| 苏北盐沼环境梯度上甲苯通量变化特征研究 |
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| 引用本文： | 王进欣. 苏北盐沼环境梯度上甲苯通量变化特征研究[J]. 北京林业大学学报, 2010, 32(1): 118-123 |
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| 作者姓名： | 王进欣 |
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| 作者单位： | 1 徐州师范大学城市与环境学院2 中国科学院地理科学与资源研究所 |
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| 基金项目： | 国家自然科学基金项目(90211008);;江苏省高校自然科学研究计划一般项目(06KJB170112);;“十一五”国家科技支撑计划项目(2006BAD03A1903);;徐州师范大学基金理科培育项目(07PYL07);;中国博士后科学基金项目(200801109、20070410135);;博士回校科研启动基金的资助 |
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| 摘 要： | 2004年4月至2005年1月在苏北盐沼沿环境梯度采用静态箱技术原位测定了甲苯气体通量。为确定高等植物对通量的贡献,进行了高等植物地上部分去除实验。结果表明:环境梯度上,在生长季(4—10月)盐沼整体上表现为甲苯的净汇,消耗率变化范围为2.50～17.45μmol/(m2.d),其中,互花米草带消耗率最高。在非生长季(11月至次年3月)表层冻结的植被带表现为甲苯的弱源,通量变化范围为5.15～10.76μmol/(m2.d)。光滩全年均表现为排放甲苯。由于盐沼消耗率大于排放率,生长季长于非生长季,所以海岸带盐沼全年表现为消耗甲苯。高等植物地上部分是甲苯的重要汇,但是消耗机制还不清楚。盐沼甲苯净消耗率与土壤温度、光照强度、土壤可溶性盐含量、土壤有机质、硫酸盐含量和大气中甲苯浓度呈正相关关系。
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| 关 键 词： | 甲苯 通量 土壤吸收 季节变化 海岸带盐沼 |
| 收稿时间： | 1900-01-01 |
Characteristics of toluene flux along environmental gradient of coastal salt marsh in northern Jiangsu Province |
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| WANG Jin-xin. Characteristics of toluene flux along environmental gradient of coastal salt marsh in northern Jiangsu Province[J]. Journal of Beijing Forestry University, 2010, 32(1): 118-123 |
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| Authors: | WANG Jin-xin |
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| Affiliation: | 1 College of Urban and Environment, Xuzhou Normal University, Jiangsu Province, 221116, P. R. China; 2 Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, P. R. China. |
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| Abstract: | The fluxes of toluene were seasonally measured using static flux chambers from April 2004 to January 2005,along environmental gradient of a coastal salt marsh in the north of Jiangsu Province. To estimate the contribution of higher plants to the toluene flux,aboveground biomass of plant were experimentally removed and the flux differences between the treatment and the intact were examined. The results showed that the vegetated salt marsh generally acted as a net sink of toluene during the growing season(fro... |
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| Keywords: | toluene fluxes soil uptake seasonal variation coastal salt marsh |
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