基于密集采样点的局地农田土壤养分空间变异特征分析  

Analysis of the spatial variability characteristics of local agricultural soil nutrients based on dense sampling sites

作　　者：沈小龙 蒋浩永 郁林成 陈叶霞 SHEN Xiaolong;JIANG Haoyong;YU Lincheng;CHEN Yexia(School of Resources and Environmental Engineering,Anhui University,Hefei Anhui 230601,China;School of Geographic Information and Tourism,Chuzhou University,Chuzhou Anhui 239000,China;Anhui Provincial Key Laboratory of Real-Scene Simulation and Environmental Display,Chuzhou University,Chuzhou Anhui 239000,China;Mingguang Agricultural Technology Extension Center,Chuzhou Anhui 239000,China)

机构地区：[1]安徽大学资源与环境工程学院,安徽合肥230601 [2]滁州学院地理信息与旅游学院,安徽滁州239000 [3]滁州学院实景地理环境安徽省重点实验室,安徽滁州239000 [4]明光市农业技术推广中心,安徽滁州239000

出　　处：《延边大学农学学报》2025年第1期40-45,共6页Journal of Agricultural Science Yanbian University

基　　金：安徽省教育厅科研计划重点项目(2024AH051396)。

摘　　要：随着过度耕种以及化肥的使用,土壤养分的空间分布受到了影响,为了探究土壤养分的空间分布和变异特征,该研究从局地农田耕地中采取2450个土壤采样数据,运用半方差函数、克里金插值等分析方法研究局地农田土壤4种养分和酸碱度的空间分布及影响因素。结果表明:涧溪镇农田土壤中有机质(soil organic matter,SOM)、有效磷(available phosphorus,AP)、速效钾(available potassium,AK)、全氮(total nitrogen,TN)的平均含量和酸碱度(pH值)的平均值分别是21.23g/kg、29.61mg/kg、113.97mg/kg、1.13g/kg和6.10,pH值为低变异程度,其他均为中等变异程度。5种指标的空间变异特征均为指数模型,随着距离超过变程,相关性趋于平稳。总体而言,研究区土壤养分含量中等偏低。根据地理探测器分析土壤养分影响因素,高度是最大影响因素,其中高度和地表温度交互作用明显可以增强土壤养分空间变异。With the cultivation and use of fertilizers,the spatial distribution of soil nutrients will be affected.In order to explore the spatial distribution and variability characteristics of soil nutrients,2450 soil sampling data were collected from local farmland,and analysis methods such as semi-variance function analysis and Kriging interpolation were used to study the spatial distribution and influencing factors of four nutrients and acidity in local farmland soil.The results showed that the average content of soil organic matter(SOM),available phosphorus(AP),available potassium(AK),total nitrogen(TN),and pH in the farmland soil of Jianxi Town were 21.23g/kg,29.61mg/kg,113.97mg/kg,1.13g/kg,and 6.10,respectively.pH has a low variability,while others have moderate variability.The spatial variation characteristics of the five indicators are all exponential models,and as the distance exceeds the range,the correlation tends to stabilize.Overall,the soil nutrient content in the study area is moderate to low.According to the analysis of soil nutrient influencing factors by geographic detectors,height is the biggest influencing factor,and the interaction between height and surface temperature can significantly enhance the spatial variation of soil nutrients.

关 键 词：密集采样 土壤养分 空间变异 克里金插值 

分 类 号：S159[农业科学—土壤学]