Transpiration Characteristics of Common Trees and Their Responses to Meteorological Factors in Secondary Forests on Karst Slopes

GUI Yuxiang; PENG Tao; DAI Quanhou; LI Yanqiu

doi:10.13870/j.cnki.stbcxb.2025.01.036

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Transpiration Characteristics of Common Trees and Their Responses to Meteorological Factors in Secondary Forests on Karst Slopes

更新时间：2025-03-14

- Transpiration Characteristics of Common Trees and Their Responses to Meteorological Factors in Secondary Forests on Karst Slopes
- Vol. 39, Issue 1, Pages: 21-29(2025)
- 作者机构：
  
  1. 贵州大学林学院,贵阳,550025
  2. 中国科学院地球化学研究所环境地球化学国家重点实验室,贵阳,550081
  3. 中国科学院普定喀斯特生态系统观测研究站, 贵州普定,562100
  4. 贵州省水利科学研究院,贵阳,550002
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2025.01.036
  CLC： S792.99
- Published：2025
- 稿件说明：
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GUI Yuxiang, PENG Tao, DAI Quanhou, et al. Transpiration Characteristics of Common Trees and Their Responses to Meteorological Factors in Secondary Forests on Karst Slopes[J]. 2025, 39(1): 21-29.
DOI：

GUI Yuxiang, PENG Tao, DAI Quanhou, et al. Transpiration Characteristics of Common Trees and Their Responses to Meteorological Factors in Secondary Forests on Karst Slopes[J]. 2025, 39(1): 21-29. DOI： 10.13870/j.cnki.stbcxb.2025.01.036.

摘要

目的探究喀斯特坡地次生林常见树木蒸腾特征及其对气象因子的响应规律。方法采用热扩散探针法(TDP)对中国科学院普定喀斯特生态系统观测研究站内构树、栾树、乌桕、臭椿、苦楝树、香椿和盐肤木进行监测，同时对气象因子进行监测，分析树木蒸腾变化特征与气象因子的关系。结果 1) 构树、栾树、乌桕、臭椿、苦楝树、香椿和盐肤木的日平均蒸腾量分别为(4 409.97±3 260.63)、(6 611.27±5 629.57)、(3 956.32±2 498.50)、(2 984.98±2 039.09)、(6 300.25±4 637.71)、(780.69±738.80)、(2 320.73±1 717.18) g/d。2)构树、栾树、乌桕、臭椿、苦楝树、香椿和盐肤木的液流速率在晴天最大，其次是阴天，最小是雨天。3)在晴天条件下，大气温度(T)和饱和水汽压差(VPD)的变化对构树、栾树、乌桕、臭椿、苦楝树、香椿和盐肤木液流速率的影响最大，相对湿度(RH)次之，而总辐射照度(Eg)的影响相对较低。结论喀斯特坡地次生林常见树木的蒸腾量因特殊的水分环境受到限制，不同落叶乔木拥有着不同的水分利用策略，液流速率主要受到VPD和Eg的影响。

Abstract

Objective To explore the transpiration characteristics of common trees and their responses to meteorological factors in secondary forests on karst slopes.Methods Heat diffusion probe method (TDP) was used to monitor Broussonetia papyrifera

Koelreuteria paniculata

Triadica sebifera

Ailanthus altissima

Melia azedarach

Toona sinensis

and Rhus chinensis in Puding karst ecosystem observation and research station of Chinese academy of sciences

and to study the relationship between tree transpiration characteristics and meteorological factors.Results 1) The average daily transpiration of B. papyrifera

K. paniculata

T. sebifera

A. altissima

M. azedarach

T. sinensis

and R.chinensis were (4 409.97±3 260.63)

(6 611.27±5 629.57)

(3 956.32±2 498.50)

(2 984.98±2 039.09)

(6 300.25±4 637.71)

(780.69±738.80) and (2 320.73±1 717.18) g/d

respectively. 2) The sap flow rates of B. papyrifera

K. paniculata

T. sebifera

A. altissima

M. azedarach

T. sinensis

and R. chinensis were the highest in sunny days

followed by cloudy days

and the lowest in rainy days. 3) The influence of atmospheric temperature (T) and saturated vapor pressure difference (VPD) on B. papyrifera

K. paniculata

T. sebifera

A. altissima

M. azedarach

T. sinensis

and R. chinensis under sunny weather was the greatest

followed by that on relative humidity (RH) and total irradiance (Eg).Conclusion The transpiration of common trees in secondary forests on karst slopes is limited by special water environment. Different deciduous trees have different water use strategies

and the rate of sap flow is mainly affected by VPD and Eg.

关键词

Keywords

references

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