池塘河蟹高产养殖与油菜轮作技术 根据生态循环立体开发、种养互补的原则,利用时间差,采取池塘河蟹高产养殖与油菜轮作技术,比只养殖河蟹亩效益增加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。要求一个池塘面积以10～30亩为宜,水深1～1.5 Pond crab high-yield culture and oilseed rape rotation technology According to the ecological cycle of three-dimensional development, the principle of complementarity, the use of time difference, take pond crab high-yield culture and oilseed rape rotation technology, than only farming crab acres of benefits increased by 20%, the main technical points are: First, the pond conditions Pond should choose near the water, water pollution-free areas. Requires a pond area of ​​10 to 30 acres is appropriate, the water depth of 1 to 1.5