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《Chinese Journal of Applied Ecology》 2005-02
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Effects of acid rain on nitrogen content in the water body of Wenzhou Sanyang wetland.

ZHANG Xiufeng,HE Wenshan,LU Jianjian (State Key Laboratory of Estuarine and Coastal Research,East China Normal University,Shanghai 200062,China).  
In order to understand the effects of acid rain on the nitrogen (N) content in the water body of Wenzhou Sanyang wetland,this paper measured the concentrations of different N forms in the wetland,of which,NH+_4-N was 2.90~10.75 mg·L~-1 ,average in 5.38 mg·L~-1 ; NO-_3-N was 0.16~0.44 mg·L~-1 ,average in 0.31 mg·L~-1 ;and total was 34.04~63.20 mg·L~-1 ,average in 55.75 mg·L~-1 .The pH value was 6.1~6.5,average in 6.4.The measurement of the N input from precipitation in the past two years and its proportion to the existed N in the water body of the wetland showed that the input of NH+_4-N,NO-_3-N and total N was 2.48×104~2.86×104 kg,2.87~4.96×104 kg and 5.35×104~7.82×104 kg,and its proportion was 56~64%,11.21~19.38 times and 12%~17%,respectively.The N amount directly to the wetland water body was 0.72×104~0.84×104 kg,0.83×104~1.44×104 kg and 1.55×104~2.27×104,and its proportion was 16%~19%,3.24~5.63 times and 3%~5%.The results indicated that acid rain was one of the main sources of pollutant nitrogen which aggravated the water pollution of the Sanyang wetland.
【Fund】: 国家自然科学基金重点项目(40131020);; 国家重点基础研究发展规划项目(2002CB412406);; 上海市重点学科建设资助项目.
【CateGory Index】: X524
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