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在中国东部花岗岩、玄武岩和石灰岩地区布设91个采样点，采集土壤剖面和母岩样品，测试13种微量元素的含量，研究其纬向分异规律及影响因素。结果表时：（1）土壤微量元素含量顺序为：玄武岩土壤＞石灰岩土壤＞花岗岩土壤；（2）花岗岩和玄武岩上土壤微量元素含量与母岩接近，石灰岩上土壤微量元素含量远高于母岩；（3）花岗岩上土壤微量元素的含量由北向南呈降低趋势，而玄武岩和石灰岩上土壤微量元素含量由北向南均呈增高趋势，且与游离氧化铁含量的增高同步；（4）微量元素含量与氧化铁含量在玄武岩土壤中的相关性大于这两者在花岗岩土壤中的相关性。
Ninety-one sampling sites were set up in granite, basalt and limestone areas of eastern China, soil profiles and mother rock samples were collected, and the contents of 13 trace elements were tested. The latitudinal differentiation and its influencing factors were studied. Results table: (1) The order of soil trace elements is basalt soil> limestone soil> granite soil; (2) The content of trace elements in the granite and basalts is close to that of the parent rock, and the content of trace elements in the soil is much higher than that of the parent rock ; (3) The contents of trace elements in the soil from granite decreased from north to south, and the content of trace elements in soils from basalt and limestone increased from north to south, which was in line with the increase of free iron oxide; (4) Trace elements The correlation between content and iron oxide content in basal soil is greater than the correlation between the two in granite soil.