青海省冷水资源丰富，已成为全国最大的鲑鳟鱼产地之一。其中虹鳟产量最大、肉品红嫩而被誉为高原三文鱼。目前，养殖所用饲料基本来自国外，由此带来的养殖成本高、与青藏高原养殖条件下的营养需要不能完全匹配等问题。为了我国鲑鳟鱼高原冷水养殖产业的可持续发展，亟需解决饲料国产化的难题。蛋白质是鱼类最重要的营养素，饲料蛋白质直接影响鱼类生长和品质。然而与国外相比，国内对虹鳟营养和饲料方面的研究开展较晚较少，尤其对青藏高原养殖条件下虹鳟蛋白质营养的研究仍处空白。此外，国内外缺乏蛋白质与虹鳟品质关系的系统定量研究。本研究系统研究在青藏高原高海拔、低溶氧、贫营养水等独特条件下，饲料蛋白质水平和来源对虹鳟生长和品质的影响。从生长性能和品质属性相关指标分析得出适应高原环境的虹鳟最适饲料蛋白质水平和鱼粉替代配方，分析在青藏高原独特条件下，虹鳟对饲料蛋白质的需要情况为研发高效高品质环保鲑鳟鱼饲料提供理论依据和基础数据。

Qinghai province possesses the abundant cold-water resource, and has been the largest trout aquaculture base in China. Especially, rainbow trout is praised as “Qinghai-Tibet plateau salmon” for its largest yield and red and tender fillet quality. At present, foreign commercial feeds are introduced wildly in feeding process of this fish. Consequently, some problems resulting from using the foreign commercial feeds including the higher feeding cost, nutrients in the commercial feeds not completely meeting the demands for growth in Qinghai-Tibet plateau, etc. have become the great challenge. Feed nationalization is an urgent need to resolve for the sustainable development of this industry. Dietary protein is usually the most important nutritional factor affecting fish growth and fish quality. Compared with studies abroad, there are few studies about nutrition and feeds of rainbow trout in China. Especially to our knowledge, no study was done in Qinghai-Tibet about rainbow trout nutrition. In addition, there are few studies to systematically and quantitatively assay the effect of protein on fish quality of rainbow trout. Hence, in this project, rainbow trout (Oncorhynchus mykiss) will be used as subject to study the effect of dietary protein levels and sources (fish meal replacement) on the growth and fish quality, which will be based on the quality indicators evaluated from human vision, smell, taste, touch and nutrition. On the basis of growth and fish quality performances, the project is expected to obtain the optimum dietary protein level and fish meal substitutable formula of rainbow trout fitting to unique environment of Qinghai-Tibet plateau, and provide the theory and data supports for high-efficiency, high-quality and environmental friendly aquafeed of trout.