基于Web的中国土种数据库

Web Based Soil Type Database of China

来源于第二次全国土壤普查汇总成果的中国土种数据库是目前最全面的全国性土壤数据库。它收录了20世纪80年代我国主要土种的分布、面积、性状、土地利用情况和生产性能等资料。自2000年以来,中国科学院南京土壤研究所开始建设基于Web的中国土种数据库,构造了一个包括地点与土壤类型的空间分布关系和依据中国土壤发生分类系统的分类层次关系的实体-关系(entity-relationship,E-R)数据模型,形成了具有2 473个土种典型剖面、8 751个发生层及物理化学性质的数据产品。该数据库可通过互联网广泛应用于土地退化评估、环境影响研究以及土壤碳储量研究,亦可作为基础数据指导农业生产。

Soil type database of China based on the second national soil survey is the most comprehensive soil data resource on the national scale. It embodies most soil types throughout the country in the 1980＇s, including distribution, area, characteristics, land-use and product performance of these soil types. Since 2000, the task of building the web based soil type database of China has been undertaken by Institute of Soil Science, Chinese Academy of Sciences. An entity-relationship （E-R） data model was constructed which involved the spatial relationship between location and soil type, and the classification relationship according to Genetic Soil Classification of China. The database contains 2 473 typical profiles, 8 751 soil horizons and the corresponding physical and chemical properties. The database can be widely used for land degradation evaluations, environmental impact studies, and soil carbon sequestration studies. It also can be used as a basic data for agricultural practices.