查詢結果分析
相關文獻
- Morphology, Geochemistry, and Mineralogy of Serpentine Soils under a Tropical Forest in Southeastern Taiwan
- 不銹鋼電弧焊燻煙暴露危害與評估技術之檢討與建議
- 銅鎳鉻鋅電鍍
- 用石墨電熱式原子吸光法測定工廠廢水中的鎳和鉻
- Effects of Copper, Zinc, Nickel, Chromium and Lead on the Growth of Water Convolvulus in Water Culture
- 於銅上之有效擴散阻絕蒸鍍製程探討
- Inconel 690超合金在600∼900℃含硫氣氛之腐蝕研究
- Process Characterization of Nickel-chromium Alloy Electrodeposition by Statistical Analysis
- 全省稻米中重金屬(鋅、鉻、鎳)含量之調查
- 臺灣煉鋼主要金屬原料供應之研究
頁籤選單縮合
| 題 名 | Morphology, Geochemistry, and Mineralogy of Serpentine Soils under a Tropical Forest in Southeastern Taiwan=臺灣東南部熱帶森林中蛇紋岩土壤之形態學、地質化學及礦物學 |
|---|---|
| 作 者 | 張耀聰; 許正一; 飯塚義之; 余俊德; | 書刊名 | 臺灣林業科學 |
| 卷 期 | 28:4 2013.12[民102.12] |
| 頁 次 | 頁185-201 |
| 分類號 | 436.193 |
| 關鍵詞 | 鉻; 粘土礦物; 地質化學; 鎳; 蛇紋岩土壤; Chromium; Clay mineral; Geochemistry; Nickel; Serpentine soil; |
| 語 文 | 英文(English) |
| 中文摘要 | 蛇紋岩土壤由於鉻、鎳濃度極高且鈣/鎂比值偏低,因此具有生態與環境風險,但在熱帶森林生態系中有關蛇紋石土壤形態特徵、地球化學性質與礦物組成的研究卻不多。因此,本研究在台灣東南部池上地區選擇兩個化育程度不同的樣體(TK-1及TK-2),在美國土壤分類系統中,樣體TK-1屬於新成土而樣體TK-2則為膨轉土。本研究目的為,探討供試土壤樣體之形態特徵,並了解此森林生態系中鉻、鎳在土壤的背景基線及其相關的地球化學過程與礦物性質。研究結果顯示,樣體中如蛇紋石及橄欖石等初生礦物被證實已開始風化,同時也伴隨次生型氧化鐵的明顯累積。然而,這兩個樣體的酸鹼值小於7.0且有機碳含量很低。雖然陽離子交換容量很高,但土壤中缺鉀的情況在雲母、蛭石及蒙特石較多時,愈是明顯。土壤顆粒表面的交換位置上鎂多於鈣,且趨近底土時鎂多於鈣的差距愈大。本研究之鉻、鎳全量遠高於台灣土壤的背景值,而隨著礦物逐漸的風化,釋出了易變動性鉻、鎳,這些鉻、鎳自礦物釋出後即與次生型氧化鐵結合。因此,連二亞硫酸鹽-檸檬酸鹽-碳酸鹽混合液所能萃取的鉻、鎳濃度在風化程度較高的樣體TK-2會高於樣體TK-1,因為透過氧化鐵吸附或共沉澱而固定了較多的鉻、鎳。再者,由於樣體間粘土礦物組成差異的重要性,突顯了森林經營管理上必須因位置不同而需要有區域特異性的策略考量。 |
| 英文摘要 | Serpentine soils pose ecological or environmental risks because of high levels of Cr and Ni and low Ca/Mg ratios. Studies on the morphological characteristics, geochemical processes, and the mineralogical composition of serpentine soils in tropical forest ecosystems are limited. Two pedons (TK-1 and TK-2) on the ophiolite complex in the Chishang area, southeastern Taiwan, were chosen to represent the degree of soil development. The TK-1 pedon is an Entisol, whereas the TK-2 pedon is a Vertisol based on the US soil classification system. This study explored the soil morphology to establish a regional baseline for naturally occurring Cr and Ni to link to related soil geochemical properties and mineral features in this tropical forest ecosystem. The results indicated that weathering of primary minerals (i.e., serpentine and olivine) has occurred, and pedogenic Fe oxides have accumulated in the soils. However, both pedons had pH values of < 7.0, and amounts of organic carbon were low. Their cation exchange capacities were high; however, the deficiency of K in these soils may be exacerbated by the presence of clay minerals, such as mica, vermiculite, and smectite. At the exchange sites of the soils, Mg was higher than Ca, and the difference was obvious toward the bottom of the soil profile. Total contents of Cr and Ni greatly exceeded background levels in other parts of Taiwan. Clear amounts of labile Cr and Ni may have been fixed by pedogenic Fe oxides, which corresponds to the observation of serpentine mineral weathering. Concentrations of dithionite-citrate-bicarbonate-extractable Cr and Ni increased with soil development because of sorption/co-precipitation by pedogenic Fe oxides, which accumulated more in the TK-2 pedon than in the TK-1 pedon. Moreover, differences in the clay mineral composition between pedons indicate the importance of understanding the localized mineralogy when developing effective site-specific forest management strategies. |
本系統中英文摘要資訊取自各篇刊載內容。