中文摘要：

以长江河口区为研究区域,选取与作物生长密切相关的理化性质作为土壤质量指标,根据作物效应和河口地区的实际情况,采用了抛物线型隶属度函数、生长指数型曲线隶属度函数（S型）和戒下型隶属度函数（Z型）三种方法确定各指标隶属度值,分别采用主成分分析法和灰色关联度法确定权重系数,应用综合指数法对土壤质量进行综合评价。结果表明研究区表土层浅薄,大部分地方土壤或地下水还含有较高盐分,土壤pH值普遍较高,土壤养分含量低且不均,比例失调。主成分分析法和灰色关联度法两种评价方法相关性很好,评价结果具有相当一致性。土壤质量综合评价分级图表明,这一地区土壤质量状况总体偏低,大多处于中下水平,且研究区不同部位土壤质量状况差异非常明显。该结果为河口地区土壤质量改良及科学管理提供参考。

英文摘要：

Soil quality was quantified using comprehensive indexing method in estuary area in Jiansu province.Soil physico-chemical properties which closely correlated with plant growth were selected.According to the crop effect and the area practical situation,the parabola-type and S-type and Z-type membership function were selected to determine the indices function values.Weight values were determined by principal component and grey association analysis method.The result showed the topsoil was shallow,and the soil or groundwater contained a high level of salinity,and the pH was generally high,and the soil nutrient content was low and disproportional.The principal component and grey association analysis were correlated very well,and the evaluated results were similar.Comprehensive evaluation diagram of soil quality showed the quality was low and the difference of soil quality was obvious in different position.The findings of the study were important references for soil quality improvement and scientific management.