根据生态循环种养互补立体开发原则，利用时间差，采取池塘河蟹高产养殖与油菜轮作技术，比单养殖河蟹每667平方米效益增加20／以上，其主要技术要点是：一、池塘条件池塘应选择靠近水源，水质无污染的区域，面积以6670～20OIO平方米为宜，水深1～1．5米，四周代水区占池塘面积 According to the principles of eco-cycle and mutual support of complementary development of three-dimensional development, the use of time difference, ponds and crabs to take advantage of high-yield culture and oilseed rape rotation technology, single breeding crab per 667 square meters benefit increased by more than 20 /, the main technical points are: Close to the water, water pollution-free areas, an area of ​​6670 ~ 20OIO square meters is appropriate, the water depth of 1 to 1.5 meters, four weeks on behalf of the water area of ​​the pond area