太白山北坡基带土壤发生特性及系统分类

根据野外调查资料和典型土壤剖面理化性质室内化验数据综合分析表明，太白山北坡基带土壤腐殖质累积较弱，淋溶作用中等，土壤溶液呈中性反应，阳离子代换能力强，盐基饱和度高；剖面分化发育好，形成具有典型硅铝特性的粘化Ｂ层，铁的游离度低而活化度高，土壤风化弱，发育程度较低。基带土壤属于系统分类中的简育干润淋溶土土类、普通简育干润淋溶土亚类。

Genesis Characteristics and Taxonomy of Base Zone on the Northern Slope of the Taibai Mountain

The comprehensive analysis results of the out- door investigation data and in-door test data of physical and chemical properties of soil profile showed that thebase zone soil in the northern slope of the Taibai Motintain has the proterties of weakacctimulation of htimusl,medium soil leaching,neutral reaction of soil solution,strongcarlon exchange capacity,hish BS,well-developed profile dissosiation,already-formedargillic B Horizon with typic siallic property,low Fed/Fet and high Feo/Fed,low degreeof weathering and development.The base zone soil is classified as the Hap Ustic Luvisolsgrotip and Typ Hap Ustic Luvisols subgrotip in the Chinese Soil Taxonomy(RevisedProposal).