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位于江苏省灌云县县城西部3km处的叮当河是县城城区近20万居民的饮用水源,全长30km,水深3m～5m,更是县内重点水质保护河道。从2004年起,由县水产技术指导站牵头,在叮当河河道进行“河蟹无公害生态养殖和饮用水源的保护”课题试验,经过2年的实践,效果非常理想,养殖面积和规模也呈逐年递增的趋势,既保证了水质清新,又增加了经济收入,实现了经济效益和生态效益的双赢,具有一定的推广价值,现将主要技术归纳如下。一、保护水源与放养河蟹的生物(态)学依据城市饮用水源中适量放养河蟹符合环境友好、资源互
Jideng River, located 3km west of Guanyun County in Jiangsu Province, is the drinking water source for nearly 200,000 residents in the urban area of the county. The total length is 30km and the water depth is 3m to 5m. It is also the key water quality protection channel in the county. From 2004 onwards, the county Fisheries Technical Guidance Station led the trial of “Crab pollution-free ecological aquaculture and protection of drinking water sources” in the Dangdang River courses. After two years of practice, the effect was very satisfactory, and the area and scale of culture were also The trend of increasing year by year not only ensures the fresh water quality but also increases the economic income, realizes the win-win economic and ecological benefits and has certain promotion value. The main technologies are summarized as follows. First, the protection of water and stocking crab biology (state) based on the amount of urban drinking water stocking crabs in line with the environment-friendly, mutual resources