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1998～ 1 999年 ,杭州地区推广实施了青虾池塘立体养殖技术 ,推广面积达 1 71 .5hm2 ,平均产量 1 94.4kg/1 0 0 0 m2 ,商品虾规格约 40 0尾 /kg,平均净收益 5 75 5 .0 4元 /1 0 0 0 m2 ,投入产出比 1∶ 2 .5 8,取得了显著的经济效益。现将青虾池塘立体养殖技术介绍如下 :一、根
From 1998 to 1999, the three-dimensional aquaculture technology of freshwater prawn pond was popularized and implemented in Hangzhou area with an area of 1 71.5hm 2, an average yield of 94.4kg / 100m 2 and a commercial shrimp size of about 40 0 / kg Income 5 75 5 .0 4 yuan / 1 0 0 0 m2, input-output ratio 1: 2 .5 8, achieved significant economic benefits. Now three-dimensional culture of freshwater prawn pond introduced as follows: First, the root