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高密度水产养殖需要蛋白质含量高的饲料以满足水生生物的营养需求。以斑点叉尾(鱼回)(Channel catfish)为例,自然水域每公顷约可收获250公斤。若采用高密度方式养殖,每公顷收获量可提高到2,000～5,000公斤。美国商品水产饲料一般含25%至40%的粗蛋白质,通常以鱼粉、屠宰厂副产品、棉籽粉作饲料中蛋白质原料的主要成分。综合成本、来源和营养价值各方面的条件考虑,黄豆粉在未来的水产饲料上无疑将占重要的地位。经去皮、脱脂后的黄豆粉约含49%的粗蛋白质,其中85%能被斑点叉尾(鱼回)、虹鳟、
High-density aquaculture requires high-protein feed to meet the nutritional needs of aquatic organisms. In the case of Channel catfish, natural waters yield about 250 kg per hectare. With high-density farming, the yield per hectare can be increased to 2,000 to 5,000 kg. US commercial aquafeeds typically contain between 25% and 40% crude protein, most commonly as a major ingredient in protein feedstock for fishmeal, slaughterhouse by-products, and cotton seed meal. Integrated cost, source and nutritional value of all aspects of conditions, soybean flour in the future of aquaculture will undoubtedly occupy an important position. The peeled and defatted soy flour contains about 49% of the crude protein, of which 85% can be spotted (fish back), rainbow trout,