Arid
DOI10.1002/hyp.6314
Xylem sap flows of irrigated Tamarix elongata Ledeb and the influence of environmental factors in the desert region of Northwest China
Qu, Yanping; Kang, Shaozhong; Li, Fusheng; Zhang, Jianhua; Xia, Guimin; Li, Wangcheng
通讯作者Kang, Shaozhong
来源期刊HYDROLOGICAL PROCESSES
ISSN0885-6087
出版年2007
卷号21期号:10页码:1363-1369
英文摘要

Tamarix elongata Ledeb is a desert shrub found in the desert region of Northwest China and is commonly cultivated as a sand-holding plant in this region. To understand its water requirement and the effects of climate conditions on its growth, trunk xylem sap flows of irrigated 8-year-old Tamarix elongata Ledeb plants were monitored continuously with heat-pulse sap flow meters for the entire season. Soil moisture contents at 0-300 em layer depth were also measured with a tube type time domain reflectometry (Tube-TDR). Meteorological factors, i.e. solar radiation, air temperature, relative humidity and wind speed were simultaneously monitored by an automatic weather station at the site. Daily and seasonal variations of the trunk sap fluxes and their correlations with the meteorological factors, reference evapotranspiration and soil moisture contents in the root-zone were analysed. The results indicated that frost influenced the trunk sap flux greatly under irrigated conditions, although the flux generally fluctuated with the variation of environmental factors and showed a mean trunk sap flux of 4.18 1 d(-1). There was a significantly exponential relationship between sap flux and the reference value of crop evapotranspiration, with a correlation coefficient of R-2 = 0.7172. The sap flux also had a significant correlation with the soil water contents at a depth of 150-300 cm from soil surface (R-2 = 0.5014). The order of the main meteorological factors affecting the sap flux of Tamarix elongata Ledeb trees was solar radiation > air temperature > vapour pressure deficit > relative humidity > wind speed. Copyright 2007 John Wiley & Sons, Ltd.


英文关键词xylem sap flux heat-pulse method xylem water transport desert plants Tamarix elongata Ledeb
类型Article
语种英语
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000246405700010
WOS关键词HEAT-PULSE METHOD ; SAPFLOW VELOCITY ; TRANSPIRATION ; FOREST ; TREES
WOS类目Water Resources
WOS研究方向Water Resources
来源机构西北农林科技大学 ; 中国农业大学
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/154480
作者单位(1)China Agr Univ, Ctr Agr Water Res China, Beijing 100083, Peoples R China;(2)NW Agr & Forestry Univ, Minist Educ, Key Lab Agr Water & Soil Engn Arid & Semiarid Are, Yangling 712100, Shaanxi, Peoples R China;(3)Guangxi Univ, Coll Agr, Nanning 530005, Guangxi, Peoples R China;(4)Hong Kong Baptist Univ, Dept Biol, Hong Kong, Hong Kong, Peoples R China
推荐引用方式
GB/T 7714
Qu, Yanping,Kang, Shaozhong,Li, Fusheng,et al. Xylem sap flows of irrigated Tamarix elongata Ledeb and the influence of environmental factors in the desert region of Northwest China[J]. 西北农林科技大学, 中国农业大学,2007,21(10):1363-1369.
APA Qu, Yanping,Kang, Shaozhong,Li, Fusheng,Zhang, Jianhua,Xia, Guimin,&Li, Wangcheng.(2007).Xylem sap flows of irrigated Tamarix elongata Ledeb and the influence of environmental factors in the desert region of Northwest China.HYDROLOGICAL PROCESSES,21(10),1363-1369.
MLA Qu, Yanping,et al."Xylem sap flows of irrigated Tamarix elongata Ledeb and the influence of environmental factors in the desert region of Northwest China".HYDROLOGICAL PROCESSES 21.10(2007):1363-1369.
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