应用离子选择性电极对的方法和技术，在野外对土壤的石灰位进行了现场测定。结果表明，华南地区不同类型土壤的石灰位有很大差异，低者小于２，高者接近６．一般说，由基性岩发育的土壤的石灰位在于酸性母质发育的土壤。土壤石灰位与土壤在ＮａＣｌ、ＢａＣｌ＿２等中性盐中的ｐＨ值之间存在着良好的相关性。 Applying the method and technology of ion-selective electrode pair, the limestone in the soil was field-measured in the field. The results show that the limestone of different types of soils in South China is quite different, the lower is less than 2 and the highest is close to 6. In general, the limestone of soils developed from basic rocks lies in soils developed from acidic parent material. There is a good correlation between the soil lime level and the pH value of soils in NaCl and BaCl 2 neutral salts.