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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。
Two red clay profiles developed on the non-carbonate parent material in Beijing area were taken as research objects. Their microstructure and physical and chemical properties showed that the soil was basically decalcified in the hot and damp climatic conditions in ancient times, and the parent material itself It does not contain carbonate, but it shows neutral to slightly alkaline. There is a trace amount of CaCO3 remaining in the soil, and Ca2 + is the main exchangeable base ion, which is highly alkaline. This basic feature is due to the carbonate involved in the dust reduction of modern loess involved in the process of soil formation. Soil is a product under the combined effect of soil forming factors. With the changing of soil forming and soil-forming processes, it is necessary to understand and understand soil genesis theory from the perspective of dynamic development so as to correctly explain the process of soil formation and soil properties The formation of reasons.