成土年龄对雷琼地区玄武岩母质土壤剖面中常量元素迁移的影响

摘要

We studicd the effect of soil age on the weathering and soil forming processes of the chronosequential soils derived from basalts in Leiqiong area The result showed that easy dissolving elements mobiled faster in profiles formed earlier, reflecting mobilization accumulation; in profiles formed late, mobilization changed obviously with the increase of the soil age. The effect of soil age on the macro-element mobilization was significant at the earlier stage but then weakened significantly when pedogenesis to a certain degree.%以雷琼地区不同发育时序的玄武岩母质土壤为研究对象,研究了成土年龄对风化成壤作用的影响.结果表明,成土年龄大的剖面中易溶元素的淋失率高,体现了迁移累积效应；而年轻的剖面中元素迁移率则随成土年龄的变化更加明显.故成土年龄对常量元素迁移率的影响具有一定的阶段性特征,早期影响显著,当风化成壤作用进行到一定程度后,成土年龄的影响明显减弱.