干旱地区农业研究2012，Vol.30Issue(1)：36-42,7.
黄土丘陵沟壑区土壤微量元素空间变异特征及其影响因素
Spatial variability and controlling factors of soil trace elements in hilly and gully area of the Loess Plateau
摘要
Abstract
With Ansai County as the study area, geostatistics combined with geographical information system (GIS) technique were applied to analyze the spatial variability and controlling factors of soil available Fe, Mn, Cu and Zn in hilly and gully area of the Loess Plateau. The result indicated that: the variation coefficient of these soil trace elements was between 14.81% and 22.49% , and every trace element had medium variability; The nugget effect value was be-tween 11.76 % and 46.94 % , and the spatial correlation of Zn was highly dependent, while Fe, Mn and Cu were moder-ately dependent; The spatial distribution of the content of each trace element showed a diminishing trend from north and south to the central area. The soil type remarkably influenced the contents of Mn and Cu, indicating that their contents in gray-cinnamon soils were higher than those of loessial soils. The relative elevation ( Hr) had highly significant negative correlation with Fe, Mn and Zn; Gradient (β) had significant or highly significant negative correlation with Mn and Cu; Roughness of terrain( QFD) had significant or highly significant negative correlation with Fe and Cu. Organic matter, available nitrogen, available phosphorus and available potassium had significant or highly significant negative correlation with Cu and highly significant positive correlation with Zn; Available potassium had highly significant positive correlation with Fe and Mn; pH had significant or highly significant negative correlation with each soil trace element. This study provided basis and reference for reasonable fertilization and soil environmental protection in this area.关键词
土壤微量元素/空间变异/地统计学/Kriging插值Key words
soil trace element/ spatial variability/ geostatistics/ Kriging interpolation分类
农业科技引用本文复制引用
宋丰骥,常庆瑞,钟德燕,方睿红..黄土丘陵沟壑区土壤微量元素空间变异特征及其影响因素[J].干旱地区农业研究,2012,30(1):36-42,7.基金项目
国家自然科学基金资助项目(30872073) （30872073）
陕西省自然科学基金资助项目(SJ08D08) （SJ08D08）
