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| Dynamic and Spatial Distribution of Soil Moisture in an Artificially Re-vegetated Desert Area |
| Wang Yanli1,2, Liu Lichao1, Gao Yanhong1, Yang Haotian1,2, Li Gang1,2 |
1. Shapotou Desert Research and Experiment Station, Cold and Arid Regions Environment and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract Soil moisture is the prime limiting factor for vegetation growth and development in arid area. Understanding the dynamic characteristic of soil moisture is important to vegetation construction. From 2009 to 2013, we measured soil moisture dynamics of artificially re-vegetated desert area of Shapotou, Ningxia, China. The results showed that: (1) rainfall was the major factor affecting the soil moisture dynamic. Soil moisture was over-consumed in general, in which there was no significant rise during non-growing season. (2) Soil moisture consumed slowly from April to May, which lost rapidly from June to August, and became relatively steady from September to October. (3) The general trend of soil moisture was "S" shape with increasing soil depth. Shallow soil moisture content was higher than other layers. The soil moisture content of the 200 cm layer was low and changed little during five years (1.53%-2.10%). (4) Soil moisture was higher and changed more dramatically in wet years than dry years. When soil moisture was lower, the variation increased with soil moisture's increasing. (5) The shrub coverage showed a gradually decreasing trend and the coverage of grass differed greatly among the five years. Over all, soil moisture, affected by temporal and spatial distribution of precipitation, was the major drive force of succession of re-vegetation area in Shapotou.
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Received: 21 April 2014
Published: 20 July 2015
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2015, Vol. 35 
