中国土壤胶体研究Ⅲ.褐土胶体的矿物组成
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SOIL COLLOID RESEARCHES Ⅲ. THE MINERALOGICAL CONSTITUENTS OF THE CLAY FRACTION OF DRAB SOILS
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    摘要:

    褐土广布我国华北地区,常与棕色森林土和浅色草甸土相伴发生[1,5]。关于华北地区褐土的发生类型、形成环境、分布规律以及演变过程的研究,已有详细报告[2],本文拟就粘土矿物组成方面阐明褐土的性质,特选出几个土壤剖面,分离其胶体(小于1微米)部分,进行矿物组成的研究。

    Abstract:

    The mineralogical constituents of the clay fraction(<1μ) of drab soils,including brown-drab soils,leached drab soils,typical drab soils,yellowish drab soils,and meadow drab soils were investigated by chemical analysis,cation-exchange capacity determinations,X-ray diffraction and differential thermal analysis.Data of chemical analysis show relatively higher contents of Fe2O3 and Al2O3 in these soils,as compared with the contents of the brown forest soils.The characteristic clay minerals of the drab soils as shown by X-rah diffraction patterns and thermo-differential curves are illite and vermiculite,with kaolinite and montimorillonite as minor constituents.The amount of vermiculite tends to increase from lower horizons to the upper.The soils possess a silica-sesquoxide ratio of 2.5-3.1,K2O content 2.2-2.6,and canon-exchange capacity 45-60 m.e./100g.Characteristics of mineralogical constituent of drab soils are closely related to their parent materials and also to their environments of soil formation.Soils developed on the lossal deposits contain montmorillonite,but no interstratified clay minerals,whereas soils developed on the weathering products of metamorphic rocks apparently contain ractoriteillite interstratified clay minerals (11.4Å).

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许冀泉.中国土壤胶体研究Ⅲ.褐土胶体的矿物组成[J].土壤学报,1961,9(Z2):103-109. HSU CHI-CHUAN. SOIL COLLOID RESEARCHES Ⅲ. THE MINERALOGICAL CONSTITUENTS OF THE CLAY FRACTION OF DRAB SOILS[J]. Acta Pedologica Sinica,1961,9(Z2):103-109.

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  • 在线发布日期: 2013-05-20
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