青海省黄土丘陵区主要林分土壤微量元素丰缺状况研究

发布时间：2018-04-20 10:46

本文选题：土壤微量元素 + 有效性评价　；参考：《干旱区资源与环境》2017年03期

【摘要】：以青海省黄土丘陵区为例,对比分析了土壤中有效态微量元素Cu、Fe、Mn、Zn、B在不同林地类型中的含量差异及其与土壤有机质、p H值之间的相关性。结果表明:1)土壤中有效态Fe和B含量极其丰富,达到高等水平;Cu含量比较丰富处于中等水平;Zn含量较为丰富,处于中低水平;Mn含量极其缺乏,处于极低或低水平。不同林型中,针阔混交林和灌木林的有效态微量元素含量较高。2)各微量元素有效性指数从大到小依次为Fe、Cu、B、Zn、Mn,Fe的有效性指数最高(7.613),Mn的有效性指数最小(0.722)且有效性指数均小于1。不同林分中微量元素有效性综合指数顺序为针阔混交林灌木林针叶林阔叶林。3)有机质与有效态Fe呈极显著正相关(p0.05),土壤p H与有效态Cu、Fe、Mn、Zn含量呈负相关关系。
[Abstract]:Taking the loess hilly region of Qinghai Province as an example, the content differences of the available trace element Cu _ (Fe) Fe _ (mn) Zn ~ (2 +) B in different forest land types and its correlation with soil organic matter P ~ (H) were compared and analyzed. The results showed that the available Fe and B contents in the soil were extremely rich, and the content of Cu and Cu in the soil reached the higher level. The content of Zn in the middle level was relatively rich, the content of mn in the middle level was extremely deficient, and the content was extremely low or low. In different forest types, the available trace element contents of coniferous and broad-leaved mixed forest and shrub forest were higher. 2) the available index of each trace element was the highest (0.722) and the availability index was less than 1. The comprehensive index order of trace element availability in different stands was: coniferous broadleaf forest. 3) Organic matter and available Fe were positively correlated with available Fe, and soil pH was negatively correlated with available CuFeFeMnN Zn content.
【作者单位】：陕西科技大学环境科学与工程学院;
【基金】：青海省林业厅项目(QHLY20150109)资助
【分类号】：S714

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