山东国土资源2026，Vol.42Issue(4)：34-42,9.DOI:10.12128/j.issn.1672-6979.2026.04.005
上海某项目区土壤养分采样密度优化研究
Study on Optimizing Soil Nutrient Sampling Density in a Project Area in Shanghai City
摘要
Abstract
In order to balance the accuracy and cost of soil surveys in territorial comprehensive remediation and optimizing the sampling density of soil nutrient indicators for base surveys,taking three natural villa-ges(773.8 hm2)in a certain project area in Shanghai as the study area,263 sampling points have been layed,and 5 indicators(including organic matter)have been measured.Based on geostatistics and GIS spatial analysis,spatial variation characteristics of soil attributes under different sampling densities(10～40 points/km2)have been analyzed,and the sampling plan has been optimized through cross validation.The variation coefficients for each indicator range from 33.66%to 76.58%,with organic matter and total nitrogen primarily exhibiting structural variation(nugget effect<10%),while effective phosphorus and other indicators are significantly influenced by anthropogenic factors(nugget effect is 10.06%～23.34%).It is indicated that at a sampling density of 20 points/km2,the spatial distribution patterns of key nutrient indicators are effectively maintained,with the spacing between sampling points closely matching the range heights of each indicator.This approach can reduce the sampling volume by 50%compared to 40 points/km2.Therefore,for areas with homogeneous parent material and flat terrain,a density of 20 points/km2 can serve as a recommended option that balances accuracy and efficiency.This study will pro-vide practical references for optimizing soil nutrient indicator sampling plans in territorial comprehensive remediation base surveys at the township scale in the Yangtze River Delta region.关键词
国土综合整治/采样密度/空间变异/地统计学/上海市Key words
Land comprehensive regulation/sampling density/spatial variation/geostatistics/Shanghai city分类
农业科技引用本文复制引用
许锋,董楠,袁平凡..上海某项目区土壤养分采样密度优化研究[J].山东国土资源,2026,42(4):34-42,9.基金项目
上海市地矿工程勘察(集团)有限公司2023年度科研项目,国土综合整治项目基底调查土壤采样密度研究(Dkjt202307) （集团）
上海市地质学会2023年开放课题,基于国土综合整治生态监测信息系统研究与设计(Dzxh202304) （Dzxh202304）
