我国北亚热带白浆化土壤的成土环境

Forming Enviroment of Albic Soil in the Northern Subtropical Region of China

运用孢粉分析、石英砂表面电镜观察和土壤微形态等手段，阐述了土体内部物质来源及成土环境的差异性，上部漂白层为多种成因堆积物，为低能化学环境；下部粘淀层发育在黄土母质上，经历了高能化学环境．土体中存在粘化淀积作用．

The spare-pollen analysis, the observation of surface of the arenaceous quart under electron microscope and the soil micromrphology show the origin of the parent materials and soil forming enviroments. when loess material deposited, the climate was the warm temperature prairie-forest zone, then becomed the northern subtropical prairie forest zone. At last, the new material accumulated over the loess derived soils. The illuvial horizons were more strongly weathered under the highly chemical enviroments, and had illuviation of clays coming from the albic horizons.