摘要
利用采自雷州半岛和海南岛北部不同年代喷发的玄武岩发育的6种土壤,研究了土壤的游离氧化铁、铁的游离度、CEC和土壤胶体动电电位与成土母岩年龄的关系,探讨土壤表面化学性质与成土的时间和空间因素的关系。结果表明:土壤游离铁和铁的游离度与母岩年龄间存在很好的线性相关性,铁的游离度与母岩年龄间的相关性更高,土壤全铁与母岩年龄间没有相关性。土壤CEC随母岩年龄增加而降低,土壤IEP呈相反变化趋势。进一步对2个地区土壤CEC和IEP与岩石年龄进行分析表明,空间因素对这2个地区土壤性质的影响更为明显,尤其对IEP。
Through the analyses of the changes of the free iron oxides, the ratio of free iron oxides to total Fe, soil CEC and IEP of soil colloids with the age of basalt, the surface chemical properties of six soils collected from Leizhou Peninsula and northern part of Hainan Island as related to soil pedogenesis were investigated. The results indicated that both the ratio of free iron oxides to total Fe and flee iron oxides were significantly positively correlated with the age of basalt and the former was correlated with the age of basalt better, but total Fe of soils was not correlated with the age of basalt. Soil CEC decreased but IEP of soil colloids increased with the increase of the age of basalt. Further investigations suggested that the spatial pedogenesis played more important role on CEC and IEP of the soils than time factor, especially on soil IEP.
出处
《土壤》
CAS
CSCD
北大核心
2010年第2期275-279,共5页
Soils
基金
中国科学院知识创新工程重要方向项目(KZCX2-YW-409)资助
关键词
热带土壤
土壤发生和演变
土壤电化学性质
Tropical soils, Soil pedogenesis and evolution, Electro-chemical properties of soil
