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nature : feed the most commonly used, the most important of the additive, including amino acids, vitamins and minerals. Depending on different animal, different goals and different production physiological state of nutritional requirements and basic rations of various nutrients, the differences between principle done up for what we lack, the number of missing 27 votes, but the economy must be cost-effective, with the ultimate aim to give full play to livestock production, improve yield, save feed costs and lower demand. (1) amino acids, such as methionine, lysine and tryptophan, threonine, glutamic acid, glycine. (2) vitamins, such as vitamin A, vitamin B1, B2 vitamins, vitamin C, vitamin D (including D2, D3), vitamin E (including α-birth-, β - birth-and γ-birth-), vitamin K (including K1, K2, K3) vitamin B12 so. (3) minerals, calcium, phosphorus, chlorine, potassium, sulfur and magnesium constant elements, iron, copper, iodine, zinc, manganese, molybdenum, cobalt and Selenium.
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