棉籽饼是棉籽榨油的残渣,其中粗蛋白的含量高达26—41％,是玉米、小麦的3—5倍,且鱼类必需的10种氨基酸齐全,另含多种维生素和无机盐。我国年产棉籽饼约300万吨、四川省达10万吨。但是以往对它缺乏应有的研究,迄今仍有95％的棉籽饼仅仅用作肥料,这是对良好蛋白源的大量浪费。七十年代以来,水产养殖业迅猛发展,鱼饲料的主要蛋白源——鱼粉发生世界性的短缺,且 Cottonseed cake is the residue of cottonseed oil, crude protein content of up to 26-41%, 3-5 times that of corn and wheat, and fish essential amino acids complete 10, and the other with a variety of vitamins and inorganic salts. China’s cottonseed cake with an annual output of about 3 million tons, Sichuan Province reached 100,000 tons. However, due to its lack of due research in the past, up to now, 95% of cottonseed cake is only used as fertilizer, which is a waste of good protein sources. Since the 1970s, aquaculture has been booming and there has been a worldwide shortage of fish meal, the main protein source for fish feed, and