论文部分内容阅读
围网蟹鳜混养面积40 hm2,投放规格200只/kg的人繁长江蟹,放养密度1 500只/hm2,总计6万只;投放5~8cm翘嘴鳜鱼种,放养密度50尾/hm2,总计2 000尾;投放螺蛳2.5万kg,平均放养625 kg/hm2。共捕成蟹3 723 kg、鳜鱼809 kg、青虾1 000 kg、其它经济鱼类1 850 kg,总计重量7 382 kg;渔业总收入223 250元;生产总成本141 300元,总利润81 950元,单位面积利润2 049元/hm2,投入产出比为1∶1.58。
Crab 鳜 polyculture area of 40 hm2, put the size of 200 / kg of the Yangtze River crab, stocking density of 1 500 / hm2, a total of 60,000; put 5 ~ 8cm Cichlafish species, stocking density 50 / hm2, a total of 2 000; put Lo snails 25,000 kg, the average stocking 625 kg / hm2. A total of 3,723 kg of crabs were caught, 809 kg of mandarin fish, 1,000 kg of fresh shrimp and 1,850 kg of other economic fish, totaling 7,382 kg. Total fisheries income was 223,250 yuan, total production costs were 141,300 yuan, and total profit was 81 950 yuan, profit per unit area of 2,049 yuan / hm2, input-output ratio of 1: 1.58.