First, there are 13 essential amino acids that poultry must obtain from feed protein: lysine, methionine, tryptophan, arginine, histidine, leucine, isoleucine, phenylalanine, threonine Acid, valine, cystine, tyrosine and glycine.
Second, there are about 13 kinds of minerals necessary for poultry: Among them, the requirements for calcium, phosphorus, potassium, sodium and chlorine are relatively large. In addition, there are trace elements such as manganese, iron, copper, cobalt, zinc, magnesium, sulfur, and selenium.
Third, poultry must obtain 13 kinds of vitamins from feed: Among them, fat-soluble vitamins are A, D, E, and K. Water-soluble vitamins include thiamine, riboflavin (B2), hydrochloric acid, pyriol, pantothenic acid, There are 9 kinds of biotin, choline, folic acid and vitamin B12.
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