Spatial Variability On Hydrology And Soil Physical And Chemical Parameters Of Black Soil Area At Slope

Soil is in the process of human existence in the nature most closely associated with human life of material resources, and human social life and production of the intimate relationship, its relationship with the sustainable development of human and nature and sustainable utilization of resources; Another black soil area at the main commodity grain production base in China, no matter in life or production, closely connected with the foundation of the national lifeblood. However the soil as a continuum of an inequality, both in the time scale and spatial scales were showed continuous variation characteristics, different time, the hydrological parameters of soil in different regions of the world and the physical and chemical parameters are characterized by a high degree of spatial heterogeneity, even at the same time, the same soil texture of different area, the hydrological parameters and the physical and chemical parameters of soil also has the obvious difference. So on black soil area at the slope to the main hydrological parameters and the physical and chemical parameters of the soil spatial variability analysis is of great significance.This study based on statistics and soil water dynamics, through2011-2012in heilongjiang province BeiAnShi hongxing farm test, the black soil area at the slope to the main hydrological parameters and spatial variation of physical and chemical parameters are analyzed, the soil hydrological parameters and the physical and chemical parameters of the single parameter model was established and half variance model respectively, and the single parameter model are verified, at the same time through the half variability analysis of variance model parameters, get the spatial distribution characteristic of soil physical and chemical parameters. In the process of study mainly by use of MATLAB language software for calculation, the measured experimental data the main content of this study are as follows:(1) first of all, on the spatial variability characteristics of soil hydrological parameters is studied, and the soil water characteristic curve, unsaturated soil water diffusivity and soil in the unsaturated hydraulic conductivity of the measured data, respectively in different slope positions (on the slope, slope, slope) randomly select a set of data, proper model fitting, and then according to the fitting results of model and the corresponding relation curves, the differences of soil hydrological parameters of different slope positions has carried on the brief.(2) the second according to different parameters of all the test data, respectively obtained the suitable soil water characteristic curve of the study area, unsaturated soil water diffusivity and soil unsaturated hydraulic conductivity of the single parameter model, and the resulting model is verified.(3) this study utilizes structure ratio, the variation coefficient and fractal dimension of three methods in black soil area farmland spatial variation features of soil physical and chemical parameters was analyzed, and the various parameters of half variance model, and the double logarithm linear regression graph, in a different view of spatial variation of soil physical and chemical parameters were analyzed at the same time, the differences and relations between each description method.(4) according to the soil physical and chemical parameters of the semivariance figure model have the necessary parameters of the spatial distribution characteristics, and has carried on the brief analysis, for the future of agricultural production and the theory basis of further research provides a more intuitive.