Vitamin Feeds

natural vegetable and animal feeds with high vitamin content. By introducing vitamin feeds into animal rations, the vitamin requirements of the animals can be satisfied without special additives. Plants containing carotene constitute the chief source of vitamin A: green grass, especially leguminous grass (30-100 mg/kg), good hay (20-30 mg/kg), grass meal (100-250 mg/kg), carrots (70-95 mg/kg), and fish oil. The main sources of the D group vitamins are sun-dried leguminous hay (750-900 international units [IU] per kg), colostrum (100-200 IU), fish oil (50,000 IU), and nutrient yeast irradiated by ultraviolet light (3,000-20,000 IU). Vitamin C is primarily found in young green plants, especially in leaves (400-900 IU) and pine needles (1,000 IU), and in root and tuber crops (115-380 IU). Grass (100-150 mg/kg), leguminous hay (70 mg/kg), and wheat bran are good sources of vitamin E. The B group vitamins are contained in many vegetable and animal feeds (see Table 1). Vitamin B12 is found mainly in animal feeds—fish meal (30-80 mg/kg) and meat-and-bone meal (40 mg/kg). Vitaminized mixed feeds are manufactured for different types of farm animals.