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Journal of Arid Land
Research Articles     
Variation in soil water content to rainfall under Caragana microphylla shrub in Horqin Sandy Land
ShaoKun WANG, XueYong ZHAO, Hao QU, YaYong LUO, JianYing YUN
1 Naiman Desertification Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China; 2 Graduate University of Chinese Academy of Sciences, Beijing 100039, China
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Abstract   In order to investigate the spatio-temporal variability of soil water content to rainfall under Caragana microphylla shrub in Horqin Sandy Land, a plot of 25 m × 25 m, where there were 6 shrub canopies of C. microphylla, was sited for measuring soil water content at two soil layers of 0-20 cm (top layer) and 20-40 cm (lower layer). Soil water content was measured on the 1st, 5th, 10th and 15th day after a 42 mm rainfall in Naiman of Inner Mongolia. The results showed that soil water contents at both layers under C. microphylla shrub were gradually decreased after the rain. Soil water content at the top layer outside the shrub canopy was higher than that inside the shrub canopy within 5 days, and became similar inside and outside the shrub canopy on the 10th day after the 42 mm rainfall, and it was lower outside than that inside the shrub canopy on the 15th day. The soil water content at lower layer in the area without shrubs was higher than that under shrub canopy all along. All the measured values of soil water content can be fitted to a variogram model. There was significant autocorrelation of the values of soil water content between top layer and lower layer, except for the fourth measured values of soil water content at top layer. The range and spatial dependence of soil water content at top layer were lower than that at lower layer.

Key wordsTaklimakan Desert      SAVI      Landsat MSS      JERS-1 OPS      vegetation      false color      landcover change     
Received: 07 April 2010      Published: 07 September 2010
Corresponding Authors: ShaoKun Wang     E-mail: wangsk@lzb.ac.cn
Cite this article:

ShaoKun WANG, XueYong ZHAO, Hao QU, YaYong LUO, JianYing YUN. Variation in soil water content to rainfall under Caragana microphylla shrub in Horqin Sandy Land. Journal of Arid Land, 2010, 2(3): 174-179.

URL:

http://jal.xjegi.com/10.3724/SP.J.1227.2010.00174     OR     http://jal.xjegi.com/Y2010/V2/I3/174

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