Evolution of soil properties on stabilized sands in the Tengger Desert, China |
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| Authors: | Duan Zhenghu Xiao Honglang Li Xinrong Dong Zhibao Wang Gang |
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| Affiliation: | a Xinjiang Institute of Ecology and geography, Chinese Academy of Sciences; 40 Beijing South Road, Urumqi, 830011, P.R. of China;b Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences; 260 Donggang West Road, Lanzhou, 730000, P.R. of China;c State Key Laboratory of Arid Agroecology, Lanzhou University, 298 Tianshui Road, Lanzhou, 730000, P.R. of China |
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| Abstract: | The spatial and temporal patterns of pedogenesis on stabilized dunes at Shapotou, northwestern China, were studied on the time sequences of 0, 18, 35 and 43 years. The spatial pattern of soil formation was estimated by measuring the thickness of accumulated sand fractions on the stabilized dune surface and by analyzing the characteristics and properties of soil. The results showed that the environment of soil formation and circulation of soil material were influenced in the processes of shifting-sand fixation, and the mean soil particle size changed from >0.2 to <0.08 mm in 0–20 cm soil depth with the succession from cultivated plants to natural vegetation. The capacity of available soil water increased fivefold. Deep infiltration of water in soil no longer occurred due to the increase in soil water capacity and the change of redistribution of soil water in profiles. Soil microorganisms evolved from simple to complex. Interaction of these processes obviously brought about accumulation of soil fertility, evolution of soil profiles and development of the profiles towards aripsamments. The difference of micro-topography is closely related to redistribution of material and energy in soil formation. |
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| Keywords: | Author Keywords: Aeolian sandy soils Fixation of shifting sand Soil fertility Tengger Desert |
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