Study On Spatial Heterogeneity Of Soil Physical Properties And Soil Organic Matter In Different Pinus Koraiensis Fores

Soil moisture,bulk density,Capillary moisture capacity and Soil porosity are important soil physical factors.In the forest soil, spatial variation of these factors as the spatial variation of organic affecting roots of trees and the growth of forest.Research the spatial heterogeneity of these factors is very important on understanding the structure and variation of tree roots and growth of forest.Therefore,this experiment on the original forest,pine plantation,mixed pine birchⅠ(for the natural regeneration of Pinus), birch, and pine mixed forestⅡ(artificial pine plantation) used the classical statistical description and Geostatistics analysis of the spatial heterogeneity found:In all four forest types,physical properties of soil and organic matter exist 0＜CV＜1 in all soil layer,is moderate,in the distribution,organic is lognormal and the other factors are subject to normal distribution.According semivariogram.determine the physical properties of forest soil and organic matter hydrological model and the optimal parameter estimates,found that the theoretical variogram models are spherical model, exponential model and the Gaussian model.In all layers of four forest types,physical properties of soil and organic matter exists spatial correlation between observations in a certain range.That means structure of spatial variability exists. In addition to mixed pine birchⅡ,the partial base station of volumetric water content is 0, showed pure nugget effect,and the nugget of total porosity is 0 in the mixed pine birthⅠ.The physical properties and organic matter of other forest types have space heterogeneity in this layer. And all of these are basically moderate variability, spatial variability increases with the pitch.In the 10-20 cm soil layers,the nugget of capillary porosity is 0 in the pure forest.Other properties in various forest types are present in good spatial heterogeneity, Random variation and variation from the common work related to the spatial structure of form.In the 20-30cm of the soil,the factor variability of forest types is perplexed.In this layer, original Pinus Kerens's Forests total porosity,Birch and pine mixed forest pine plantationⅡand the organic matter has shown a pure nugget effect vary widely between samples,each sample is random,does not have the spatial correlation,the average of samples within the region that is the best estimate.There is a large proportion for nugget of capillary porosity in original forest and the birch and pine mixedⅠof this layer,it is a weak spatial autocorrelation,structural capillary porosity are poor relativity.There is a large proportion for nugget of capillary porosity in original forest and the birch and pine mixedⅠof this layer,it is a weak spatial autocorrelation, structural capillary porosity are poor relativity.In summary,this experiment in the study area,the physical properties of soil hydrology and soil organic matter in different soil management types Pinus Kerens's Forests showed different levels of spatial heterogeneity of heterogeneity conditions and control process,the nearly natural Pinus koraiensis Management theory provides a very important scientific reference.