Analysis of field-scale spatial correlations and variations of soil nutrients using geostatistics

Environmental Monitoring and Assessment
Ruimin LiuZhenyao Shen

Abstract

Spatial correlations and soil nutrient variations are important for soil nutrient management. They help to reduce the negative impacts of agricultural nonpoint source pollution. Based on the sampled available nitrogen (AN), available phosphorus (AP), and available potassium (AK), soil nutrient data from 2010, the spatial correlation, was analyzed, and the probabilities of the nutrient's abundance or deficiency were discussed. This paper presents a statistical approach to spatial analysis, the spatial correlation analysis (SCA), which was originally developed for describing heterogeneity in the presence of correlated variation and based on ordinary kriging (OK) results. Indicator kriging (IK) was used to assess the susceptibility of excess of soil nutrients based on crop needs. The kriged results showed there was a distinct spatial variability in the concentration of all three soil nutrients. High concentrations of these three soil nutrients were found near Anzhou. As the distance from the center of town increased, the concentration of the soil nutrients gradually decreased. Spatially, the relationship between AN and AP was negative, and the relationship between AP and AK was not clear. The IK results showed that there were few ...Continue Reading

References

Jul 14, 2007·The Science of the Total Environment·Jin-Jing LeeChen-Wuing Liu
Aug 16, 2008·Science·Robert J Diaz, Rutger Rosenberg
Feb 6, 2009·Environmental Research·Ryan W AllenSara D Adar
Mar 12, 2011·Environmental Monitoring and Assessment·Q D LamN Fohrer
Mar 31, 2012·Journal of Environmental Management·Subhasis GiriSean A Woznicki
Oct 8, 2013·The Science of the Total Environment·Ruimin LiuZhenyao Shen
May 1, 2008·Water, Air, and Soil Pollution·C Y ChenC L Folt

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