Fine root distributions of shelterbelt trees and their water sources in an oasis of arid northwestern China

doi:10.1016/j.jaridenv.2016.03.004

ISWC OpenIR > 水保所科研产出--SCI > 2016--SCI

	Fine root distributions of shelterbelt trees and their water sources in an oasis of arid northwestern China
	Qingli Xiao 1,2; Mingbin Huang 2
文章类型	article
	2016-04-24
发表期刊	Journal of Arid Environments
通讯作者邮箱	hmingbin@yahoo.com
期号	130 页码:30-39
摘要	Shelterbelt trees play an important role in maintaining the sustainability of oases agricultural ecosystems, but the trees require a considerable amount of water for survival. The objectives of this study were to investigate the root distributions, transpiration and water sources of shelterbelt trees (Gansu Poplar; Populus gansuensis) in order to improve water management efficiency. Fine root and soil water distributions were investigated along three transects that passed through cropland and an adjacent shelterbelt, while sap flow measurements were conducted on six Gansu Poplar trees. Results showed that roots were mainly distributed within 5 m of both sides of an irrigation channel passing between the first and second tree rows. The maximum distance to which trees extended fine roots horizontally was about 18 m from the shelterbelt. In 2-m soil profiles, fine roots were mainly distributed in the 1.4e2.0 m and 0 e0.4 m layers depending on the available water sources. A positive relationship was observed between soil water and fine root mass density. Trees grown near the cropland-shelterbelt border exploited water from cropland irrigation and irrigation channel leakage, greatly enhancing their transpiration. During the growing season of 2013, the mean total transpiration of trees grown farther away from the border (10.75 and 17.45 m) was 216.9 mm, whereas for trees grown nearer to the border (0.85 and 6.30 m) the amounts were 670.1 and 488.7 mm, respectively. If the trees were assumed to absorb the same amount of water from soil, rainfall and groundwater sources, then irrigation water sources provided 67.6% and 55.6% of the water meeting the transpiration requirements of the trees closest to the border. The results have important implications for water management in oasis agricultural areas by limiting the extension of shelterbelt tree roots into adjacent cropland in order to improve irrigation water use efficiency.
关键词	Sap Flow Irrigation Water Consumption Water Management
DOI	10.1016/j.jaridenv.2016.03.004
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000376834200003
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	sbir.nwafu.edu.cn/handle/361005/7752
专题	水保所科研产出--SCI_2016--SCI
通讯作者	Mingbin Huang
作者单位	1.College of Resources and Environment, Northwest A&F University, Yangling 712100, China 2.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, China
推荐引用方式 GB/T 7714	Qingli Xiao,Mingbin Huang. Fine root distributions of shelterbelt trees and their water sources in an oasis of arid northwestern China[J]. Journal of Arid Environments,2016(130):30-39.
APA	Qingli Xiao,&Mingbin Huang.(2016).Fine root distributions of shelterbelt trees and their water sources in an oasis of arid northwestern China.Journal of Arid Environments(130),30-39.
MLA	Qingli Xiao,et al."Fine root distributions of shelterbelt trees and their water sources in an oasis of arid northwestern China".Journal of Arid Environments .130(2016):30-39.

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