Vitamin E is closely related to the reproductive performance of chickens. Vitamin E regulates gonadotropin by regulating the secretion of gonadotropins in the anterior pituitary. When the cock lacks vitamin E, the testis 9 becomes atrophy, sperm movement is abnormal, and sperm cannot even be produced; the ovary function of the hen is decreased. The vitamin E contained in the egg is necessary for the normal development of the embryo. The breeder chicken can transfer vitamin E to the chicks through the fertilized eggs. The vitamin E needed for the yolk sac-stage chicks (1 to 5 days old) is mainly provided by the yolk sac. Henning pointed out that the amount of vitamin E added to the breeder's diet is highly correlated with the hatching rate of the breeder's eggs. When the amount of selenium in the diet is sufficient, the amount of vitamin E can be reduced, and in the absence of excessive unsaturated fatty acids, there is 1 per kg of diet. The milligram of vitamin E can meet the egg production requirements of chickens. When the dietary vitamin E dosage reaches 20 IU/kg, a high hatching rate of the breeding eggs can be guaranteed.
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