Reasonable sampling scale of macropore based on geostatistic theory

Abstract

Spatial scale of soil character is forefront in soil-scientific research, and the analysis of macropore reasonable sampling size becomes significant in studyinig on soil spatial variability. From the micro-structure of the soil, using digital image preparation and analysis technology, this paper described the soil macropore with rations, discussed the spatial structure of soil macropore on both the vertical and horizontal directions by geologic geostatistic theory , analysed by the base value of variation function C0, structure variance C, variable function, model test parameter I and model accuracy rate of change k and so on. The results showed that the reasonable sampling interval of vertical depth was 20 mm, and the economic reasonable sampling diameter on horizontal was about 90 ∼ 100 mm. The production has very important significance to ensuring the scientific of the soil macropore research, saving study time, and reducing the human and financial resources in the trial. © 2009 Springer Science+Business Media, LLC.