陆良植烟土壤有效态微量元素空间分布研究

Study on Spatial Distribution of Available Microelement in Soil in Luliang Tobacco Farming Area

为了对陆良烟区土壤微量元素进行科学有效地分区管理及烤烟合理施肥提供依据,利用地统计学方法研究了陆良县基本烟田耕层土壤(0～20cm)中有效态微量元素的空间结构及其分布特征。结果表明:陆良县植烟土壤微量元素均表现为各向异性分布,6种有效态微量元素均表现为中等的空间相关,其空间变异受由结构性因素和随机性因素共同影响;利用普通克里格插值法绘制了微量元素空间分布图,结果显示,陆良县植烟土壤有效硼处于中等水平,有效锌含量中等,有效铜、有效铁和有效锰含量十分丰富,土壤有效钼极度缺乏。

In order to investigate the spatial distribution of soil available micronutrients and its influencing factors, and to provide a theory basis for management of micronutrients and fertilizing reasonably on tobacco, spatial distributions and patterns of 6 available microelements in soil in Luliang were analyzed based on geostatistics methods. The results indicated that： anisotropic structure of available microelements in tobacco soil varied evidently, and was auto-correlated to a moderate degree, spatial variability of 6 available microelements were caused by structural factors and random factors. Spatial distribution maps showed that, available B and available Zn were moderate in soil in Luliang County, available Cu, available Fe and available Mn were extremely high in the whole extension, available Mo was widely deficient in soil.