热带土壤发育过程的定量研究——以海南岛北部为例

海南岛北部不同时期喷发的玄武岩上发育的土壤构成的一个成土年代系列，由此可以定量地探讨发育过程中土壤性质随风化成土年龄增加的变化规律。研究表明土体厚度、B层厚度、RR指数、w(REE)、w(Ba)、w(Fed)/w(Fet)、w(Fed)、w(Feo)/w(Fed)、土壤硅铝率、土壤硅铁铝率、频率磁化率等土壤性质与风化成土年龄具有确定的相应关系。根据土壤发生学原则，得出土壤性质与风化成土年龄两者间的统计方程。对于成土环境相同或相近地区可从这些方程由土壤性质推断相对风化成土年龄和发育程度，也可由风化成土年龄估计土壤特性，研究成土速率。

QUANTITATIVE STUDIES ON DEVELOPMENT OF TROPICAL SOILS: A CASE STUDY IN NORTHERN HAINAN ISLAND

Based on the study of a chronosequence of soils, developed from basalts erupted in different geological times, in the northern Hainan island, the variation of soil properties with soil age increasing in its development has been discussed quantitatively. The results show that such soil properties as solum and B horizon thickness, redness rating ( RR ), w (REE), w (Ba)/ w (Nb), w (Fe d)/ w (Fe t), w (Fe d) , w (Fe o)/ w (Fe d), silica alumina molecular ratio and silica sesquioxide ratio of soils, frequency dependent susceptibility, etc. are definitely correlative to the soil ages. The statistical equations between soil properties and ages have been determined according to pedological principles. When found in the same or similar soil forming environment and regions, relative soil age and soil development degree could be inferred by soil properties which could also be evaluated by soil ages to research rate of soil formation depending on those equations.