黑龙江省松嫩平原南部土壤重金属元素铅的空间变异特征研究

Investigation on Spatial Variability of Pb in Southern Songnen Plain in Heilongjiang Province

利用地统计学,结合GIS研究黑龙江省松嫩平原南部重金属Pb在耕作层(0～20 cm)和亚耕作层(20～40 cm)的空间分布特征。结果表明耕作层和亚耕作层分别经过Box-Cox变换和Log变换后服从正态分布;通过半方差函数分析,发现存在块金效应,且耕作层和亚耕作层均为中等强度的空间自相关性;用普通克里格法进行插值,得到耕作层和亚耕作层的空间等值线图,充分了解空间变异性规律,并可进一步用于精确农业和农业污染源的预测和控制。

This paper adopts geostatistical method and GIS to study the spatial distribution of heavy metals Pb in the arable layer（0 -20cm） and sub - plow layer（20 -40cm） in southern Songnen Plain in Heilongjiang Province. The results show that the plow layer and sub - plow layer undergone Box - Cox transformation and Log transformation and conform to normal distribution. The nugget effect was found by semi - variance function analysis and the arable layer and sub - plow layer are in moderate spatial auto - correlation. With ordinary interpolation, the spatial contour map of the two layers was concluded. This paper provides guid- ance for further research in spatial variability regulation and reference to precision agriculture as well as prediction and control of pollution.