At present, the animal husbandry industry widely uses broad-spectrum antibiotics as growth promoters, which will reduce the number of bacteria in the intestinal tract of livestock and poultry, leading to a reduction in the synthesis of various vitamins. Due to the advancement of breeding technology, the production performance of various breeds of livestock and poultry has been continuously improved, the metabolic rate of various substances in the body has been continuously accelerated, and the demand for various vitamins has continued to increase.
　　 Because modern animal husbandry is driven by commercial factors, in order to obtain the best economic benefits, there are various stress factors in the living environment of various animals, such as crowding, environmental temperature and humidity, air quality, etc. When animals are under stress, the metabolism of various substances in their bodies accelerates and their requirements for various vitamins increase. If sufficient vitamins are not provided, the animal will be in a subclinical disease state, which affects growth and development, and will develop disease in severe cases. Compared with the above losses, the investment in adding sufficient vitamins is very small, which is in line with the principles of modern business practices.
　　 When an animal is in a special physiological stage, the need for vitamins is higher than usual, such as childbirth, disease, etc.
　　 High temperature in summer and other factors lead to a decrease in feed intake, while higher vitamins are required at high temperatures, and the amount of vitamins in feed is required to double.
　　 Due to the different quality of various individual vitamins used in general feed mills, there will be certain losses, such as expiration, static electricity, storage conditions, mixing uniformity, carrier quality, etc. At present, one of the biggest factors leading to the loss of animal husbandry is the low uniformity in the feeding process, which affects the uniformity. In addition to management factors, whether the various micronutrients in the feed are evenly mixed is a big factor, the most important of which is The important thing is vitamins. Because animals need vitamins at all times during the metabolic process, water-soluble vitamins do not accumulate in the body. However, the testing methods and standards for various water-soluble vitamins in my country have not yet been unified.
　　 Due to the different quality of various raw materials used in feed, such as high content of urease in soybean meal, which affects the absorption of other nutritional factors, it is necessary to multiply the added amount of vitamins by a certain safety factor.
Taking into account the above factors, after calculation, the cost increase brought by more vitamins and the increase in benefits brought by the normal growth and development of animals are compared, and the best benefit/cost ratio is found. The use of high vitamin content feed will make each feeding The feed conversion rate in the field was further improved.

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