Vladimir L. Gavrikov, Ruslan A. Sharafutdinov, Alexey I. Fertikov, Eugene A. Vaganov
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引用次数: 0
摘要
了解元素在树木木质部中以特定方式分布的原因是树木化学领域的一项重大挑战。本研究探讨了木质部中的金属元素因离子半径和电离电位等物理特性的差异而相互作用的假设。研究树种是 20 世纪 70 年代初在西伯利亚东部建立的匀龄林中的苏格兰松。研究人员从树木的南北两侧提取了增量岩心,并使用 X 射线荧光多重扫描仪进行了扫描。在 X 射线扫描的帮助下,对以下元素进行了分析:铝(Al)、钾(K)、钙(Ca)、钛(Ti)、锰(Mn)、铁(Fe)、铜(Cu)、锶(Sr)和锌(Zn)。各元素的扫描数据按生长年份分为早期木材数据和晚期木材数据。对以下比率进行了分析:Ca/Sr、Fe/Ca、Fe/Sr、Al/Cu、Al/Zn、Ti/Mn 和 Mn/K。其中,在树年轮中具有一致模式的比率或多或少显示出一种可靠的关系:一种元素(相对于另一种元素)的离子半径越大、电离电位越低,其下降幅度就越大。推测这可能是由于在有机分子中缺乏容纳中心的情况下,离子半径较小、电离电位较高的离子具有优势。应采用实验方法来阐明其中的关系。
Properties of ions may explain elemental stoichiometry in late- and early-wood: a case study in Scots pine tree rings
Understanding why elements are distributed in tree xylem in a particular way is a significant challenge in dendrochemistry. This study explored a hypothesis that metal elements in the xylem interact due to differences in physical properties such as ionic radius and ionization potential. Scots pine in an even-aged stand established during the early 1970s in eastern Siberia was the study species. Increment cores were taken from the north and south sides of trees and scanned with an X-ray fluorescent multi scanner. With the help of X-ray scanning, the following elements were analyzed: aluminum (Al), potassium (K), calcium (Ca), titanium (Ti), manganese (Mn), iron (Fe), copper (Cu), strontium (Sr) and zinc (Zn). Scanning data on the elements were split into early-wood and late-wood data for each year of growth. The following ratios were analyzed: Ca/Sr, Fe/Ca, Fe/Sr, Al/Cu, Al/Zn, Ti/Mn, and Mn/K. Among these, ones having a consistent pattern across tree rings, the ratios show a more or less dependable relationship: that an element shows a larger decrease (relative another element) that has a larger ionic radius and lower ionization potential. Hypothetically, this may be due to the advantage of an ion with smaller ionic radius and higher ionization potential under a deficit of accommodation centers in organic molecules. An experiment approach should be applied to clarify the relationships.
期刊介绍:
The Journal of Forestry Research (JFR), founded in 1990, is a peer-reviewed quarterly journal in English. JFR has rapidly emerged as an international journal published by Northeast Forestry University and Ecological Society of China in collaboration with Springer Verlag. The journal publishes scientific articles related to forestry for a broad range of international scientists, forest managers and practitioners.The scope of the journal covers the following five thematic categories and 20 subjects:
Basic Science of Forestry,
Forest biometrics,
Forest soils,
Forest hydrology,
Tree physiology,
Forest biomass, carbon, and bioenergy,
Forest biotechnology and molecular biology,
Forest Ecology,
Forest ecology,
Forest ecological services,
Restoration ecology,
Forest adaptation to climate change,
Wildlife ecology and management,
Silviculture and Forest Management,
Forest genetics and tree breeding,
Silviculture,
Forest RS, GIS, and modeling,
Forest management,
Forest Protection,
Forest entomology and pathology,
Forest fire,
Forest resources conservation,
Forest health monitoring and assessment,
Wood Science and Technology,
Wood Science and Technology.