娣℃按绘姹濉姘磋川璇浠锋浣绯荤绌

Liu Manhong, Northeast Forestry University, Harbin , College of Wildlife Resources; Yu Hongxian, Northeast Forestry University, Harbin , College of Wildlife Resources; Liu Qigen, Shanghai Ocean University, Shanghai

Water quality evaluation index system of freshwater aquaculture pond | 娣℃按绘姹濉姘磋川璇浠锋浣绯荤绌

2011

Liu Manhong, Northeast Forestry University, Harbin (China), College of Wildlife Resources | Yu Hongxian, Northeast Forestry University, Harbin (China), College of Wildlife Resources | Liu Qigen, Shanghai Ocean University, Shanghai (China)

[Objective] The aim was to establish the water quality evaluation index system of freshwater aquaculture pond. [Method] The expert survey, DELPHI, field research and other methods were used. Based on the analysis of factors influencing water quality of freshwater aquaculture pond, and the importance degree of 14 factors influencing water quality of freshwater aquaculture pond was ordered. Then, five factors were selected as index to establish the water quality evaluation index system of freshwater aquaculture with the determination of thresholds of these factors. [Result] The importance degree of water quality of freshwater aquaculture pond showed an order of Dissolved oxygen pH Phytoplankton quantity Transparency Total Nitrogen Zooplankton quantity Water temperature Biochemical Oxygen Demand Water color Salinity Total hardness; according to the value of importance degree, the dissolved oxygen, pH, transparency, phytoplankton quantity and total nitrogen these five factors were selected as the index system of water quality evaluation of pond. The level of water quality of freshwater aquaculture pond was divided into five, and the tolerance range of fish to each index was obtained by expert observation. [Conclusion] This study had provided a scientific basis for water quality evaluation system of freshwater aquaculture pond.

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