元宝山中山土壤形成特点及系统分类

Formation characteristics and taxonomy of soils in Yuanbaoshan mountain in Guangxi

通过对元宝山的实地考察,选取具有代表性的6个山地土壤剖面进行描述及分析,研究了元宝山土壤的形成条件和特点,并按照《中国土壤系统分类:理论·方法·实践》一书要求,根据诊断层及诊断特性,检索了土壤系统分类名称。得出元宝山土壤垂直分布按海拔由低到高依次为:粘化富铝湿润富铁土-强度铝质湿润淋溶土-黄色铝质湿润淋溶土-普通铝质常湿雏形土-石质铝质常湿雏形土。

Based on field investigation and the comprehensive analysis of soil physical and chemical properties, we studied the formation characteristics of soils Yuanbaoshan mountain. The results showed that from the low to high elevation, the contents of clay decline, argillification becomes weaker, which indicates that at high elevation, the clay process is weak, the texture of soil change from clayey soil to sandy soil, the base saturation is very low, most of them less than 20%, and the content of organic carbon increases along with the increase in altitude. According to the requirements of Chinese Soil Taxonomy, the diagnostic horizon and diagnostic characteristic of six representative pedons in Yuanbaoshan mountain were identified. The soil composition spectrum of vertical zones consists of Arg-Alt-Udic Ferrisols (<600 m) Hyp-Ali-Udic Luvisols (<800 m) Xan-Ali-Udic Luvisols (800~1300 m) Typ-Ali-Perudic Cambisols (1300~1900 m) Lit-Ali-Perudic Cambisols (>1900 m).