Nutritional efficacy of monomer nitro acids

　　The monomer amino acids often added in aquatic feed are lysine and methionine, because energy feed and plant protein feed are two bulk raw materials in aquatic feed, lysine is the most lacking in energy feed, and methionine is the most lacking in plant protein feed.

　　1. Nutritional efficacy of lysine:

　　Lysine plays a very important role in maintaining the normal growth and development of aquatic animals and the normal function of nervous system. The lack of lysine in the feed will cause negative nitrogen effect (protein decomposition and excretion), so that the protein in the feed can not be fully utilized, the growth of aquatic animals is slow, and there will be symptoms such as fatty liver and reduction of bone calcification rate.

　　2. Nutritional efficacy of methionine:

　　Methionine is an amino acid containing ****** sulfur in essential amino acids. It participates in the transfer of methyl in aquatic animals, the synthesis of adrenaline, choline and inositol, and the metabolism of phospholipids in the liver. Methionine can synthesize lysine, which has the function of protecting liver and detoxifying. Therefore, methionine can promote the growth of aquatic animals and prevent fatty liver, flower liver and other diseases.