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雷州半岛南部第四纪火山岩台地发育的红土剖面由碱性玄武岩风化型(Ⅰ型)和拉斑玄武岩风化型(Ⅱ型)组成。从首次构建的淋溶系数(L) 水化系数(H) 氧化系数(O)关系图(简称LHO图)发现 ,两类剖面的LHO曲线的演化途径完全不同。Ⅰ型红土在潮湿贫氧环境下形成 ,富含Fe、Al、Ti、水和有机质 ,Ⅱ型红土在干旱富氧环境下形成 ,富含Ca、Mg、Na、K、P和Si。此外 ,对两种类型红土成土环境的转型机制和成土环境的旋回变化进行了初步研究
The laterite profile developed in the Quaternary volcanic platform in southern Leizhou peninsula is composed of alkaline basalt weathering type (Ⅰ) and tholeiitic basalt weathering type (Ⅱ). The LHO curves of two types of profiles were completely different from the first constructed L (H) oxidation coefficient (L) plot of leaching coefficient (L). Type I laterite is formed in humid and oxygen-depleted environment, and is rich in Fe, Al, Ti, water and organic matter. Type II laterite is formed under drought and oxygen-rich environment and is rich in Ca, Mg, Na, K, P and Si. In addition, the transformation mechanism of the two types of lateritic soil-forming environment and the cycle change of the soil-forming environment were studied