Stem Sap Flow Dynamics of Atraphaxis Bracteata in Mu Us Sandy Area

GUO Yue; DING Guodong; WU Bin; ZHANG Yuqing; WEI Liwei; LIANG Wenjun; WANG Zhibo; MAO Zhenhua

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Stem Sap Flow Dynamics of Atraphaxis Bracteata in Mu Us Sandy Area

- Stem Sap Flow Dynamics of Atraphaxis Bracteata in Mu Us Sandy Area
- Bulletin of Soiland Water Conservation Vol. 29, Issue 5, Pages: 22-26(2010)
- 作者机构：
  
  1. 北京林业大学水土保持学院水土保持与荒漠化防治教育部重点实验室,北京,100083
  2. 内蒙古农业大学生态环境学院,内蒙古,呼和浩特,010019
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2010
- 稿件说明：
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GUO Yue, DING Guodong, WU Bin, et al. Stem Sap Flow Dynamics of Atraphaxis Bracteata in Mu Us Sandy Area[J]. Bulletin of Soiland Water Conservation, 2010, 29(5): 22-26.
DOI：

GUO Yue, DING Guodong, WU Bin, et al. Stem Sap Flow Dynamics of Atraphaxis Bracteata in Mu Us Sandy Area[J]. Bulletin of Soiland Water Conservation, 2010, 29(5): 22-26. DOI：

摘要

植物的茎干液流量表征其蒸腾耗水量

能够准确反映单株植物的蒸腾作用和水分利用状况。利用Dynamax茎流测量系统和自动气象站对毛乌素沙地人工灌木树种沙木蓼的茎干液流变化及其周围的环境因子进行观测。研究结果表明

(1)沙木蓼茎干液流日变化呈多峰线型

昼夜变化明显

夜间仍有低值液流;晴天液流速率较大

变化幅度也大;阴雨天液流速率变化幅度较小但波动剧烈。(2)整个生长季沙木蓼总液流量为428.83L

5—10月沙木蓼日平均液流量为2.6395L/d。(3)沙木蓼液流速率变化趋势与环境因子变化趋势基本吻合。相关分析表明

影响沙木蓼茎干液流变化的主要环境因子为太阳总辐射、空气温度、空气相对湿度和风速。

Abstract

Stem sap flow of a plant can indicate water consumption by transpiration and accurately reflect the transpiration of plants and water utilization.In this study

Dynamax sap flow measuring system and automatic weather station system were used to simultaneously measure and monitor sap flow velocity and related environmental factors of the artificial shrub Atraphaxis bracteata in the Mu Us sandy area.Results showed that(1)the diurnal variation of stem sap flow of Atraphaxis bracteata presented a multi-peaked curve.At night

there was still stable flow of low value.The magnitude of sap flow changed considerably between sunny and rainy days.(2)Throughout the growing season

the total sap flow is 428.83 L

with the average daily sap flow of 2.639 5 L/d.(3)The flow rate of Atraphaxis bracteata was positively correlated with some ambient environmental factors.Correlation analysis showed that by the coefficients from correlation analysis

the order of factors was solar radiation air temperature air relative humiditywind speed.

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