Research on Influencing Factors of Spatial Variation of Soil Nutrients

作者：Tingting MENG

摘要：Based on previous studies,the research methods and influencing factors of spatial variation of soil nutrients are summarized.It is concluded that the spatial variation of soil nutrients is studied generally by geostatistics methods,and the spatial distribution of nutrients is visually observed by using Kriging interpolation method.The influencing factors mainly include topography,sampling method,sampling spacing,sampling density and sampling scale.The influence of random sampling and grid sampling on interpolation is analyzed based on the specific conditions of the actual study area.The influence of sampling density and topography on the spatial variation of soil nutrients cannot be ignored,especially on available nutrients.When samples are collected in a large area(under a small and medium scale),the spatial variation of soil nutrients is large,and they have strong spatial autocorrelation;in a small area(namely under a large scale),the spatial variability of soil nutrients is small,and they have obvious spatial autocorrelation.This study can provide intuitive and convenient reference materials for the following researchers.

發文機構：Shaanxi Provincial Land Engineering Construction Group Co. Institute of Land Engineering and Technology Key Laboratory of Degraded and Unused Land Consolidation Engineering Shaanxi Provincial Land Consolidation Engineering Technology Research Center

關鍵詞：SoilnutrientsSpatialvariationGEOSTATISTICSSamplingmethodSamplingscaleSamplingdensity

分類號： S15[農業科學—土壤學]