Evolution of soil properties on stabilized sands in the Tengger Desert, China

被引:79
作者
Duan, ZH
Xiao, HL
Li, XR
Dong, ZB
Gang, W
机构
[1] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Urumqi 830011, Peoples R China
[2] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Key Lab Desert & Desertificat, Lanzhou 730000, Peoples R China
[3] Lanzhou Univ, State Key Lab Arid Agroecol, Lanzhou 730000, Peoples R China
基金
中国国家自然科学基金;
关键词
aeolian sandy soils; fixation of shifting sand; soil fertility; tengger desert;
D O I
10.1016/j.geomorph.2003.07.019
中图分类号
P9 [自然地理学];
学科分类号
0705 ; 070501 ;
摘要
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. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码:237 / 246
页数:10
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