冬春大水面放养河蟹具有水活流畅,受风面大,溶氧充足,天然饵料丰富等资源优势,能显著降低生产成本,提高养殖效益。现结合我场多年养殖经验,将其技术要点介绍如下: 1 放养准备。选择水质清新、阳光充足、水草丰富、螺蚬较多的水域,水草不多的地方可采取人工种植或收集部分水草予以弥补,这样,河蟹可以获得充足的动植物饵料,有利于满足和促进河蟹的生长。同时采用网片和木桩将养殖水域双层圈围起来,高度以高出常年平均水位1m Spring and spring large water surface stocking crabs with smooth water and wind, by the wind surface, adequate dissolved oxygen, natural food rich in resources, can significantly reduce production costs and improve farming efficiency. Now my field of farming experience for many years, the technical points are as follows: 1 stocking preparation. Select fresh water, plenty of sunshine, abundant aquatic plants, snails more water, plants can be planted to take advantage of artificial planting or collecting some of the water to make up, so that crabs can get sufficient animal and plant feed, is conducive to meet and promote the crab Growth. At the same time mesh and stakes will be doubled around the breeding waters encircling the height above the average annual water level 1m