毛乌素沙地油蒿-杨柴灌丛生态系统蒸散组分分配及其影响因子

doi:10.13287/j.1001-9332.202107.015

应用生态学报 ›› 2021, Vol. 32 ›› Issue (7): 2407-2414.doi: 10.13287/j.1001-9332.202107.015

毛乌素沙地油蒿-杨柴灌丛生态系统蒸散组分分配及其影响因子

魏宁宁^1,2,3, 母艳梅^1,2,3, 姜晓燕^1,2,3, 贾昕^1,2,3*, 高圣杰^1,2,3, 蒋燕^1,2,3, 靳川^1,2,3, 韩聪^1,2,3, 查天山^1,2,3

¹北京林业大学水土保持学院, 北京 100083;
²北京林业大学水土保持国家林业局重点实验室, 北京 100083;
³宁夏盐池毛乌素沙地生态系统国家定位观测研究站, 宁夏盐池 751500

收稿日期:2020-12-29 修回日期:2021-04-10 出版日期:2021-07-15 发布日期:2022-01-15
通讯作者: *xinjia@bjfu.edu.cn
作者简介:魏宁宁,男,1995年生,硕士研究生。主要从事荒漠灌丛生态系统蒸散发研究。E-mail:1196020090@qq.com
基金资助:
国家自然科学基金项目(32071843,31670708,32071842,31670710)和中央高校基本科研业务费专项(2015ZCQ-SB-02)

Partitioning of evapotranspiration and the influencing factors of evapotranspiration components in a shrub ecosystem dominated by Artemisia ordosica and Hedysarum fruticosum var. mongolicum in the Mu Us Desert, Northwest China

WEI Ning-ning^1,2,3, MU Yan-mei^1,2,3, JIANG Xiao-yan^1,2,3, JIA Xin^1,2,3*, GAO Sheng-jie^1,2,3, JIANG Yan^1,2,3, JIN Chuan^1,2,3, HAN Cong^1,2,3, ZHA Tian-shan^1,2,3

¹School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;
²Key Laboratory of State Forestry Administration on Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;
³Yanchi Ecology Research Station of the Mu Us Desert, Yanchi 751500, Ningxia, China

Received:2020-12-29 Revised:2021-04-10 Online:2021-07-15 Published:2022-01-15
Contact: *xinjia@bjfu.edu.cn
Supported by:
National Natural Science Foundation of China (32071843, 31670708, 32071842, 31670710) and the undamental Research Funds for the Central Universities (2015ZCQ-SB-02).

摘要/Abstract

摘要： 蒸散发(ET)是生态系统水分循环和能量流动的重要组成部分,准确估算ET及其各组分,对认识生态生理过程对水分平衡和植物水分利用策略的影响具有重要意义。本研究于2019年5月20日至9月15日,利用涡度相关技术和微型蒸渗仪对毛乌素沙地油蒿-杨柴灌丛生态系统ET、蒸发(E)和蒸腾(T)进行测定和估算,量化了油蒿-杨柴灌丛生态系统ET组分,并分析ET及其组分的季节特征及影响因素。结果表明: T为毛乌素沙地油蒿-杨柴灌丛生态系统生长季ET的主要组分,T/ET为53.1%。T/ET值随降水减少而升高,E/ET值随降水减少而减少,蒸散组分分配主要受降水调控。在季节尺度上,E与10 cm深处土壤含水量(SWC₁₀)和太阳净辐射(R_n)呈显著正相关,其中,SWC₁₀是E的主要影响因素;T随R_n和叶面积指数(LAI)的升高而升高,随30 cm处土壤含水量(SWC₃₀)的升高呈先升高后降低的单峰趋势,受到SWC₃₀、R_n和LAI的共同影响;水分是ET的主要影响因素。生长季蒸散/降水量(ET/P)为109.2%,5月ET/P为250.5%,表明生长季初期ET耗水部分来自非生长季降水。

关键词: 毛乌素沙地, 涡度相关, 微型蒸渗仪, 蒸散, 蒸腾, 蒸发

Abstract: Evapotranspiration (ET) is an important part of water cycle and energy flow in ecosystem. Accurate estimation of ET and its components is critical for understanding the impacts of ecophysiological processes on ecosystem water balance and plant water use strategy. Using the eddy-covariance technique and the micro-lysimeter, we measured ET, evaporation (E), transpiration (T) of the Artemisia ordosica-Hedysarum fruticosum var. mongolicum shrubland in the Mu Us Desert during May 20 to September 15, 2019, quantified the ET components, and analyzed the seasonal characteristics and influencing factors of ET and its components. The results showed that T was the main component of ET in the growing season, with a T/ET of 53.1%. T/ET increased and E/ET decreased as precipitation decreased. The partitioning of evapotranspiration was regulated by precipi-tation. At the seasonal scale, the value of E was positively correlated with soil water content at 10 cm depth (SWC₁₀) and net radiation (R_n), while SWC₁₀ was the main factor influencing E. The value of T increased with the increases of R_n and leaf area index (LAI), and increased first and then decreased with the increases of soil water content at 30 cm layer (SWC₃₀). T was affected by SWC₃₀, R_n and LAI. Moisture was the main influencing factor of ET. The ET/P in the growing season was 109.2% and was 250.5% in May, indicating that the water consumption of ET in early growing season was partly from the precipitation in non-growing season.

Key words: Mu Us Desert, eddy correlation, micro-lysimeter, evapotranspiration, transpiration, evaporation

魏宁宁, 母艳梅, 姜晓燕, 贾昕, 高圣杰, 蒋燕, 靳川, 韩聪, 查天山. 毛乌素沙地油蒿-杨柴灌丛生态系统蒸散组分分配及其影响因子[J]. 应用生态学报, 2021, 32(7): 2407-2414.

WEI Ning-ning, MU Yan-mei, JIANG Xiao-yan, JIA Xin, GAO Sheng-jie, JIANG Yan, JIN Chuan, HAN Cong, ZHA Tian-shan. Partitioning of evapotranspiration and the influencing factors of evapotranspiration components in a shrub ecosystem dominated by Artemisia ordosica and Hedysarum fruticosum var. mongolicum in the Mu Us Desert, Northwest China[J]. Chinese Journal of Applied Ecology, 2021, 32(7): 2407-2414.

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毛乌素沙地油蒿-杨柴灌丛生态系统蒸散组分分配及其影响因子

Partitioning of evapotranspiration and the influencing factors of evapotranspiration components in a shrub ecosystem dominated by Artemisia ordosica and Hedysarum fruticosum var. mongolicum in the Mu Us Desert, Northwest China

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