In the production practice, how to use the good vitamin is more headache. General nutrition additive is determined according to feeding standard. The vitamin requirements listed in the feeding standard should be the minimum requirement, which is the amount obtained from the feed in the neutral temperature zone of the breeding animals. But in production, due to environmental conditions, feed processing, feed storage time, feed composition, production level and health breeding change is bigger, so according to the production experience, the adding amount of feed is higher than recommended in the breed standard requirements.
The recommended amount of vitamin in daily diet is generally greater than the requirement in feeding standard. The recommended amount by the company that produces vitamin products is more than the recommended amount of scientific workers or variety companies, and is generally recommended by scientific workers or variety companies. Feed according to the amount of adding vitamin vitamin manufacturers recommend possible for animals health and stored in the body has a certain advantage, but not necessarily achieve ideal result on economic benefits, the reasonable adding vitamin will greatly promote the healthy growth of animals, producers get good economic benefit. According to a large number of test results and production feeding effect, the minimum vitamin content in each kilogram of feed is recommended to consider the following factors:

1. General plant-based diet does not contain vitamin A and vitamin D, even after cyst technology of vitamin A and vitamin D also easy deactivation, so the recommended amount of vitamin A and vitamin D than requirements have thrown several times to ten times. The recommended amount of vitamin K and vitamin E is 3 ~ 5 times higher than that of the feeding standard.
2. The amount of vitamin B2 and vitamin B5 should be higher than the requirement of feeding standard, which is 1.5 times ~ 2 times.
3. Rich in vitamin B1 and vitamin B6 in common feed, to reduce the cost, the amount of food should be lower than the standard of feeding. There are more choline in animal feed and soybean cake feed, so the dosage should be lower than the standard requirement. At the same time, choline chloride is alkalescent. When combined with other vitamin additives, the potency of other vitamins is not mixed, and should be added separately.
4. The content of biotin in feed is rich, which can be lower than the requirement; The price of biotin is high, and there is no good economic benefit when adding a certain amount, so many commercial vitamins do not contain biotin.
5. Other vitamin folic acid, vitamin B12 and pantothenic acid can be added as required, and the content of the feed is treated as a safe amount.
The amount of vitamin additive added is generally 200 grams ~ 300 grams per ton of feed.