The sow has a compensatory effect and the tolerance range for nutrition is quite large. To prevent excessive loss of maternal nutrition, the maintenance, embryonic development, and nutrient required for lactation should be considered to maintain long-term high reproductive efficiency of the sow. Not affected by nutritional factors. Sows generally have to consider the growth of nutrition in addition to female pigs after mating and fertilization, the diet is often given in the pre-pregnancy period (0 to 90 days), late pregnancy (90 days a minute) and lactation period for nutrition. In the early stages of pregnancy, nutrition can be provided to maintain the required nutrients; and nutrient supply during lactation is required to provide nutrients for lactation, in addition to maintenance. Energy and protein are two major requirements for nutrition. In terms of energy, in the pre-pregnancy period to maintain energy, metabolic energy (ME): 105kcal/W0.75, digestive energy (DE): 110kcal/W0.75, considered in the late pregnancy The development of embryos should be given 2 to 3 Mcal per day, and the energy required for lactation is about 20 Mcal/day, but due to the intake problem, only about 16 to 17 Mcal/day can be taken, resulting in weight loss of the sows. In the nutritional requirements of protein, sows are more tolerated and the amount given in pregnancy is not less than 150g per day, which will not affect the reproductive performance. However, during the lactation period, the need for milk protein must be taken into account and a large amount of supplements are needed. General recommendations Given 650~700g daily, it will not affect the reproductive performance of sows.
