摘要
利用地统计学、主成分分析方法对不同尺度下四川蒙顶山茶园土壤微量元素空间变异性、影响因素及多元素综合制图进行了研究。结果表明:①两个尺度下土壤微量元素的空间相关性存在差异,同时其空间变异方向具有相似性,Mn和Cu在山脉走向垂直方向变异较大,Fe和Zn在水平方向变异较大且具有各向同性发展的趋势。普通Kriging插值结果说明微量元素含量从东北至西南呈明显的带状分布,垂直方向上随海拔升高而变化。②主成分综合制图较好地反映了微量元素分布的总体规律。两种主成分均具有较明确的物理意义。其插值图体现了微量元素特性沿坡面方向的带状变化特点,与半方差函数分析的结果完全吻合。③土壤环境条件对蒙顶山茶园土壤微量元素影响较大,而坡度是影响土壤微量元素空间分布形态的主要地形因素。
Based on the data available, spatial variability of trace elements of the tea plantation soil on the Mengdingshan Mountain was studied by means of principal component analysis and geostatistics. Results indicated （1） trace elements varied, but showed a similar trend in spatial variability on two different scales; and ordinary Kriging revealed that trace element contents were distributed along a strip from northeast to southwest; 2） principal-component-based comprehensive mapping reflected pretty well a general rule of the distribution of trace elements; the Kriging maps embodied the characters of trace elements distribution along the slope of the mountain, which was in accordance with the result of geostatistic analysis; and 3） soil environment conditions were the main factor affecting spatial distribution of trace elements in the tea plantation soil on the Mengdingshan Mountain and slope the main topographic one.
出处
《土壤》
CAS
CSCD
北大核心
2008年第2期257-263,共7页
Soils
基金
国家自然科学基金项目(32230250)
四川省科技厅应用基础项目(03JY029-0301)
四川省教育厅重点项目(2003A022)
四川农业大学科技创新基金项目(2005)
关键词
空间变异
地统计学
微量元素
茶园土壤
Spatial variability, Geostatistics, Trace elements, Tea fields
