摘要
为了解酸雨对温州三土羊湿地水体氮营养盐数量的影响,本文测定了三土羊湿地水体中不同形态氮的含量,其中氨氮290～1075mg·L-1,平均538mg·L-1、硝态氮016～044mg·L-1,平均031mg·L-1;总氮3404～6320mg·L-1,平均5575mg·L-1和水体的pH值,61～65,平均64;并测算了近两年通过降水输入到三土羊湿地和三土羊湿地水体中不同形态氮的数量及其占湿地现有水体中各形态氮的比例,其中输入到三土羊湿地氨氮、硝态氮和总氮的量分别为248～286×104kg、287×104～496×104kg和535×104～782×104kg,分别占湿地水体现有量的56%～64%、1121～1938倍和12%～17%;直接输送到三土羊湿地水体各形态氮的数量072×104～084×104kg、083×104～144×104kg和155×104～227×104,分别占现有量的16%～19%,324～563倍和3%～5%.结果表明,酸雨是三土羊湿地水体氮污染的主要来源之一,对三土羊湿地水体富营养化产生重要影响.
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.
出处
《应用生态学报》
CAS
CSCD
北大核心
2005年第2期333-336,共4页
Chinese Journal of Applied Ecology
基金
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.
关键词
酸雨
湿地
水体污染
营养盐
Acid rain, Wetland, Water pollution, Nutrients.
