摘要
利用土地质量地球化学评估的基本方法,以黄河下游流域山东境内6.4万km2冲积平原区表层土壤区域地球化学调查数据为基础,提出了区内进行评估的参评指标体系,确定了各评估指标层的权重,进而对区内土地质量进行了系统的地球化学评估。研究发现,由于区内土壤物源的相对单一性,在不同参评指标体系下,大部分评估单元的分等始终趋向一致,其中优良等级土地占全区的80%,两端分等土地往往面积较小且分散。评估分等的意义以反映土壤综合肥力和健康指标的高低为主,由于区内土壤环境质量超标比例极小,分等仅指示土壤环境质量的相对优劣。该评估成果可为土地资源的合理利用提供指导,并为今后区内开展的次级地球化学评估工作提供了基础和参照。
Based on the geochemical data of the surface soil obtained from the downstream basin of the Yellow River in Shandong, the authors used the regular land quality geochemical assessment methods, put forward the assessment va^e index system of the work area, determined the weights of all assessment index layers, and then completed the land quality geochemical assessment of the work area. Studies show that, as the soil source in the work area is relatively uniform, most of the assessment unit classifications always tend to be the same despite using different assessment index systems, up to 80% land of the whole region can be assigned to excellent grades, and lands of two-ends grades are often smaller and fragmented. The assessment classification can reflect the levels of the soil fertility and healthy elements and, due to the rareness of the soil that exceeds the environment quality standard, the classification simply indicates the relative merits of soil environmental quality. The assessment result can provide guidance for the rational utilization of land resources and provide the data basis and reference for the lower grade stage geochemical assessment within this region in the future.
出处
《物探与化探》
CAS
CSCD
2013年第4期743-748,共6页
Geophysical and Geochemical Exploration
基金
山东省与国土资源部合作项目(基[2005]011-06)
关键词
黄河下游
土地质量
综合肥力
地球化学评估
downstream basin of the Yellow River
land quality
fertility
geochemical assessment
