辽宁省朝阳市第四纪古红土基本性状与发生学特征研究  

Basic Properties and Genetic Characteristic Research of Quaternary Paleosolin Chaoyang City of Liaoning

作　　者：韩春兰[1] 刘素花[1] 王秋兵[1] 王慧强[1] 

机构地区：[1]沈阳农业大学土地与环境学院,辽宁沈阳110866

出　　处：《土壤通报》2009年第6期1233-1239,共7页Chinese Journal of Soil Science

基　　金：教育部博士点基金课题(20040157007);国家自然科学基金课题(40671079)资助

摘　　要：对辽宁省朝阳市5个具有代表性的第四纪古红土剖面进行了深入研究。研究结果显示:朝阳古红土的pH值、阳离子交换量、盐基饱和度高,个别古红土剖面出现钙质结核,表明该古红土是多元发生土壤。与朝阳市地带性土壤———褐土相比,其发育程度远高于褐土,说明其较黄土母质发育的褐土形成年代更为久远。与浙江第四纪红土相比,朝阳古红土虽然铁在B层和土体中聚积、土壤颜色一致,但铁游离度低,ba值、黏粒硅铝铁率、硅铝率、黏粒CEC高,说明该古红土脱硅富铁铝作用较弱,发育程度不深,远不如南方红土发育成熟。Five representative Quaternary Paleosol profiles in Chaoyang City of Lingning are studied and analyzed.The results are as follows：The pH, cation exchange capacity and base saturation were high, calcareous concretion was found in some profiles,which indicated the multiple soi-forming processes . Compared to the zonal soil of Chaoyang city-Cinnamon, the Paleosol developed more deeply and formed much earlier. Compared to the red soil of Zhejiang, the Ferric Oxide was enriched in soil and B layer in the palesol and its color was the same,however,in the palesol, the free degree of ferric oxide was low,weathering eluvial indexes （ba value） were high,and the ratios of SiO2/R2O3, SiO2/Al2O3,SiO2/Fe2O3,cation exchange capacity in clay were high, which indicated the desilication and allitic enrichment allitization were weak and its development was not deep and much less than the red soil of Southern China.

关 键 词：辽宁省朝阳市 古红土 发生学特征 氧化铁 

分 类 号：S153.2[农业科学—土壤学] S155.25[农业科学—农业基础科学]