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Desert shrub stemflow and its significance in soil moisture replenishment

Wang, Xinping LU ; Wang, Z. -N.; Berndtsson, Ronny LU ; Zhang, Y. -F. and Pan, Y. -X. (2011) In Hydrology and Earth System Sciences 15(2). p.561-567
Abstract
Stemflow of xerophytic shrubs represents a significant component of water replenishment to the soil-root system influencing water utilization of plant roots at the stand scale, especially in water scarce desert ecosystems. In this study, stemflow of Caragana korshinskii was quantified by an aluminum foil collar collection method on re-vegetated sand dunes of the Shapotou restored desert ecosystem in northwestern China. Time domain reflectometry probes were inserted horizontally at 20 different soil profile depths under the C. korshinskii shrub to monitor soil moisture variation at hourly intervals. Results indicated that 2.2 mm precipitation was necessary for the generation of stemflow for C. korshinskii. Stemflow averaged 8% of the gross... (More)
Stemflow of xerophytic shrubs represents a significant component of water replenishment to the soil-root system influencing water utilization of plant roots at the stand scale, especially in water scarce desert ecosystems. In this study, stemflow of Caragana korshinskii was quantified by an aluminum foil collar collection method on re-vegetated sand dunes of the Shapotou restored desert ecosystem in northwestern China. Time domain reflectometry probes were inserted horizontally at 20 different soil profile depths under the C. korshinskii shrub to monitor soil moisture variation at hourly intervals. Results indicated that 2.2 mm precipitation was necessary for the generation of stemflow for C. korshinskii. Stemflow averaged 8% of the gross precipitation and the average funnelling ratio was as high as 90. The soil moisture in the uppermost soil profile was strongly correlated with individual rainfall and the stemflow strengthened this relationship. Therefore, it is favourable for the infiltrated water redistribution in the deeper soil profile of the root zone. Consequently, stemflow contributes significantly to a positive soil moisture balance in the root zone and the replenishment of soil moisture at deeper soil layers. This plays an important role in plant survival and the general ecology of arid desert environments. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Hydrology and Earth System Sciences
volume
15
issue
2
pages
561 - 567
publisher
European Geophysical Society
external identifiers
  • wos:000287797500009
  • scopus:79951662178
ISSN
1607-7938
DOI
10.5194/hess-15-561-2011
language
English
LU publication?
yes
id
9159ee47-b3b3-42a5-b286-52f64199fea5 (old id 1964454)
date added to LUP
2011-05-23 14:51:38
date last changed
2017-07-23 03:06:09
@article{9159ee47-b3b3-42a5-b286-52f64199fea5,
  abstract     = {Stemflow of xerophytic shrubs represents a significant component of water replenishment to the soil-root system influencing water utilization of plant roots at the stand scale, especially in water scarce desert ecosystems. In this study, stemflow of Caragana korshinskii was quantified by an aluminum foil collar collection method on re-vegetated sand dunes of the Shapotou restored desert ecosystem in northwestern China. Time domain reflectometry probes were inserted horizontally at 20 different soil profile depths under the C. korshinskii shrub to monitor soil moisture variation at hourly intervals. Results indicated that 2.2 mm precipitation was necessary for the generation of stemflow for C. korshinskii. Stemflow averaged 8% of the gross precipitation and the average funnelling ratio was as high as 90. The soil moisture in the uppermost soil profile was strongly correlated with individual rainfall and the stemflow strengthened this relationship. Therefore, it is favourable for the infiltrated water redistribution in the deeper soil profile of the root zone. Consequently, stemflow contributes significantly to a positive soil moisture balance in the root zone and the replenishment of soil moisture at deeper soil layers. This plays an important role in plant survival and the general ecology of arid desert environments.},
  author       = {Wang, Xinping and Wang, Z. -N. and Berndtsson, Ronny and Zhang, Y. -F. and Pan, Y. -X.},
  issn         = {1607-7938},
  language     = {eng},
  number       = {2},
  pages        = {561--567},
  publisher    = {European Geophysical Society},
  series       = {Hydrology and Earth System Sciences},
  title        = {Desert shrub stemflow and its significance in soil moisture replenishment},
  url          = {http://dx.doi.org/10.5194/hess-15-561-2011},
  volume       = {15},
  year         = {2011},
}