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2008 , Vol. 23 >Issue 4: 685 - 693

DOI: https://doi.org/10.11849/zrzyxb.2008.04.016

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亚热带红壤区湿地松生长与耗水耦合关系研究

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  • 1. 南昌工程学院,南昌330029;
    2. 中国科学院 地理科学与资源研究所,北京100101;
    3. 北京林业大学 林学院,北京100083
涂洁(1980- ),女,博士,研究方向区域生态生产力。E-mail:tujie8058@163.com

收稿日期: 2006-10-16

  修回日期: 2007-12-29

  网络出版日期: 2008-07-28

基金资助

国家重点基础研究发展(973计划)项目2002CB4125;中国科学院生态网络野外台站基金。

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Coupling Relationship between Tree Growth and Water Consumption of Pinus elliottii in Subtropical Red Earth Area

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  • 1. Nanchang Institute of Technology, Nanchang 330029,China;
    2. Institute of Geographic Sciences and Natural Resources Research,CAS, Beijing 100101,China;
    3. Forestry College,Beijing Forestry University,Beijing 100083,China

Received date: 2006-10-16

  Revised date: 2007-12-29

  Online published: 2008-07-28

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摘要

采用热扩散式探针(TDP)对湿地松(Pinus elliottii)树干液流密度及其周围环境因子进行长期同步测定,同时辅以树干解析、枝条解析等树木生长量调查方法,以期探索不同尺度上湿地松水分耗失与碳蓄积特征。结果表明,液流密度与冠层温度、相对湿度、光合有效辐射总量都呈显著的线性相关关系。液流密度与上述3个因子的多元线性回归方程和回归系数的相关性检验均达极显著水平。湿地松日均耗水量与边材面积间线性相关性显著。处于低龄期的湿地松,边材面积与胸径可用二次函数很好地拟合。根据2004年湿地松树干液流观测结果和生物量调查结果,推算出湿地松在生长过程中每形成1.773 1g干物质需要消耗约1kg水分。文末还根据生物量数据推算了树木生长过程中的耗水量。

关键词： 生长量; 耗水量; 热扩散式探针; 湿地松

本文引用格式

涂洁, 刘琪璟, 林耀明, 李海涛 . 亚热带红壤区湿地松生长与耗水耦合关系研究[J]. 自然资源学报, 2008 , 23(4) : 685 -693 . DOI: 10.11849/zrzyxb.2008.04.016

Abstract

Whole-tree sap flow density (SFD) in an artificial Pinus elliottii forest was measured on six trees continuously using Granier’s thermal dissipation probe (TDP) method.Several ambient environmental factors including meteorological variables and soil variables were also measured simultaneously. At the same time,stem analysis and branch analysis were utilized to investigate tree growth.The aim of this paper was to explore the characteristics of water consumption and carbon accumulation of P.elliottii and provide scientific methods and fundamental data for the research on coupling water and carbon in subtropical area of China.The results were as follows:SFD was mainly related to some meteorological factors in stands such as canopy temperature (CT),canopy relative humidity (CRH) and photosynthetically active radiation (PAR).Correlations between SFD and the three separate factors were well expressed by linear regression models.Multiplelinear model between SFD and the integrated three factors was also established.All equations and correlation parameters were significant at 1% safety.The sequence of correlated degrees was as: CRH＞PAR＞CT.A significant linear correlation was found between daily cumulative sap flow and SWA with r2 value reaching 0.99. For P. elliottii in early growth stage,the correlation between sapwood area (SWA) and diameter at breast height (DBH) was well fitted by quadratic model.Based on sap flow observation and biomass investigation results during 2004,an important conclusion that 1.7731 gram biomass would be formed with the consumption of about 1kg water was obtained.Furthermore,water consumption was also calculated from biomass data according to the results above in the end of the paper.

Key words： tree increment; water consumption; Thermal Dissipation Probe (TDP); Pinus elliottii

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