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《Journal of Anhui Agricultural Sciences》 2007-23
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Distribution Characters of Nutrient in Jialing River and its Impact on the Three Gorges Reservoir

LI Song et al(Chongqing Academy of Environmental Science,Chongqing 400020)  
Nutrient contents in water of Jialing River were investigated.Result showed that the concentration of total nitrogen ranged from 1.11 to 4.18 mg/L with mean concentration of 2.16 mg/L.Total phosphorus ranged from 0.03 to 0.67 mg/L with mean concentration of 0.14mg/L.Contents of the main forms of nitrogen and phosphorus varied seasonally.The main form of inorganic nitrogen in Jialing River was NO3-N,which occupying 80 %~90 % of the total inorganic N.Three forms of inorganic N was in stable thermodynamic equilibrium.There was significant positive correlation between water discharge and total nitrogen fluxes,total phosphorus fluxes.Their correlation coefficient were R2=0.997 6**(n=12)and R2=0.996 3**(n=12),respectively,which indicating that N and P in water mainly came from non-point source pollution.Total nitrogen and total phosphorus load would be 381156 and 52369 tons per year,which were 33.2 and 27.9 times of the 67 main sewage limbers in the Three Gorges areas.
【Fund】: 重庆市自然科学基金资助项目(2005BB7239);; 重庆市建委资助项目(2006-12)
【CateGory Index】: X52
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