黑龙江松嫩平原土壤有效态中微量元素的空间分布特征

运用地统计学结合GIS技术研究了黑龙江松嫩平原农业区土壤中微量元素的空间分布特征,通过对数转化、域法处理和Box-Cox转化3种数据处理方法对土壤有效钙、有效镁、有效硼、有效铜和有效锌进行了正态分布性检验。结果表明,有效钙原始数据很好的服从正态分布,Box-Cox转化成功地使有效镁、有效硼、有效铜、有效锌含量数据更好的服从正态分布。应用地统计学分析方法进行了半方差函数的计算和最适合模型的拟合,得出各元素最好的理论模型,并绘制了各养分元素的空间分布图。半方差分析的结果显示,各元素具有中等空间相关性,并对造成现有空间分布特征的原因进行了分析。

Spatial Variability of Available Middle-elements and Microelements in Soil of Songnen Plain

Spatial distributions of soil middle-elements and microelements in Songnen Plain of Heilongjiang Province were investigated using geostatistics and geographic information system(GIS) techniques.With various processing methods of logarithmic transformation,excluding outliers and Box-Cox transformation,the available Ca,Mg,B,Cu,and Zn contents were evaluated with normal distribution.Box-Cox transformation was applied in order to achieve normality in the data sets of available Mg,B,Cu,and Zn and to reduce the effect of outliers.Geostatistical analyses were carried out,including calculation of experimental variograms and model fitting,and then the distribution patterns of these soil nutrients elements were plotted.Semivariogram analysis showed that these soil nutrient elements were moderately spatially dependent in a given range,and the reason for the distribution of the soil nutrients elements was explained.