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河蟹的增大、增重、断肢再生都是在脱壳后实现的。从幼蟹长成成蟹大约历经15次脱壳,每次脱壳(最初1小时左右完全丧失抵制敌害和不良环境的能力)都是河蟹生存的难关。要使河蟹安全度过脱壳期,人工养殖管理必须抓住以下三点: 一、适时调整饵料组成每次脱壳来临前一周,应将人工饲料中动物性饵料比例提高到50%左右,在人工配合饲料中添加2%的磷酸二氢钙和0.1%的脱壳素,以满
Increased crab, weight gain, limb amputation regeneration are achieved after shelling. Crabs grow from crabs to crabs about 15 times after shelling, each shelling (the first 1 hour or so to completely eliminate the predators and adverse environmental ability) are crab survival difficulties. To ensure the safety of crabs shelling period, artificial aquaculture management must seize the following three points: First, the timely adjustment of the composition of bait Each shelled before the advent of the week should be artificial feed animal feed ratio increased to 50%, at Artificial feed to add 2% of calcium dihydrogen phosphate and 0.1% chitin to full