected immediately.
Do a good job of wind, cold and warmth before labor. It is best to set up a professional waiting room for sows. The waiting room needs to be warm and dry, with an ambient humidity of 65% ~ 75%, comfortable and quiet, full of sunshine, fresh gas and a temperature of 22℃ ~ 23℃. For sows with good fat and breast development, the feed should be reduced 3-5 days before delivery, and gradually reduced to 1/2 or 1/3 of the feeding level during pregnancy, and the feed with green juice should be stopped. For these sows with weak physical condition and hypoplastic breasts, not only do they not reduce the feed before delivery, but they also need to be fed with some feed containing protein and vitamins. 3 ~ 5 days before delivery, the sow should be rushed into the waiting room, and at the same time, pregnant women's delivery supplies and sufficient bedding materials should be prepared.