经我站的多年试验,精养鱼塘亩均净产500千克以上的同时,还可产蟹15～20千克。亩均水面总产值4000元,亩净利600元以上,比不养蟹的鱼塘净增利润150～200元,具体做法是: 一、鱼种放养模式根据河蟹喜水质较清的特点,减少上层鱼种放养数.增加草、鳊、鲫鱼种放养量,少放鲤鱼种。具体的是,尾重500克的花白鲢分别为50尾、150尾、尾重 After many years of testing station I, intensive fish ponds mu net production of more than 500 kg at the same time, but also produce 15 to 20 kg of crabs. Mu average water output of 4,000 yuan, net profit of more than 600 yuan more than the net profit of not raising crabs 150 to 200 yuan, the specific approach is: First, species stocking patterns according to the characteristics of crab hi water quality to reduce the upper Fish stocking number.Add grass, pomfret, carp species stocking, less carp species. Specifically, the tail weight of 500 grams of silver carp were 50, 150, tail weight