土地质量评估中评价单元的划分 ——以山西忻州盆地为例

多目标区域地球化学调查、区域生态地球化学评价和土地地球化学质量评估是一项系列工程，其中土地地球化学质量评估与人类的生产、生活息息相关。土地地球化学质量评估工作非常复杂，对工作区进行评估单元的划分是核心内容。评估单元是土地地球化学质量评估的最小空间单位。以山西忻州盆地为例，采用评估区的土地利用类型图和土壤类型图相叠加的方法．对其进行国家一省级评估，为国家、省市土地的宏观管理和规划提供地球化学依据，为实现土地可持续利用的战略目标服务。

Evaluation units in the land quality assessments-A case study of the Xinzhou basin, Shanxi, China

Muir-target regional geochemical survey, regional ecogeochemical evaluation and land quality geochemical assessment are a series project, of which the geochemical land quality assessment is closely hnked with the production and hying of humans. This work is very complex, and its core is the evaluation unit classification in the work area and the evaluation unit is the smallest space unit in the land quality geochemical assessments. Take the Xinzhou basin, Shanxi, for example, the method of overlap between the map of land-use types and map of soil types in the evaluation area was used for the assessments at the national- and provincial level, providing a geochemical basis for land macro-management and planning of the country, provinces and municipalities and serving the strategic goal of sustainable land use.