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《Journal of Zhejiang Ocean University(Natural Science)》 2011-03
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Relationship Between Chlorophyll a Content and TN and TP Concentrations in Water Bodies of South Taihu Lake

WANG Jun,WEI Xiao-hang,YAO Wei-zhong,et al(Zhejiang Institute of Freshwater Fisheries,Huzhou 313001,China)  
The relationships between the chlorophyll a(Chl-a) content and total nitrogen(TN),total phosphorus(TP) concentrations and The ratio of TN vs TP(N/P) in water bodies of south Taihu lake were investigated in the south of Taihu lake.Seasonal variations in the relationship between the Chl-a content and TN was observed in the statistic.The Chl-a content increased with increasing TN concentration when they in June 2007 and April 2008,and had no significant correlation in October 2007 and January 2008.The Chl-a content had no significant correlation with TP in all season.Ridge regression analysis showed that the Chl-a content increased with increasing TN concentration,TP concentration and N/P,when the favorable water body′s ratio of nitrogen vs phosphorus for algae growth in south Taihu lake(between 10 and 25),the relationship as follows:(Chl-a)=-0.001 2+0.006 4×(TN)+0.021 5×(TP)+0.000 5×(N/P)(R=0.543,P0.023).As a whole,there had the favorable water body′s TN and TP concentrations for algae growth in south Taihu lake,and observed Seasonalvariations in the relationship between the biomass of algae and nutrient by envionment factors such as temperature,light,hydrological and monsoon.
【Fund】: 湖州市重大科技专项(2007ZDN01)
【CateGory Index】: X524
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