摘要
亚热带低山区是我国茶园的主要分布区域,微量元素对茶叶的品质具有十分重要的影响,研究其空间变异特性是实现低山茶园精确管理的基础。利用地统计学、主成分分析方法对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)蒙顶山茶园土壤四种微量元素的空间变异具有相似性。四种元素均为指数模型,步长间距为120 m时变程为206～1860m,铁、锰和锌均具有中等程度的空间相关性[C0/(C0+C)值在25.1%～49.6%之间],锰和铜在NE111o方向上具有相似的各向异性特征,铁和锌则具有各向同性的趋势。(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。
The subtropical hill region is the main area where the tea plantations are distributed in Chian, Trace elements are very important to tea quality, Study on the spatial variability of trace elements in tea plantation soils is the foundation of precision agriculture. With the original data as basis, the spatial variability of trace elements of montanic tea plantation soil in Mengshan is studied with the aid of principal component analysis and geostatistics model. The result showed： （1） The spatial variability of four trace elements（Fe, Mn, Zn, Cu） in tea plantation soils are similar. All of the theoretical model of trace elements are exponential model, the range of spatial correlation is 206- 1 860 m. The spatial correlation of Fe, Mn, Zn belong to medium levels [C0/（Co＋C）： 25.1%-49.6%], the spatial variability between Mn and Cu similar anisotropic characteristic in NE111^o, Fe and Zn trends to isotropy. （2） Principal component of comprehensive cartography describe the distribution rule of trace elements in general. Maps of Kriged estimates with principal component showed that the characters of trace elements distributed in a belt shape across the Mengshan mountain, which are in accordance with the result of geostatistic analysis. （3）The mainly influencing factors of tea plantation soil in Mengshan are soil condition and slope.
出处
《茶叶科学》
CAS
CSCD
北大核心
2008年第1期14-21,共8页
Journal of Tea Science
基金
国家自然科学基金(32230250)
四川省青年基金(06ZQ026-020)
四川省教育厅重点项目(2006A008)
四川省教育厅青年基金(2006B009)
四川农业大学科技创新基金(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
