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題 名 | 南華高山土壤的硼同位素、FTIR與XRD分析:探討臺灣全新世高山環境變遷與森林大火=Boron Isotope, FTIR, and XRD Analysis of High-Mountain Soils in Nanhua: Investigating Holocene Environmental Changes and Forest Fires in Taiwan |
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作 者 | 林彥伯; 蔡敏嘉; 蔡衡; 黃旭村; 陳俊宏; 黃皓瑋; 鍾全雄; 游鎮烽; | 書刊名 | 臺灣鑛業 |
卷 期 | 76:1 2024.03[民113.03] |
頁 次 | 頁31-46 |
分類號 | 436.311 |
關鍵詞 | 森林火災; 硼同位素; 傅立葉轉換紅外光譜儀; 灰化土; Forest fires; Boron isotope; FTIR spectroscopy; Podzolic soil; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究以海拔3,092公尺的南華天池土壤剖面為研究標的,並藉由FTIR、化學元素分析、硼(B)同位素分析等量化分析,探究南華天池灰化土層的化學特性,以及土壤層序變化,識別全新世中期以來臺灣地區高山的環境變遷事件與森林火災。南華天池層土壤經由ATR/FTIR、KBr/FTIR和XRD等分析技術的應用,揭示多次森林火災的歷史。ATR/FTIR最顯著的特徵峰在1300~900cm^(-1),包含會受熱分解的脂肪烴,高有機碳的深色土壤樣本在此光譜帶的峰值明顯低於其他層位,暗示它們可能經歷了較大規模的森林火災。KBr/FTIR光譜與木炭光譜相近,且可觀察到受熱形成的芳香烴。XRD分析顯示深色土壤中高嶺石和綠泥石含量較低,可能是火災導致羥基破壞的結果。結合FTIR和XRD結果,推斷南華天池層土壤經歷了多次森林火災,溫度範圍約為450~500℃。高有機碳的A層土壤中具有低B含量與δ^(11)B,歷經森林火災導致長時間植被減少與有機碳含量上升,並使土壤風化加劇更多B被脫附帶走,雷利分化模型合理解釋南華天池B與δ^(11)B的顯著變化。總體而言,這些分析結果提供南華土壤至少兩次森林火災的直接證據,森林火災也導致全新世以來南華灰化土層化學特性的顯著改變。 |
英文摘要 | This study focused on the soil profile of the Nanhuashan Tienchi pond at an elevation of 3,092 meters. We explored the chemical characteristics of the Podzolic soils layers in Nanhuashan Tienchi pond and identified changes in soil stratigraphy by using techniques such as FTIR, chemical element analysis, and boron (B) isotope analysis, The goal was to recognize environmental events and forest fires in the high mountain regions of Taiwan since the mid-Holocene. We revealed a history of multiple forest fires. The most significant features in the ATR/FTIR spectra were observed in the range of 1300~900 cm^(-1), including heat-decomposable hydrocarbons. Dark soils with high organic carbon content exhibited significantly lower peaks in this spectral range, implying that they may have experienced larger-scale forest fires. The KBr/FTIR spectra resembled charcoal spectra, and aromatic hydrocarbons formed by heating were observed. XRD analysis indicated lower content of illite and chlorite in dark soils, suggesting the result of hydroxylation destruction caused by fires. Combining FTIR and XRD results, it was inferred that the soil layers in Nanhua Tianchi experienced multiple forest fires with temperatures ranging approximately from 450 to 500℃. These layer soil with high organic carbon showed low B content and δ^(11)B, indicating prolonged vegetation reduction and increased organic carbon content due to forest fires. This led to enhanced soil weathering and more removal of B. Rayleigh fractionation model providing a reasonable explanation for the significant changes in B and δ^(11)B. In summary, these analytical results provide direct evidence of at least two forest fires in Nanhuashan soil, which have significantly affected the chemical characteristics of the Podzolic soils layers in Nanhuashan since the mid-Holocene. |
本系統中英文摘要資訊取自各篇刊載內容。