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[1]ZHANG Jinhu,WANG Naiang,NIU Zhenmin,et al.Spatiotemporal Dynamics of Soil Moisture of Tamarix laxa Land in the Mega-dunes of Badain Jaran Desert[J].Research of Soil and Water Conservation,2018,25(04):92-97.

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Spatiotemporal Dynamics of Soil Moisture of Tamarix laxa Land in the Mega-dunes of Badain Jaran Desert

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 04 Page number: 92-97 Column: Public date: 2018-06-13

Title:: Spatiotemporal Dynamics of Soil Moisture of Tamarix laxa Land in the Mega-dunes of Badain Jaran Desert

Author(s):: ZHANG Jinhu^1,2, WANG Naiang¹, NIU Zhenmin¹, SUN Jie¹, ZHANG Lülü¹; 1. College of Earth Environmental Sciences, Lanzhou University, Lanzhou 730000, China;
2. State Key Laboratory Breeding Base of Gansu Desertification and Aeolian Sand Disaster Combating, Gansu Desert Control Research Institute, Lanzhou 730000, China

Keywords:: mega-dunes; Tamarix laxa; soil moisture; Badain Jaran Desert

CLC:: S793.5;S152.7

DOI:: -

Abstract:: In order to explore the soil water characteristics and the response to extreme precipitation events, we used EM50 to monitor the 10—210 cm soil moisture dynamics of woodland and similar sites bare sand, and used MAWS301 automatic weather station to monitor regional precipitation. The basic characteristics, temporal and spatial dynamics of soil moisture and their response to precipitation had been analyzed. The results showed that: (1) the average soil moisture of Tamarix laxa land (10—210 cm) was 1.88%, which is slightly higher than that of bare sand (1.74%); (2) the soil water content of Tamarix laxa land was characterized as the high content in shallow layer (10—70 cm), low content in middle layer (70—150 cm) and high content in deep layer (150—210 cm), and the shallow layer was slightly lower (p>0.05), the middle layer was similar and the deep layer was significantly higher(p<0.01) compared with the bare sand; (3) the soil water of Tamarix laxa land had bigger variability and was sensitive to extreme precipitation events. The average soil moisture variability is 58.67%, which was 4.26 times higher than the sand; the precipitation infiltration was up to 200 cm in Tamarix laxa land, while it was less than 60 cm in the bare sand. The soil moisture of Tamarix laxa land was mainly affected by precipitation, moreover, the precipitation redistribution process was changed by Tamarix laxa, which promoted the depth of precipitation infiltration, and kept the higher soil moisture.

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