人工饲养河蟹,由于限制其活动范围,缩小觅食区域,减少食物种类,必然会影响河蟹的生长。尤其在高密度饲养条件下,人工饲喂的饵料对它生长的影响更大。这就要求饲养者研究河蟹的营养需要,供给全价饵料,以期获得最佳的经济效益。一、饲料的营养成分及其功能河蟹从蚤状幼体开始摄食水中微生物作为饲料,一直到成蟹摄食各种饲料,依靠饲料来维持生命,形成产品。河蟹摄食各类饲料中的营养成分大致如下: Artificially raised crabs, due to limit their scope of activities, reduce foraging areas, reduce food types, will inevitably affect the growth of crabs. Especially under high-density feeding conditions, artificially fed bait has a greater impact on its growth. This requires breeders to study the nutritional needs of crabs, feeding the full price of food, with a view to obtain the best value for money. First, the nutritional content of feed and its function Crab from the flea-like larvae began to feed water microbes as feed until the feeding of crabs of various feeds, relying on feed to maintain their lives, the formation of products. Crab feed all kinds of nutrients in the diet is as follows: