辽宁省白浆化土壤中白土层的特征及其形成

本文以辽宁省浑河在不同历史时期形成的阶地上的黄土状物质发育的土壤为研究对象,通过对剖面形态学特征、基本理化性质和母质均一性判定等研究,探讨了浑河三级阶地白浆化土壤的白土层特征及其形成机制。结果显示:(1)土壤粉粒中的稳定元素钛与锆分析结果表明在三级阶地上的21-003、21-009、07和21-076剖面和二级阶地上的21-001、21-200、03和04剖面的母质均一;(2)由于土体发育程度不同,一级阶地土体中无淀积层;二级阶地土体中有淀积层且无白土层,尚未出现白浆化现象;三级阶地土体中淀积层和白浆化现象明显,出现了白土层,其形成以黏粒的机械淋溶和潴育淋溶为主;三级阶地上土壤比二级阶地和一级阶地发育时间长,但尚未达到漂白层的标准。

Characteristics of the Pale Color Horizon in Albic Soils in Liaoning Province and Their Forming Processes

The thesis investigated the morphology, basic properties and homologous to determine study on the different periods of Hun River Liaoning Province, to discuss feature of Albic soils on the third terrace in Hun River of Liaoning Province. The results showed that: (1) The results show of Titanium, and Zirconium in silt that third terrace profiles of 21-003,21-009,07,21-076 and second terrace profiles of 21-001,21-200,03,04 are same parent material(2) Due to the degree of development is weak, no illuvial horizon on first terrace, no Horizon of White and Albic phenomenon on second terrace; however there are Horizon of White and Albic phenomenon on third terrace, its formation to storage the eluviation and clay mechanical leaching is given priority to, Its causes are long development time than second terrace and first terrace, but have not yet reached the standard of bleached horizon.