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| 古今黄河三角洲交接带耕地盐渍化空间变异及其驱动因素 |
| Spatial variation and driving factors of cultivated land salinization in the transition zone of the ancient and modern Yellow River Delta |
| 投稿时间：2024-05-19 |
| DOI：10.13254/j.jare.2024.0333 |
| 中文关键词: 土壤盐分 三维空间 变异特征 驱动因素 |
| 英文关键词: soil salinity three-dimensional space variation characteristic driving factor |
| 基金项目:山东省自然科学基金项目（ZR2021MD018） |
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| 中文摘要: |
| 为全方位分析耕地土体盐分空间变异及其驱动因素，本研究以古今黄河三角洲交接带——东营市利津县为研究区，基于原位电导率建模获取耕地样点土层盐分信息，基于GIS、GMS软件空间建模技术，从二维、三维视角分析耕地土体盐渍化的空间变异特征，并采用指数法定量评估耕地土壤盐渍化程度，基于地理探测方法分析春季盐渍化的主要驱动因子。结果表明：研究区春季耕地表层土壤含盐量均值为4.24 g·kg-1，中位数为2.69 g·kg-1；pH均值为8.18，中位数为8.22，整体呈中度盐渍化。二维空间上，研究区盐渍化空间异质性显著，从南向北（从内陆向近海）各层土壤含盐量均呈逐渐升高趋势。三维空间上，耕地土体盐分整体表现出“表聚型”分布特征，局部有底聚、两端集聚类型。研究区盐渍化最严重区域主要位于北部的汀罗镇，受盐渍灾害影响最小的乡镇（街道）是研究区南部且靠近黄河的凤凰城街道。研究表明，土壤亚表层含盐量是研究区耕地土壤盐渍化的主要驱动因子，并通过与其他因素协同作用，对研究区春季耕地土壤含盐量空间分布产生重要影响。 |
| 英文摘要: |
| In order to comprehensively analyze the spatial variation of salinity in cultivated land soil and its driving factors, this study took Lijin County, Dongying City, the transition zone of the ancient and modern Yellow River Delta, as the research area. Based on in-situ conductivity modeling, the soil salinity information of cultivated land survey sample points was obtained. Based on GIS and GMS spatial modeling technology, the spatial variation characteristics of soil salinization in cultivated land was analyzed from two-dimensional and three-dimensional perspectives. The index method was used to quantitatively evaluate the degree of soil salinization in cultivated land. The main driving factors of spring salinization were analyzed based on geographical detection method. The results showed that the average salt content of the surface soil of cultivated land in the study area in spring was 4.24 g·kg-1, with a median of 2.69 g·kg-1; the average pH value was 8.18, with a median of 8.22, indicating moderate salinization overall. In two-dimensional space, the spatial heterogeneity of salinization in the study area was significant, and the soil salt content in each layer showed a gradually increasing trend from south to north（from inland to offshore）. In three-dimensional space, the overall salt content of cultivated land soil showed“surface aggregation”distribution characteristics, with local bottom aggregation and two-end aggregation types. The most serious area of salinization in the study area was mainly located in Tingluo Town in the north. The township（street）least affected by the salt disaster was Fenghuangcheng Street in the south of the study area and close to the Yellow River. The subsurface soil salt content is the main driving factor for soil salinization in cultivated land in the study area, and it has an important influence on the spatial distribution of soil salt content in spring through synergistic effect with other factors. |
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