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引用本文:宋玉芝,秦伯强,杨龙元,胡维平,罗潋葱.太湖北部典型乔木冠层对酸性降雨的中和作用.湖泊科学,2005,17(2):157-161. DOI:10.18307/2005.0211
SONG Yuzhi,QIN Boqiang,YANG Longyuan,HU Weiping,LUO Liancong.Role of Typical Arbor Layer in Neutralizing Acid Rain in Northern Taihu District. J. Lake Sci.2005,17(2):157-161. DOI:10.18307/2005.0211
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太湖北部典型乔木冠层对酸性降雨的中和作用
宋玉芝1,2,3, 秦伯强1, 杨龙元1, 胡维平1, 罗潋葱1,2
1.中国科学院南京地理与湖泊研究所, 南京210008;2.中国科学院研究生院, 北京100039;3..南京信息工程大学环境科学与工程系, 南京210044
摘要:
2003年6-7月梅雨期间,于太湖北部测定大气降雨、典型林冠穿透雨和地表径流水等样品的pH和N、P等营养元素化合物离子浓度,结果表明,林冠层穿透水pH平均值比大气自然降水高约1.2个pH单位,其中和酸性物质效率为82%-97%,中和能力显示出阔叶树大于阔、针叶混交树,阔、针叶混交树大于针叶树的规律,并计算比较了乔木冠层和草坪、村镇地表径流水相对于自然降水中的TN、TP比值.从而得出,树木冠层穿透水中的离子浓度的变化是对酸沉降的一种积极的响应.
关键词:  酸沉降  林冠穿透水  太湖
DOI:10.18307/2005.0211
分类号:
基金项目:国家自然科学基金委员会与香港资助局合作课题“大气氮磷输入对湖泊水质的影响研究"(N-HKUST612/01,40131160734)共同资助.
Role of Typical Arbor Layer in Neutralizing Acid Rain in Northern Taihu District
SONG Yuzhi1,2,3, QIN Boqiang1, YANG Longyuan1, HU Weiping1, LUO Liancong1,2
1.Nanjing Institute of Geography & Limnology, Chinese Academy of Science, Nanjing 210008, P. R. China.;2.Graduate School of Chinese Academy of Sciences, Beijing 100039, P. R. China;3.Dept. of Environment & Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, P. R. China
Abstract:
During the pluin rain period of June-July in 2003,the pH values and concentrations of N,P elements of samples of rainfall,throughfall and runoff in north Taihu Lake were measured.The results showed that the averge pH value of throughfall was 1.2 pH.unit higher than that of rainfall.The effciency of neutralization acidic matter was 82%-97%,The order of abilities of neantral-izatain for acidic rain of different canopy were as following:broadleaf > mix of broadleaf and conifer > conifer.At the same time,the ratios of TN,TP of waters from arbor, lawn, village and small lown to those of rainfall were also calculated.Variations of iron concentrations of rainfall through arbor layer were an active response to acid depostion,i.e.decreasing the degree of acid rain.
Key words:  Acid deposition  throughfall  Lake Taihu
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