The nutritional status of sows can significantly affect the physiological function of sows. Sperm-egg binding, embryo implantation, embryonic development and other physiological processes are all dependent on sows in good nutritional status. These physiological processes affect litter size. The main factor is that if you want to give full play to the sow's reproductive performance and increase the sow's birth rate, you must fully meet the sow's reproductive nutrition. 1 Reproductive Nutrition of Energy Dietary energy and nutrition factors affect the follicular development of sows by altering the activity of the hypothalamus-pituitary-ovary axis. Lack of energy supply inhibits the production of gonadotropin-releasing hormone and the release of sex hormones in sows, leading to the promotion of follicular development. Insufficient production of gonadal hormones and gonadal hormones influences the growth and development of follicles in sows and maturation of oocytes. The deposition of large amounts of fat in ovarian tissues also affects the growth and development of oocytes and the growth and maturation of oocytes. 2 Amino Acid Reproductive Nutrition The ideal amino acid balance model can improve reproductive performance of sows. The amino acid requirements before and after the 70th day of gestation are very different. The requirement for lysine after the first day of sow gestation 7 days after pregnancy is 6. 83g/d and 15.26g/d. In addition, studies have shown that L-arginine converts to L-citrulline and nitric oxide catalyzed by nitric oxide synthase, and nitric oxide has the effect of dilating vascular smooth muscle. Can expand the umbilical cord and placental capillaries, thereby enhancing the ability to transport nutrients from the placenta blood to the fetus. 3 Vitamin Reproductive Nutrition Vitamin E (also known as tocopherol) is closely related to the reproductive function of animals and has the functions of promoting gonads, ovarian development, promoting conception, and preventing miscarriage. VE deficiency can cause reproductive dysfunction, estrus or delayed estrus, infertility, and miscarriage. , stillbirths and even loss of reproductive ability; vitamin c, participate in the body of the redox reaction, to maintain the integrity of the egg interstitial, so that the egg is robust; B a carrot has a significant impact on the reproductive organs, folic acid can improve reproductive performance of sows, Supplementation of folic acid during pregnancy is a critical period for improving reproductive performance of sows. The main effect of folic acid supplementation on sows is to increase litter size and improve embryo survival rate. Biotin can improve reproductive performance of sows and can improve The number of litters reduces the number of non-productive days of sows; riboflavin is an important part of many oxidoreductases and participates in energy and protein metabolism. Premature birth, embryonic death and fetal malformation are the causes of sow deficiency. 4 Trace Elements Reproductive Nutrition Zinc is an indispensable element in pig nutrition, and it is a component or activating factor of various enzymes as well as various hormones. It plays an important role in the growth and reproduction of pigs. Sows lose a lot of iron during pregnancy and lactation, especially high-producing sows often show iron deficiency anaemia, so iron is also very important for the reproductive performance of sows.
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