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
[ "桂鈺翔(1999—), 男, 硕士研究生, 主要从事生态系统恢复治理研究。E-mail: 15329239365@163.com" ]
纸质出版:2025
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桂鈺翔, 彭韬, 戴全厚, 等. 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[J]. 水土保持学报, 2025,39(1):21-29.
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.
桂鈺翔, 彭韬, 戴全厚, 等. 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[J]. 水土保持学报, 2025,39(1):21-29. DOI: 10.13870/j.cnki.stbcxb.2025.01.036.
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.
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。
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.
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