研究了池塘养殖河蟹的放养密度与单位面积产量和育成规格及其经济效益的关系。研究结果表明 ,在一定范围内增加幼蟹的放养密度能有效地提高单位面积的产量。但在增加放养密度提高单产的同时 ,对提高河蟹育成规格不利 ,从而影响提高池塘的经济效益。池塘养蟹的成活率应稳定在 70 %左右 ,放养密度为 10 0 0 0～ 12 0 0 0只 /hm2 ,幼蟹规格为 10 0～ 140只 /kg为宜 The relationship between the stocking densities of pond culture crabs and their yield per unit area, their breeding standard and their economic benefits were studied. The results show that increasing the stocking density of crabs in a certain range can effectively increase the yield per unit area. However, increasing the stocking density to increase yields at the same time, to improve the crab breeding specifications unfavorable, thus affecting the economic efficiency of the pond. Survival rate of pond crab should be stable at about 70%, stocking density of 10 000 ~ 1200 / hm2, crab size of 10 0 ~ 140 / kg is appropriate