First, water-soluble vitamins

1, thiamine: Poultry on the synthesis of thiamine in the intestine can not be well used, it is generally necessary to feed supplements.

2. Riboflavin: The need for riboflavin in poultry feed decreases with increasing temperature, typically 2.5-8.0 mg/kg. The dose of riboflavin poisoning is tens to hundreds of times the amount required.

3. Niacin: The tryptophan in the diet can be converted to nicotinic acid. Poultry feed niacin requirements are generally lO-50mg/kg, toxic dose 350mg&g.

4. Vitamin B6: Protein levels in poultry diets increase, and tryptophan, methionine, or other amino acids increase the amount of vitamin B6.

5, pantothenic acid: dietary energy concentration increases, poultry's need for pantothenic acid increased; antibiotics, vitamin B12 can save the chicken's need for pantothenic acid.

6. Biotin: The requirement of biotin for poultry feed is generally 50-300 ug/kg. Biotin is safe for poultry within 4-10 times of the requirement.

7. Folic acid: Because of the limited folic acid synthesis in the intestine of poultry, it is difficult to use, so it needs to be supplemented. The fodder requirement for poultry feed is generally 0.2 to 1.0 mg/kg feed. Folic acid has no toxic effects.

8. Vitamin B12 Poultry is fed with vegetable feed or diets containing insufficient amounts of cobalt. There are gastrointestinal diseases and congenital defects that do not produce endogenous factors. Vitamin B12 is needed. Poultry diet vitamin B12 needs 3-10mg/kg, poisoning dose is at least hundreds of times the amount required.

9. Choline: The requirement for choline in poultry's diet is generally 500-200Omg/kg, and the chicken's tolerance is 2 times the requirement. Choline poisoning manifested itself as runny nose, trembling, cramps, and respiratory palsy.

10, vitamin c: high temperature, cold, transportation and other stress and stress conditions. When dietary energy, protein, vitamin E, selenium, and iron are insufficient, the need for vitamin c in poultry is greatly increased.

Second, the need for fat-soluble vitamins

Vitamin A: The minimum requirement for vitamin A in poultry diets is generally 1 000-5 000 IU/kg.

Vitamin D: The need for vitamin D in poultry is influenced by the diet.

Vitamin E: The requirement for vitamin E in poultry increases with the increase of unsaturated fatty acids, oxidants, carotenoids, and trace elements in the diet.

Vitamin K: Vitamin K is needed in all kinds of poultry diets, and the chicken needs vitamin K for coccidiosis.

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