【摘要】 土地是人类生存和社会经济稳定发展的重要基础资源，其中耕地是土地资源的重要组成部分，摸清耕地质量“家底”,全面掌握耕地质量现状，对于实现耕地土地资源的科学合理利用和绿色生态农业的可持续发展具有重要指导意义。本文基于1∶5万土地质量地球化学调查与评价，对获得的土壤有益营养元素和有毒有害元素含量进行了土地质量评价和级别划分，分析了土壤中元素分布特征及其控制因素。结果发现，研究区土壤主要由黄河冲洪积物形成，以农牧业为主，未受重金属污染，养分较丰富，一、二等优良土壤占比达88.85%,并且区内大部分土壤中的硒含量适量，建议富硒土地资源纳入政府土地利用规划，打造特色农业。更多还原

【Abstract】 Land is an important basic resource for human survival and stable social and economic development, and cultivated land is an integral part of land resources. Ascertaining the quality of cultivated land is of great significance for the scientific and rational utilization of cultivated land and the sustainable development of green ecological agriculture. Using the methods for 1∶50,000 geochemical survey and evaluation, this study conducted the quality evaluation and the classification of land in the study area based on the contents of beneficial nutrient elements and toxic and harmful elements in soils and analyzed the distribution and controlling factors of elements in soils. The results of this study are as follows. The soils in the study area consist mainly of alluvial-proluvial deposits from the Yellow River and are primarily used for agriculture and animal husbandry. The soils are not contaminated by heavy metals and are rich in nutrients, with the first-and second-grade excellent soils collectively accounting for 88.85%. Moreover, most soils in the study area have moderate selenium content. Therefore, it is recommended that selenium-rich land resources should be incorporated into the government land planning to develop agriculture with distinctive local features.更多还原