| 贵州典型森林群落植被冠层的酸雨淋溶特征及缓冲作用 |
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| 引用本文： | 宋文龙,杨胜天,温志群,蔡明勇,白晓辉,高芳.贵州典型森林群落植被冠层的酸雨淋溶特征及缓冲作用[J].环境科学学报,2010,30(1):15-23. |
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| 作者姓名： | 宋文龙 杨胜天 温志群 蔡明勇 白晓辉 高芳 |
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| 作者单位： | 1. 北京师范大学地理学与遥感科学学院,遥感科学国家重点实验室,环境遥感与数字城市北京市重点实验室,北京100875
2. 北京师范大学环境学院,北京,100875 |
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| 基金项目： | 国家重点基础研究发展计划(973)项目(No.2005CB422207);;国家自然科学基金项目(No.40671123)~~ |
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| 摘 要： | 在贵州龙里地区开展酸雨模拟实验,并进行天然降雨连续监测,采集马尾松、灌丛冠层穿透雨,结果表明:①研究区降雨中主要阳离子浓度依次为NH4+Ca2+K+Na+Mg2+,降雨pH值大于6.0时,降雨中NH4+含量降低,Ca2+占优势;降雨中主要阴离子浓度依次为SO42-NO3-Cl-;冠层穿透雨与降雨相比,Na+、K+、Ca2+、Mg2+、Cl-、NO3-、SO42-和有机酸富集,特别是K+、Ca2+、SO42-和有机酸富集倍数最大.②森林冠层对酸雨的缓冲作用体现在酸雨中H+与树叶组织中的盐基阳离子发生交换反应,淋出K+、Mg2+、Ca2+等阳离子,减少了酸雨中H+含量.Na+相对惰性,在降雨和穿透雨中的含量变化不大;K+、Mg2+、Ca2+的淋出是冠层缓冲降雨酸度的主要原因,其中K+和Ca2+作用最突出,其次是Mg2+.③贵州典型森林群落植被冠层的缓冲作用随降雨pH值而变化.对pH值接近3.0的强酸性降雨,经过冠层形成的穿透雨pH值大于降雨,典型森林群落植被冠层对酸雨的缓冲作用依次为马尾松林针阔混交林灌丛;对4.0pH6.0的降雨,马尾松林冠层使降雨更加酸化,典型森林群落植被冠层对酸雨的缓冲作用依次为针阔混交林灌丛马尾松林;对pH值大于6.0的非酸性降雨,经过冠层后被酸化,穿透雨pH值小于降雨;穿透雨pH值基本在4.0～6.0范围内.
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| 关 键 词： | 贵州 酸雨 穿透雨 淋溶 缓冲 |
| 收稿时间： | 6/5/2009 3:55:54 PM |
| 修稿时间： | 2009/9/30 0:00:00 |
Canopy buffering and leaching of a typical forest community under acid rain in Guizhou Province |
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| SONG Wenlong,YANG Shengtian,WEN Zhiqun,CAI Mingyong,BAI Xiaohui and GAO Fang.Canopy buffering and leaching of a typical forest community under acid rain in Guizhou Province[J].Acta Scientiae Circumstantiae,2010,30(1):15-23. |
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| Authors: | SONG Wenlong YANG Shengtian WEN Zhiqun CAI Mingyong BAI Xiaohui and GAO Fang |
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| Institution: | SONG Wenlong1,YANG Shengtian1,WEN Zhiqun1,CAI Mingyong1,BAI Xiaohui1,GAO Fang21. School of Geography,Beijing Normal University,State Key Laboratory of Remote Sensing Science,Beijing Key Laboratory for Remote Sensing of Environment , Digital Cities,Beijing 1008752. College of Environment,Beijing 100875 |
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| Abstract: | Based on the simulation experiments of acid rain and continuous monitoring of precipitation and throughfall in the forest canopy layer of coniferous forest and shrubs at Longli in Guizhou province,the results show that: firstly,the concentrations of cations in precipitation in the study area decrease in the order of NH+4,Ca2+,Na+,K+ and Mg2+,and Ca2+ becomes dominant over NH+4 when the pH of the rain is above 6.0. Of the measured anions,sulfate is the dominant,NO-3 the next and chloride is the least. In the... |
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| Keywords: | Guizhou acid rain throughfall leaching buffering |
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