THE GENESIS AND DEVELOPMENT OF STABILIZED SAND DUNE SOILS IN CENTRAL EASTERN PART OF THE MOYUSU DESERT OF THE ORDOS PLATEAU
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Abstract:
The present paper is dealing with genesis and development of the stabilized sand dune soils of the surveyed area. Fixed sand dunes are particularly widespread in the Moyusu Desert region of the Ordos Plateau. They are luxuriantly covered with natural vegetation of psammophyte, such as Artenzisia ordosica and Caragana microphylla Var. tonzentosrz. A great deal of zonal vegetation such as Aster alticus, Pennisetum flaccidum and Lespedeza dahurica occurs as praticipant on the dunes. In addition to the psammpohyte, even Junipenus sabina formation, as scrubs creeping on the dunes, also occupies a considerable area of the dunes. Field observation and laboratory studies show the following genetic properties of the sandy soils. There are few perfect developed profiles, the surface layer has alternatly been modified by wind erosion or sand burying. Although there is no differentiation between the humus horizon and calcium carbonate layer, however, on the well-drained stabilized sand dunes have, more or less, a profile development with A and AB horizons, sometimes, even an incipient development of calcium carbonate horizen. Whereas, looking over the profile of the soils underJuniperus sabina formation one cannot help being struck by the fact that there are A00 and A0 horizons, underlying the A00 layer lichen and moss are widespread.
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