放养是否合理成为河蟹养殖经济效益高低的关键因素。合理的放养应包括品种搭配得当,苗种质量优异,规格适中、密度适宜等方面。笔者仅从以上方面谈一些粗浅的看法,供参考。一、品种搭配得当任何水域如果单独养蟹,产量一般较低,为提高单位面积的产量和产值,应因地制宜推行合理混 The stocking is reasonable to become a key factor in the economic efficiency of crab farming. Reasonable stocking should include the proper mix of varieties, excellent seed quality, medium size, suitable density and so on. I only talk about some superficial view from above, for reference. First, the species is properly matched If any water crabs alone, the production is generally low, in order to improve the yield per unit area and output value, should be appropriate to promote the implementation of local conditions