| 紫玉兰树干液流对北京市综合环境变量的响应 |
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| 作者姓名： | Wang H Ouyang ZY Zheng H Ren YF Gao FY |
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| 作者单位： | 1. 中国科学院生态环境研究中心城市与区域生态国家重点实验室,北京,100085
2. 北京教学植物园,北京,100061 |
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| 基金项目： | 国家自然科学重点基金项目(41030744); 国家“十一五”科技支撑计划项目(2007BAC28B01); 城市与区域生态国家重点实验室科研专项资助 |
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| 摘 要： | 2008年4-10月,为明确典型城市绿化树种紫玉兰耗水特征的影响因素,研究了紫玉兰树干液流对北京市空气温湿度、辐射、风速、土壤温度和含水量、降雨等环境因子的响应.结果表明:影响紫玉兰树干液流的8个环境因子可分为蒸发需求因子(EDI)、土壤因子和降水因子3类,其中,EDI(大气温度、空气相对湿度、总辐射、风速和水汽压亏缺)是影响紫玉兰树干液流的关键因子,可以解释紫玉兰树干液流变化的60%,且紫玉兰树干液流对EDI的响应方式呈S型曲线,液流达到最大值后,即使光照和蒸发需求增加,液流也不再增加;土壤因子(土壤温度和土壤含水量)和降水因子(降水量)对紫玉兰树干液流的影响很小.
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| 关 键 词： | 城市树木 热消散技术 树干液流 主成分分析 紫玉兰 |
Magnolia liliiflora whole-tree sap flow in response to multiple environmental variables in Beijing |
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| Wang H,Ouyang ZY,Zheng H,Ren YF,Gao FY.Magnolia liliiflora whole-tree sap flow in response to multiple environmental variables in Beijing[J].Chinese Journal of Applied Ecology,2011,22(3):571-576. |
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| Authors: | Wang Hua Ouyang Zhi-yun Zheng Hua Ren Yu-fen Gao Fu-yuan |
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| Institution: | WANG Hua1,OUYANG Zhi-yun1,ZHENG Hua1,REN Yu-fen1,GAO Fu-yuan2(1State Key Laboratory of Urban and Regional Ecology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China,2Beijing Teaching Botanical Garden,Beijing 100061,China) |
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| Abstract: | In order to clarify the environmental factors affecting the water use of typical urban tree species Magnolia liliiflora,an investigation was conducted on the responses of M.liliiflora whole-tree sap flow to the air temperature,air relative humidity,radiation,wind speed,soil temperature and water content,and precipitation in Beijing from April to October,2008.The eight environmental factors affecting M.liliiflora whole-tree sap flow could be divided into three categories,i.e.,evaporative demand index,soil in... |
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| Keywords: | urban tree thermal dissipation method sap flow principal components analysis Magnolia liliiflora |
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