| 生物土壤与生态 |
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| Study on Spatial Heterogeneity of Soil Water Contents in Oasis-desert Belt of Minqin |
| ZHANG Kai1,2,3, FENG Qi1, L Yong-qing4, ZHANG Bo4, SI Jian-hua1 |
| 1.Cold and Arid Region Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China; 2.Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province/Key Open Laboratory of Arid Change and Disaster of CMA, Institute of Arid Meteorology, China Meteorological Administration, Lanzhou 730020, China; 3.Dingxi Meteorological Service, Dingxi 743000, China; 4.Department of Geographic and Environmental Science, Northwest Normal University, Lanzhou 730070, China |
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Abstract Based on field tests and laboratory analysis, spatial heterogeneity of soil water contents in oasis-desert belt of Minqin was studied. Results show that the maximum value of soil water contents is located in oasis, and the minimum values is shown up in oasis-desert transitional belt. The soil water contents increase gradually from the surface layer to bottom layer of the soil in oasis. The soil water contents are low at surface soil layer and bottom soil layer in oasis-desert transitional belt, but it is high at middle soil layers. Vertical variation of soil water contents in desert is just opposite to that in oasis-desert transitional belt. The greatest variation coefficient of soil water contents occurs in oasis-desert transitional belt, and the smallest variation coefficient of soil water contents appear at oasis. The optical simulation models of soil water contents in different layers are not completely identical. The soil water contents has not strong spatial autocorrelation, and they are largely affected by random factors.
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Received: 23 December 2010
Published: 20 September 2011
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2011, Vol. 31 
