传统河蟹养殖技术要求河蟹苗种一次放足,规格整齐。但几年来生产实际过程中发现,在天然大水面采用分次投苗法能够取得较好的经济效益,现将试验情况总结如下:一、水面条件面积158亩,属圩区内自然河沟,与外界河沟相通,水体流动相对稳定,平均水深2.1米,深水处3.5米,浅水处1米,浅水 Traditional crab farming techniques require crab seed once full foot, neat specifications. However, during the past few years, the actual production process found that the natural large surface water can be divided into sub-investment seedling method to obtain good economic benefits. The experimental conditions are summarized as follows: First, the water surface area of ​​158 acres, is a natural river ditch within the area, and External river ditch interlinked, the water flow is relatively stable, the average depth of 2.1 meters, 3.5 meters deep water, shallow water at 1 meter shallow water