| Analysis on spatial variability of soil nutrients at county level——A case study in Pucheng County |
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| DOI：10.7606/j.issn.1000-7601.2012.01.06 |
| Key Words: geostatistics soil nutrient spatial variability |
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| Abstract: |
| 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. |
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