| 秦占飞,常庆瑞.县域土壤养分空间变异分析——以蒲城县为例[J].干旱地区农业研究,2012,30(1):30~35 |
| 县域土壤养分空间变异分析——以蒲城县为例 |
| Analysis on spatial variability of soil nutrients at county level——A case study in Pucheng County |
| |
| DOI：10.7606/j.issn.1000-7601.2012.01.06 |
| 中文关键词: 地统计学 土壤养分 空间变异 |
| 英文关键词:geostatistics soil nutrient spatial variability |
| 基金项目:国家自然科学基金(30872073) |
|
| 摘要点击次数: 421 |
| 全文下载次数: 382 |
| 中文摘要: |
| 借助GIS和地统计学方法对蒲城县土壤有机质、碱解氮、有效磷和速效钾4种土壤养分的空间变异特征进行了分析。传统统计分析结果表明：4种土壤养分的变异系数在21%～80%之间，均属于中等变异性。地统计学半方差分析结果显示：碱解氮、有效磷和速效钾的基底效应介于25%～75%，具有中等空间相关性；有机质的基底效应为78%，空间相关性较弱。最后采用普通克里格插值方法，输出土壤养分空间分布图，据此分析土壤养分空间分布特征。 |
| 英文摘要: |
| GIS and geostatistical analysis method was used to analyze the spatial variability of four soil nutrients including organic matter, available nitrogen, available phosphorus and available potassium in Pucheng County. Traditional statistical analysis showed that variation coefficients of four kinds of soil nutrients ranged from 21%～80% and were medium in variation intensity. While the result of semi-variance analysis with geostatistics showed that Nugget/Sill of soil available N, P and K ranged from 25%～75% and presented moderate spatial dependence; and Nugget/Sill of soil OM was 78%, and presented weak spatial dependence. A spatial distribution map of soil nutrients was exported by adopting Ordinary Kriging Model interpolation, and the characteristics of the spatial distribution of soil nutrients were then analyzed. |
| 查看全文 查看/发表评论 下载PDF阅读器 |