Abstract:Semivariance analysis of Geostatistics was employed in the quantitative study of the spatial heterogeneity of root biomass in upper layer of soil under 14-year-old Fraxinus mandshurica plantation stand. The method used for the estimation of the root biomass was kriging interpolation of Geostatistics and definite integral. The results showed that (1) the semivariograms of fine root(<2mm), coarse root (≥2mm) and living root of Fraxinus mandshurica and total root biomass were best described by spherical model,...