Abstract

This paper presents the results of studying the ash content of twig and leaf debris from forest plants of primary midmountain tropical forests of Central Vietnam (Bidoup Núi Bà National Park) in order to identify and clarify the elements that enter the soil during their decomposition. The difference in the ratio of twig and leaf debris in mortmass samples collected in different landscape conditions is shown. At the same time, the influence of periodical and stagnant moisture conditions on the conduct of migratory soil processes is considered. The sampling points of the twig and leaf debris correspond to the locations of the soil catena within the structural ridge and its top, slope, and foothill. This allows us to relate the results obtained on the elemental composition of the twig and leaf debris to the geochemical migration of chemical elements in different geochemical landscape conditions, from automorphic to accumulative. An attempt has been made to establish the volumes of matter migrating from the mortmass into the soil together with the aqueous solution. Differences in the accumulation of ash elements in the twig and leaf debris depending on the position in different landscape conditions are revealed. The composition of elements entering the soil with twig and leaf debris and involved in geochemical migration is established, and the contribution of leaves and twig debris to the accumulation and migration of elements under different moisture conditions is evaluated. The dependence of geochemical migration processes on the position of the elementary geochemical landscape facies in the catena is pointed out, which manifests itself in a change not only in the total ash content of the twig and leaf debris, but also in the ratio of ash content of twig debris to that of leaf debris.

中文翻译：

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越南中部中山热带森林不同水分条件下死物质灰分含量及元素迁移动态

摘要

本文介绍了对越南中部原始中山热带森林（Bidoup Núi Bà 国家公园）森林植物的树枝和树叶碎片的灰分含量进行研究的结果，以识别和澄清分解过程中进入土壤的元素。显示了在不同景观条件下收集的死体样品中树枝和树叶碎片的比例差异。同时，考虑了周期性和停滞水分条件对土壤迁移过程进行的影响。树枝和树叶碎片的采样点对应于结构脊及其顶部、斜坡和山麓内土壤链的位置。这使我们能够将树枝和树叶碎片的元素组成结果与不同地球化学景观条件下（从自同构到累积）化学元素的地球化学迁移联系起来。已尝试确定从尸块与水溶液一起迁移到土壤中的物质的体积。揭示了根据不同景观条件下的位置，树枝和树叶碎片中灰分元素积累的差异。建立了随枝叶碎片进入土壤并参与地球化学迁移的元素组成，并评价了不同水分条件下叶枝碎片对元素积累和迁移的贡献。