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Position: Home > Articles > Genesis of Red Clay in Beijing and its Alkalinity Characteristics Chinese Journal of Soil Science 2015,46 (4) 769-773

北京地区红黏土碱性特征及其成因分析

作  者:
王秀丽;冯新伟;张凤荣;姜桂英
单  位:
河南农业大学资源与环境学院;中国农业大学资源与环境学院
关键词:
红黏土;非碳酸盐母质;碱性特征;成因分析;北京
摘  要:
以北京地区非碳酸盐母质上发育的2个红黏土剖面为研究对象,其微形态结构特征、剖面理化性质结果显示:土壤形成于古时湿热气候条件下,已基本脱钙,母质本身也不含有碳酸盐,但却表现中性至微碱性、土体内残存有微量的Ca CO3、交换性盐基离子以Ca2+为主、盐基高度饱和的碱性特征。这种碱性特征是由于现代黄土降尘所带来的碳酸盐参与到成土过程中造成的。土壤是成土因素综合作用下的产物,随着成土因素与成土过程的不断变化,应从动态发展的角度去认识和理解土壤发生学理论,才能够正确的解释土壤成土过程与土壤特性的形成原因。
译  名:
Genesis of Red Clay in Beijing and its Alkalinity Characteristics
作  者:
WANG Xiu-li;FENG Xin-wei;ZHANG Feng-rong;JIANG Gui-ying;College of Resources and Environmental Sciences, Henan Agricultural University;College of Resources and Environmental Sciences, China Agricultural University;
关键词:
Red clay;;Non-carbonate parent material;;Alkalinity characteristics;;Genetic analysis;;Beijing
摘  要:
Two red clay soil depth profiles developed from non-carbonate parent material in Beijing were investigated in this paper. The results of morphological characteristics and physicochemical properties showed that the soils were developed under hot and humid paleoclimate. The parent material does not contain carbonate, while the red clays in the soils became slightly alkaline or neutral, dominated with Ca2+in exchangeable base and high in base saturation,which indicated that the alkalinity characteristics of the soils were caused by the deposition of loess dust carbonate during the soil forming process in the modern time.

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