利用河道养殖河蟹,不需另投饵料,只要加强平时的看护,一般投入产出比可达1:8,效益十分显著。现将其养殖技术要点介绍如下:一、河道选择选择水质好、上游无污染,河面开阔,水深1.8米左右,水位落差不大,水流通畅,pH值为6.5～8.5,且水草、螺蛳等水生植物和天然饵料资源丰富的河道养 The use of river culture crabs, without the other cast bait, as long as strengthening the usual care, the general input-output ratio up to 1: 8, the effect is very significant. Now the breeding technology points are as follows: First, the choice of river water quality is good, the upper reaches of non-polluting, open river, the water depth of about 1.8 meters, the water level gap is not big, smooth flow, pH 6.5 to 8.5, and aquatic plants, snails and other aquatic Plant and natural bait resource-rich river culture