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題 名 | Distribution and Nutrient Contents of Fine Roots in the Fushan Subtropical Broadleaf Forest in Taiwan=福山亞熱帶闊葉林細根的分布和養分含量 |
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作 者 | 林國銓; 王巧萍; 馬復京; | 書刊名 | 臺灣林業科學 |
卷 期 | 20:1 2005.03[民94.03] |
頁 次 | 頁1-11 |
分類號 | 436.12 |
關鍵詞 | 細根; 養分含量; 亞熱帶闊葉林; 挖掘法; 根長比; Fine roots; Nutrient content; Subtropical broadleaf forest; Excavation method; Specific root length; |
語 文 | 英文(English) |
中文摘要 | 本研究調查台灣東北部福山亞熱帶?葉林細根的生物量和長度,並分析其養分的濃度及在土壤內累積量。結果發現:細根密度隨深度增加而下降。在0~30 cm土壤中,< 2 mm細根生物量約677 g m-2;2~5 mm細根約335 g m-2;死根約61 g m-2。至於< 2 mm細根總長約為3,860 m m-2,2~5 mm細根僅為120 m m-2。福山細根生物量高於溫帶林者,與熱帶雨林者相近。主要可能是暴雨造成土壤的P有效量較低,促進細根累積。同時,細根累積大量的N和P,使細根在生態系養分儲存中占重要地位。 |
英文摘要 | The biomass and nutrient contents of fine roots were investigated and estimated in the Fushan subtropical broadleaf forest in northeastern Taiwan. The result indicated that the fine root density decreased with increasing soil depth. In 0~30 cm of soil, the biomass of fine roots was approximately 677 g m-2 for a size of < 2 mm, 335 g m-2 for 2~5-mm fine roots, and 61 g m-2 for the necromass. The total length of fine roots of < 2 mm was approximately 3,860 m m-2, but only 120 m m-2 for 2~5-mm roots. The fine root biomass in Fushan is higher than that in temperate forests and similar to that in tropical rain forests. This may mainly be due to the lower available P as a result of torrential rains, which promotes the accumulation of fine roots. At the same time, as fine roots accumulate a large amount of N and P, they play an important role in the storage of nutrients in the ecosystem. |
本系統中英文摘要資訊取自各篇刊載內容。