摘要
【目的】正确评估土壤pH值的变化状况,掌握土壤pH值空间分布规律,合理开发利用土壤资源。【方法】以黄河三角洲典型县域垦利区为研究区,通过野外调查采样,利用GIS技术研究了2007—2016年土壤pH值时空变化情况。【结果】垦利区绝大部分区域土壤碱化程度明显增加,增加的面积占研究区总面积的87.48%。土壤pH值降低的区域仅占研究区总面积的0.14%,主要位于郝家镇。pH值未发生变化的区域共占12.38%,主要分布在垦利区的西南以及东南部。【结论】各个乡镇土壤pH变化的原因存在分异,水文地质条件、土地利用方式、作物类型、土地改良和利用等因素与土壤碱化动态有着密切的关系。
【Objective】Correctly assessing the changes of soil pH and grasping the law of the spatial distribution of soil pH are the basis and prerequisite for the rational development and utilization of soil resources.【Method】Kenli District,a typical county in the Yellow River Delta was selected as research area.The field spatial and temporal changes of soil pH from 2007 to 2016 were studied using GIS technology through field survey sampling.【Result】The results showed that the degree of soil alkalization in most areas of Kenli District increased significantly,accounting for 87.48%of the total area of the study area.The area where the pH of the soil decreased was only 0.14%of the total study area,and it was located in Haojia town.The area where the pH value did not change accounted for 12.38%,mainly distributed in the southwest and southeast of the study area.The degree of soil alkalization in most study area increased significantly,accounting for 87.48%,of which 46.13%of the soil changed from alkaline soil to strongly alkaline soil.【Conclusion】The reasons for the change of soil alkalization degree in different townships are diverse.Factors such as hydrogeological conditions,land use patterns,vegetation cover types,land improvement and utilization are closely related to the dynamics of soil alkalization.
作者
段梦琦
丁效东
李士美
张晓光
DUAN Mengqi;DING Xiaodong;LI Shimei;ZHANG Xiaoguang(Department of Resources and Environment,Qingdao Agricultural University,Qingdao 266109,China;State Key Laboratory of Soil and Sustainable Agriculture,Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China;College of Landscape Architecture and Forestry,Qingdao Agricultural University,Qingdao 266109,China;Shandong Provincial Key Laboratory of Eco⁃Environmental Science for Yellow River Delta,Binzhou University,Binzhou 256603,China)
出处
《灌溉排水学报》
CSCD
北大核心
2020年第S02期9-13,共5页
Journal of Irrigation and Drainage
基金
国家自然科学基金项目(41601211)
山东省黄河三角洲生态环境重点实验室开放基金项目(2018KFJJ02)
山东省重点研发计划项目(2017CXGC0303)
青岛农业大学人才基金项目(1114344)
关键词
黄河三角洲
土壤PH
时空变化
土壤碱化
空间分布
Yellow River delta
soil pH
temporal and spatial changes
soil alkalization
spatial distribution
