江苏北部地区土壤全氮含量的时空变化  

Temporal and spatial variation of soil total nitrogen in typical areas of Northern Jiangsu

作　　者：马家桢 张忠启 Ma Jiazhen;Zhang Zhongqi(School of Geography,Geomatics&Planning,Jiangsu Normal University,Xuzhou 221116,Jiangsu,China)

机构地区：[1]江苏师范大学地理测绘与城乡规划学院,江苏徐州221116

出　　处：《江苏师范大学学报（自然科学版）》2021年第3期1-6,共6页Journal of Jiangsu Normal University：Natural Science Edition

基　　金：土壤与农业可持续发展国家重点实验室开放基金项目(Y20160008);江苏师范大学研究生科研与实践创新计划项目(2021XKT0058);江苏高校优势学科建设工程项目。

摘　　要：基于江苏北部(苏北)地区第二次土壤普查(1982年)的1091个土壤采样点数据和2008年的1085个土壤调查数据,采用地统计学与地理信息系统(GIS)相结合的方法,研究1982—2008年苏北地区土壤全氮含量的时空变异特征.研究结果表明:苏北地区1982年和2008年土壤全氮质量分数的均值分别为0.73g/kg和1.20g/kg,均低于全国土壤全氮含量平均水平,但后者较前者增加了64.4%.从空间上看,土壤全氮含量增幅在不同地区差异较大,苏北地区的中北部、东北部和西南部的局部地区增长幅度较大,而中部、西北部和南部的局部地区增长幅度较小.不同类型土壤全氮含量的增幅也不一致,其中紫色土的增幅最大,水稻土和砂姜黑土的增幅较小.苏北地区土壤全氮含量受成土母质、气候和化肥施用量等因素影响,具有较强的时空变异特征.未来区域科学施肥措施的制定需充分考虑不同区域的土壤全氮含量水平,以保障农业生产的可持续发展.Based on the data of 1091 soil sampling points from the second soil survey(1982)and 1085 soil survey data in 2008,the temporal and spatial variation characteristics of soil total nitrogen in Northern Jiangsu from 1982 to 2008 were studied using the method of geostatistics and geographic information system(GIS).The results showed that the average values of soil total nitrogen in Northern Jiangsu in 1982 and 2008 were 0.73 g/kg and 1.20 g/kg respectively,which were lower than the national average level of soil total nitrogen.But the latter increased by 64.4%compared with the former.Spatially,the increase of soil total nitrogen varies greatly in different regions.In Northern Jiangsu,the increase ranges are larger in some areas of central north,northeast and southwest,while the increase ranges are smaller in some areas of central,northwest and south.The increases of total nitrogen content in different soil types are also inconsistent,in which the increase of purple soil is the largest,and the increases in paddy soil and mortar black soil are small.Therefore,soil total nitrogen in Northern Jiangsu has strong temporal and spatial variation characteristics affected by soil parent material,climate and fertilizer application rate.The formulation of regional scientific fertilization measures in the future should fully consider the soil total nitrogen content level in different regions to ensure the sustainable development of agricultural production.

关 键 词：土壤全氮 时空变异 苏北地区 

分 类 号：S153.4[农业科学—土壤学]