山东典型植烟土壤微量元素有效态含量研究

为摸清山东典型植烟区土壤微量元素有效态含量分布情况,采集和分析了临朐、蒙阴、诸城、费县、五莲、莒县6个主要植烟县的烟田耕层和剖面土样。结果表明:①耕层土壤有效Fe和Mn含量丰富,有效Cu含量适中,有效Zn含量较低。②石灰性砂页岩发育的土壤中微量元素有效态含量相对较低。③有效态Fe、Mn和Zn主要为表层富集型,有效Cu垂直分布相对均匀。④土壤有效态Fe、Mn、Cu和Zn含量随pH升高而降低,随有机质增加而增加;pH是影响有效态Fe和Mn的重要因素,而有机质是影响有效态Cu和Zn的重要因素。

Contents of Available Microelements in Typical Tobacco-planting Soils of Shandong Province

In order to study the content characteristics of available microelements in typical tobacco-planting soils of Shandong Province, soil samples were collected from 6 main tobacco-planting regions, i.e., Linqu, Mengyin, Zhucheng, Feixian, Wulian and Juxian and the available contents of Fe, Mn, Cu and Zn in the samples were analyzed. The results showed that: 1) the contents of available Fe and Mn in the plough horizon were plentiful, while those of Cu and Zn were moderate and insufficient respectively; 2) available Fe, Mn and Zn were obviously accumulated in plough horizon while available Cu distributed homogeneously in the profile; 3) available Fe, Mn, Cu and Zn in soils derived from calcareous purple sandstone were significantly lower than from other parent materials; 4) significantly negative correlations were observed between the contents of available Fe and Mn and soil pH while a significantly positive correlation found between soil available Cu, Zn and soil organic matter.