NDLI: Simulation of the effect of root distribution on hydraulic redistribution in a desert riparian forest

Content Provider	Springer Nature Link
Author	Hao, Xing Ming Li, Wei Hong Guo, Bin Ma, Jian Xin
Copyright Year	2013
Abstract	Hydraulic redistribution (HR) of roots plays an important role in the water relations of desert riparian plants. In order to estimate the effect of vertical root distribution on the HR process of Populus euphratica Oliv. during the entire growth season, we performed simulation and scenario analyses based on the observed soil water potential and root distribution data. The results showed that our simulation model achieved a good accuracy. The initial value of soil water content could significantly affect the simulated soil water content at soil depths of >90 cm, but had only limited effect on soil water content in the 0- to 90-cm soil layers. Scenario analysis revealed that with increase in root distribution depth, the HR process extended from the upper and middle soil layers downward toward the middle and deeper soil layers: the deeper the root distribution, the more likely it was to trigger the HR process in deep soil layers. However, a deeper rooting system led to a decrease in the total amount of hydraulically redistributed water over the entire soil column. Redistributed water also significantly increased the soil water depletion and the soil water storage. However, the effects of redistributed water (HR vs. without HR) on water depletion and soil water storage were reduced with the deepening of root distribution. These results indicate that HR can obviously affect the moisture of the upper soil layers, while vertical root distribution significantly changes the spatial and quantitative characteristics of HR within soil columns.
Starting Page	653
Ending Page	662
Page Count	10
File Format	PDF
ISSN	09123814
Journal	Ecological Research
Volume Number	28
Issue Number	4
e-ISSN	14401703
Language	English
Publisher	Springer Japan
Publisher Date	2013-06-08
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Simulation analysis Hydraulically redistributed water Water balance Vertical root distribution Ecology Plant Sciences Zoology Evolutionary Biology Behavioural Sciences Forestry
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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