title: [Effects of acid rain on nitrogen content in the water body of Wenzhou Sanyang wetland].
abstract: 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, NH4+-N was 2.90-10.75 mg x L(-1), average in 5.38 mg x L(-1); NO3(-)-N was 0.16-0.44 mg x L(-1), average in 0.31 mg x L(-1); and total was 34.04-63.20 mg x L(-1), average in 55.75 mg x 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 NH4+-N, NO3(-)-N and total N was 2.48 x 10(4)-2.86 x 10(4) kg, 2.87-4.96 x 10(4) kg and 5.35 x 10(4)-7.82 x 10(4) 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 x 10(4)-0.84 x 10(4) kg, 0.83 x 10(4)-1.44 x 10(4) kg and 1.55 x 10(4)-2.27 x 10(4), 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.
authors.affiliation: State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China. wetlandxfz@163.com
authors.forename: Xiufeng
authors.initials: X
authors.lastname: Zhang
authors.forename: Wenshan
authors.initials: W
authors.lastname: He
authors.forename: Jianjian
authors.initials: J
authors.lastname: Lu
mesh_terms: D015258:Acid Rain / Q000009:adverse effects*; D002681:China; D017753:Ecosystem; D009584:Nitrogen / Q000032:analysis*; D014876:Water Pollution
chemical_list: D015258:Acid Rain; D009584:Nitrogen