古水耕人为土诊断层的特征与形成过程--以广汉三星堆遗址水耕人为土为例

Diagnostic Horizons Characteristics and Forming Processes of Ancient Stagnic Anthrosols——Case study on Sanxingdui site, Guanghan, Sichuan province

选定广汉三星堆遗址的典型古水耕人为土,研究剖面的诊断层特性与形成过程,取得了以下主要研究结果:形成时期长、发育程度高的古水耕人为土,在土壤剖面形态和特性上,表现出明显的层次分化。同时水耕表层结构发育,犁底层适度紧实和有一定结构发育;水耕氧化还原层表现出物质的水耕淋淀及其转化特征等。深化了水耕人为土诊断层及其形成过程的认识。对高肥力水耕人为土的培育,以及在水耕人为土系统分类研究上取得进展,都有一定意义。

The typical ancient stagnic anthrosols of Sanxingdui site had been selected to probe the diagnostic horizons characteristics and forming processes, results showed that the ancient stagnic anthrosols which were formed in long time and high developmental soil structure was observed in the degree had the characteristics of obviously horizons differentiation. In addition, anthrostagnic epipedon and moderate tightness and soil structure in the bottom of ploughed stratum. The characteristics of eluviation and illuviation were observed in the hydragric horizon. These results deepen the understanding of the diagnostic horizons and forming processes of stagnic anthrosols. Such knowledge can provide a great advantage to cultivate high fertility paddy soils and to obtain new progress in soil taxonomy.