氨基酸是一切生命的基础，它是由二十余种氨基酸组成的。在这些氨基酸中又分为必须氨基酸和非必须氨基酸，对于蛋鸡而言，蛋氨酸是第一必须氨基酸，缺少它，就会影响畜禽生产力．因此，蛋氨酸对提高畜禽的生产性能有着非常重要的作用，饲料企业为提高产品质量大多添加蛋氨酸， Amino acids are the basis of all life, it is composed of more than 20 kinds of amino acids. In these amino acids are divided into essential amino acids and non-essential amino acids, for laying hens, methionine is the first essential amino acids, the lack of it, it will affect the productivity of livestock and poultry. Therefore, methionine to improve the performance of livestock and poultry production has a very important role, feed companies to increase product quality mostly to add methionine,