引言蛋白质是动物进行各种活动和构成动物体的最主要的物资基础。动物的生长虽然包括体蛋白质的增加和脂肪的积累两个方面,但主要的还是体蛋白质的增加。显然。蛋白质是决定动物生长快慢的最关键的因素。同时它又是饲料成本中费用最大的部分。如果要取得最佳的养殖效益,必须研究满足其快速生长的最适蛋白质含量。目前,美国、日本、苏联等国已有许多的鱼类营养学家以某些鱼类、贝类、虾类等为研究对象,探讨了其蛋白质的最适需要量范围,以及其对各种必需氨基酸的需要量。我国从七十年代开始也对草鱼、 Introduction Proteins are the most important material basis for animals to perform various activities and form animal bodies. Although the growth of animals, including the increase of body protein and fat accumulation in two aspects, but the main thing is the increase of body protein. Obviously. Protein is the most critical factor that determines the speed of animal growth. It is also the most costly part of feed costs. If you want to get the best breeding benefits, you must study the optimal protein content to meet its rapid growth. At present, many fish nutritionists in the United States, Japan, the Soviet Union and other countries have already studied some fish, shellfish, shrimp, etc., and explored the optimal range of their protein requirements, Essential amino acid requirements. Since the seventies of our country also grass carp,