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应用生态学报 ›› 2002, Vol. ›› Issue (12): 1563-1565.

• 研究论文 • 上一篇    下一篇

不同光强条件下树木释放N2O的研究

张秀君1,2, 陈冠雄1, 徐慧1   

  1. 1. 中国科学院沈阳应用生态研究所, 陆地生态过程重点实验室, 沈阳, 110016;沈阳教育学院, 沈阳, 110016;
    2. 中国科学院沈阳应用生态研究所, 陆地生态过程重点实验室, 沈阳, 110016
  • 收稿日期:2001-08-23 修回日期:2001-12-23
  • 通讯作者: 陈冠雄
  • 基金资助:
    国家自然科学基金项目(49701016;39770066);中国科学院百人计划资助项目

N2O emission from trees under different light irradiances

ZHANG Xiujun1,2, CHEN Guanxiong1, XU Hui1   

  1. 1. Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016;
    2. Shenyang College of Education, Shenyang 110016
  • Received:2001-08-23 Revised:2001-12-23

摘要: 首次采用封闭罩法,对阳生树木(水曲柳、红松和赤杨)及阴生树木(椴树)的连体及离体枝叶在不同光强下的N2O 释放进行了野外原位观测.结果表明,阳生树木与阴生树木的N2O 释放对光的反应不同.阳生树木的N2O 释放受光强的调节规律同以往对农作物等的研究结果一致;而阴生树木椴树的N2O 释放速率在强光下N2O 释放较多,弱光下释放减少甚至吸收大气N2O,其N2O 释放速率与光强呈显著线性正相关关系.

关键词: 光强, 阳生树木, 阴生树木, N2O 释放, 叶面积指数, MODIS反射率, 植被指数, 竹林, BP神经网络

Abstract: This paper firstly measured in situ N2O emission from branches and leaves of sun plants (Fraxinus mandshurica,Pinus koraiensis,Alnus hirsuta) and shade tolerant plants (Tilia amurrensis) under different light irradiances in closed chamber. Light irradiance had contrast effects on N2O emission flux from sun and shade tolerant tree species. In the test sun plants,more N2O was emitted under weak light than under strong light. The emission rates decreased with increasing irradiances,and even absorption instead of emission of N2O was detected under strong light. In contrast to sun plants,in the shade tolerant plant T.amurrensis,there was more N2O emission under strong light than under weak light,and N2O absorption from environment was detected under weak light.

Key words: Light irradiances, Sun plant, Shade tolerant plant, N2O emission, vegetation index, MODIS reflectance, Back Propagation neural network, bamboo forest, leaf area index

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