扬州市江都区耕地土壤有机质35年变化特征及其影响因素分析  

Variation characteristics of soil organic matter and its influencing factors in 35 years in Jiangdu district of Yangzhou city

作　　者：石光辉[1] 毛伟 曾洪玉 李文西 陈明 高晖 徐迅燕 唐宝国 SHI Guanghui;MAO Wei;ZENG Hongyu;LI Wenxi;CHEN Ming;GAO Hui;XU Xunyan;TANG Baoguo(College of Resources and Environmental Engineering,Yangzhou Vocational University,Yangzhou 225012,China;Yangzhou Cultivated Land Quality Protection Station,Yangzhou 22510l,China;Jiangdu District Agricultural Technology Extension Center of Yangzhou City,Yangzhou 225219,China)

机构地区：[1]扬州市职业大学资源与环境工程学院,江苏扬州225012 [2]扬州市耕地质量保护站,江苏扬州225101 [3]扬州市江都区农业技术推广中心,江苏扬州225219

出　　处：《扬州大学学报（农业与生命科学版）》2022年第6期44-50,共7页Journal of Yangzhou University：Agricultural and Life Science Edition

基　　金：国家重点研发计划项目(2016YFD0200301);扬州市校合作专项(YZ2019136)。

摘　　要：以扬州市江都区1984年土壤普查和2019年测土配方施肥采集的耕地土壤有机质含量数据为基础,分析耕地土壤有机质含量变化特征及其影响因素。结果表明:1984和2019年江都区耕地土壤有机质含量变化区间依次为5.45~48.72和12.92~51.16 g·kg^(-1),均值分别为18.04和30.25 g·kg^(-1);1984年耕地土壤有机质含量Ⅲ、Ⅳ级水平占比85.98%,2019年Ⅱ、Ⅲ级水平占比91.36%;2019年江都区耕地土壤有机质含量显著高于1984年,增加量集中在20 g·kg^(-1)的范围内,吴桥镇、宜陵镇和仙女镇等位于江都区南部区域增加比例相对较高;母质为湖相沉积物的土壤有机质含量显著高于其他类型成土母质的土壤有机质含量,轻黏土有机质含量显著高于其他质地的土壤有机质含量,水田土壤有机质含量显著高于旱地土壤有机质含量。综上,2019年江都区耕地土壤有机质含量比1984年增加68.33%,土壤有机质含量呈区域均匀化方向发展;成土母质、土壤质地和土地利用方式显著影响耕地有机质含量变化。Based on the data of soil organic matter collected in 1984 and 2019 in Jiangdu district of Yangzhou city,the change characteristics and influencing factors of soil organic matter content of cultivated land were analyzed.Results showed that the change range of soil organic matter content in Jiangdu district of Yangzhou city in 1984and 2019 was 5.45-48.72 and 12.92-51.16g·kg^(-1),respectively,with the average value of 18.04and 30.25g·kg^(-1).In 1984,85.98%of the cultivated land was at gradeⅢandⅣ,while 91.36%of the cultivated land was at gradeⅡandⅢin 2019.The soil organic matter content of cultivated land in 2019 was significantly higher than that in 1984,and the increase was concentrated in the range of 20g·kg^(-1).Wuqiao town,Yiling town and Xiannu town located in the south of Jiangdu district had a relatively high proportion of increase.The content of organic matter in soil with lacustrine sediment as parent material was significantly higher than that in other types of soil forming parent material,the content of organic matter in light clay soil was significantly higher than that in soil with other textures,and the content of organic matter in paddy soil was significantly higher than that in upland soil.In a word,the content of soil organic matter of cultivated land in Jiangdu district in 2019 is 68.33%higher than that in 1984,and the content of soil organic matter is developing towards regional homogenization.Soil parent material,soil texture and land use significantly affected the change of organic matter content in cultivated land.

关 键 词：耕地 沿江地区 有机质 时空变化 

分 类 号：S158.2[农业科学—土壤学]