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JOURNAL OF DESERT RESEARCH  2012, Vol. 32 Issue (6): 1597-1603    DOI:
Biology and Soil     
Soil Moisture Characteristics of Artemisia Ordosica Community at Different Succession Stages in Mu Us Sandy Land
ZHANG Jun-hong, WU Bo, YANG Wen-bin, LEI Ya-kai, LI Xiu-mei
Institute of Desertification Studies/State Forestry Administration Key Laboratory of Tree Breeding and Cultivation, Chinese Academy of Forestry, Beijing 100091, China
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Abstract  

Artemisia ordosica is one of common species in semi-arid sandy land, which constitutes the dominant community in the Mu Us Sandy Land and plays an important role in local ecosystem. Soil moisture is a key factor in the succession of Artemisia ordosica. In order to analyze the characteristics of soil moisture at different succession stages of Artemisia ordosica community, we used EC-5 soil moisture sensor to monitor soil moisture of Artemisia ordosica community throughout the whole growing season: pioneer species stage (shifting sand-dunes), open stage (semi-fixed sand-dunes) and blooming stage (fixed sand-dunes). Results show that there are temporal and spatial differences for soil moisture, and soil moisture at every soil layer of shifting sand-dunes is significantly higher than in the fixed and semi-fixed sand-dunes. Soil moisture is mainly influenced by rainfall, and the depth of infiltration is mainly determined by the amount of rainfall; most of rainfall of less than 10 mm is absorbed by top soil, while rainfall of 10-20 mm can infiltrate to 30-60 cm soil layer, rainfall of 30-40 mm can reach the soil depth more than 60 cm but less than 100 cm. Soil moisture above soil depth of 30 cm changes dramatically, and soil moisture at soil depth of 60 cm is relatively stable and is mainly affected by ≥30 mm rainfall, while soil moisture at depth of 100 cm and 160 cm is stable and is almost not affected by rainfall. The heterogeneity of soil moisture in fixed, semi-fixed and shifting sand-dunes is mainly caused by the differences of rain infiltration depth and roots distribution of vegetation. Soil temperature decreases with the increase of soil depth and is mainly affected by atmospheric temperature, and there is no significant correlation between soil moisture and soil temperature.

Key words:  Mu Us Sandy Land      soil moisture      soil temperature      EC-5      Artemisia ordosica     
Received:  14 January 2012      Published:  11 March 2012
ZTFLH:  S152.7  

Cite this article: 

ZHANG Jun-hong, WU Bo, YANG Wen-bin, LEI Ya-kai, LI Xiu-mei. Soil Moisture Characteristics of Artemisia Ordosica Community at Different Succession Stages in Mu Us Sandy Land. JOURNAL OF DESERT RESEARCH, 2012, 32(6): 1597-1603.

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http://www.desert.ac.cn/EN/     OR     http://www.desert.ac.cn/EN/Y2012/V32/I6/1597

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