Feeding and management of winter sow pregnant sows
The cold weather in winter and spring and the short sunshine time have adversely affected the normal growth and development of pregnant sows, and attention should be paid to strengthening feeding and management.
First, reduce the number of embryos died
After the sow became pregnant, the zygote was susceptible to various factors in the initial stage of the ninth to thirteenth day of planting, and the second death peak occurred on the third day after pregnancy. The two deaths accounted for 30% of the total number of zygote. ~40%; the third peak of death occurs 60 to 70 days after mating. Production can be improved by feeding and management to improve the environment of the pig house and minimize the loss of embryos. The temperature of the pig house is maintained at 16-22°C, and the relative humidity is maintained at 70%-80%; the amount of feed after mating should be reduced to the original low level, but the quality full price should be guaranteed, keeping the house clean and reducing infection. Opportunity.
Second, choose the appropriate feeding method
Generally the following three methods can be used: (1) Grab the middle between the two. This method is adapted to poorly prepared sows. That is to say, the concentrate is fed 20 days before the breeding and 10 days after the breeding. After the body condition is restored, it is mainly fed with green fodder and fed according to the feeding standard. After 80 days of pregnancy, supplements are added, but the nutritional level in the later period should be higher than the previous period. (2) After the rough coarse. This method is suitable for mating sows with good precursors. That is, in the early pregnancy more green feed, and later feed fine material. (3) Ascend step by step. This method is suitable for the production of sows and breeding sows during lactation. That is, in the early stages of pregnancy, mainly roughage, and gradually increase the proportion of concentrate. Increase the protein and minerals in the feed accordingly. However, care should be taken to reduce the diet by 10% to 20% in the first week of sow production.
Third, supply the mother sufficient nutrition
The nutrients obtained from the diet of pregnant sows first satisfy the fetus's growth and development, and then supply their own needs, and store some nutrients for breast-feeding. Therefore, satisfying the supply of nutrients is necessary to ensure normal growth and development of sows and fetuses. Therefore, in addition to supplying enough energy and protein feed for sows, it should also ensure that vitamins and minerals are met.
Fourth, the use of reasonable feeding technology
The diet fed to pregnant sows, in addition to stressing hygiene and quality assurance, must also have a certain amount of green roughage, so that the sow will feel full after eating, and will 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, while providing adequate drinking water. In addition, it is forbidden to feed mildewed, frozen, poisonous, and irritant feedstuffs, otherwise it is easy to cause miscarriage, and at the same time, the feedstuffs are not changed at random. Feeding green roughage should be less frequently fed, and sows should be allowed to drink clean water at any time.
V. Rearing of Pregnancy
About 20 days after the sow is pregnant, the embryo is easily affected by environmental conditions. Special care is required for feeding and management, and high-quality full-priced feed is given. In the last month of pregnancy, the fetus’s weight increases dramatically. Need a lot of nutrients; the other hand, due to the increase in the volume of the uterus, digestive organs are squeezed, easily lead to insufficient feed intake of pigs. Therefore, nutrient-rich diets, especially protein feeds, should be fed.
VI. Practically strengthen management
The focus of management of pregnant sows is to do a good job. In the daily management, attention should be paid to the following points: The pregnant sows are best kept on a single lap, the dough should be flat, dry and clean, and kept cool in winter and cool in summer. The compost pit should be shallow and the slope should not be too steep. During the first month after a sow is pregnant, she should eat well, sleep well, and exercise less in order to restore her strength and sensation. However, she should exercise more during her pregnancy, and she should reduce the amount of exercise in the later period so that her sows can move freely. The activity should be stopped in the first week. Rain, snow, or too cold weather should stop exercising to prevent slipping or abortion due to severe contraction of the uterus caused by freezing. It is forbidden to whip, cross the ditch to cross the gate, slow down, prevent crowding and fast driving, sharp turn and so on. If there are signs of miscarriage, progesterone should be injected promptly.
Seventh, do a good job of prenatal preparation
The cold winter and spring seasons require good weather protection. It is advisable to set up a special delivery room for the sow. The maternity room is required to be warm and dry. The humidity should be kept between 65% and 75%. It should be comfortable and quiet, with sufficient sunshine and fresh air. The temperature should be kept at 22-23°C. For sows with good lyrical and well-developed breasts, 3-5 days before birth should be reduced, gradually reduced to 1/2 or 1/3 of the feeding level during pregnancy, and green-blue juicy feed should be stopped. For those sows with poor body condition and poor breast development, not only do they not reduce the material before giving birth, they should also feed some feed rich in protein and vitamins. The sows are rushed to the delivery room 3 to 5 days before delivery, and are ready for delivery and adequate bedding.
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