【摘要】 对海南岛北部玄武岩上发育的成土年代系列土壤的研究表明 ,土壤中高岭石含量随风化成土年代的增加而逐渐增高 ,至富铁土时含量已达最高 ,之后含量下降。三水铝石含量逐渐增加。赤铁矿含量和结晶程度也随风化成土年代增加而增高。磁赤铁矿也有增加的趋势更多还原

【Abstract】 The chronosequence of soils, developed from basalt in northern Hainan island, southern China was studied. The results showed that, with the age of soil formation increasing, the content of clay in soils added, and the ratios of silt/clay and sand/clay decreased. Meanwhile, the content of kaolinite increased to its maximum at the phase of Ferrosols, and then descended. The content of gibbsite and hematite ascended gradually and the crystallity of hematite improved with the ageing of soil formation increasing.Besides, maghemite in soil clays tended to increasing.更多还原