The Ustic Isohumisol (Chernozem) distributed over the Chinese Loess Plateau: Modern soil or palaeosol?
作者： Chun Chang Huang , Jiangli Pang , Hongxia Su , Lijun Wang , Yizhi Zhu
DOI: 10.1016/J.GEODERMA.2009.02.016
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摘要: Abstract The Ustic Isohumisol (Chernozem), widely distributed over the Chinese Loess Plateau, is classified as a modern soil by agricultural pedologists and palaeosol geoscientists. High-resolution investigations into this soil, including field observations, element analysis, optically simulated luminescence dating measurements of magnetic susceptibility particle-size distribution, were carried out plateau uplands. results show that formation physico–chemical properties development profiles has kept pace with land surface growth because incessant dust accumulation during Holocene. continuously intensified weathering accumulated from 11,500 B.P. had resulted in an increased chemical differentiation through time early occurred uplands between 8500 3100 B.P., when reached its maximum precipitation ample moisture response to mid-Holocene Climatic Optimum. sustained for ca. 5400 years ceased at A major pedogenic regression climatic aridity Plateau. newly loess topsoil buried depth 50–80 cm general. been incorporation reworked components runoff erosion–redeposition. Large-scale reclamation extended 2170 An landscape dry farming formed since 1500 Thereafter, present affected cultivation addition barnyard manure history. solubles are retained climate scant moisture.
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