| 一些景观树对灾害天气事件的非对称响应 |
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| 引用本文： | 王斐,张继权.一些景观树对灾害天气事件的非对称响应[J].灾害学,2011,26(2):5-10,30. |
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| 作者姓名： | 王斐 张继权 |
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| 作者单位： | 1. 山东省林业科学研究院,山东济南,250014
2. 东北师范大学城市与环境科学学院,吉林长春,130024 |
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| 基金项目： | 国家自然科学基金(41071326); 全球变化研究国家重大科学研究计划(2010CBP51102) |
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| 摘 要： | 2004-2008年日本山口市的气候呈现出明显变化和波动的特点,突出表现在2004、2006和2007年。夏季极端高温和强台风伴随着无雨和持续的干旱等类似的灾害天气事件诱发了许多乔灌木景观树明显的可视被害症状。用压力室法对北美枫香树叶的观测表明,迎风面和被风面之间叶水势的差异来自于迎风面的叶、枝和树干对被风面的遮挡作用。因为台风或其他灾害天气事件持续地单向袭击树冠的一侧,山口市的一些景观树种迎风面和被风面之间表现出明显的叶面积、树冠面积和SPAD值的差别。灾害天气事件袭击期间的自我遮挡和灾后恢复期间的不平衡生长成为山口市景观树木偏冠的两个主要起因。许多木本植物从末端到基部的脱水特性似乎是它们响应灾害天气事件的一种重要的机制。修枝可以人为地削减蒸腾表面积以维持植株水分平衡,这使它成为一种修复被害树木的重要方式。
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| 关 键 词： | 景观树 灾害天气事件 偏冠 自身遮挡 非对称生长 日本山口市 |
Asymmetric Response of Landscape Trees to Disastrous Weathers |
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| Wang Fei,Zhang Jiquan.Asymmetric Response of Landscape Trees to Disastrous Weathers[J].Journal of Catastrophology,2011,26(2):5-10,30. |
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| Authors: | Wang Fei Zhang Jiquan |
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| Institution: | Wang Fei1 and Zhang Jiquan2(1.Shandong Forestry Research Institute,Jinan 250014,China,2.Urban and Environmental Science College,Northeast Normal University of China,Changchun 130024,China) |
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| Abstract: | Characteristics of significant climate changes and fluctuation from 2004 to 2008,especially in 2004,2006 and 2007 in Yamaguchi,Japan were observed.Disastrous weathers as extremely high temperature in summer and strong typhoon with no rain and persistent drought induced evident visible damages of landscape trees or shrubs.The observation of leaf water potential difference between windward and leeward sweet gum trees suggests that the leaf water potential difference is resulted from sheltering of the leeward ... |
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| Keywords: | landscape tree disastrous weather asymmetric crown self-shelter asymmetric growth Yamaguchi |
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