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題名 | 溪頭地區孟宗竹根圈與本體土壤理化性質之分析與碳-13核磁共振光譜之探討= Nuclear Magnetic Spectrosocopy Analyses of Phyllostachys Pubescens, Rhizosphere and Bulk Soils at Chi-Tou Region |
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作者 | 杜大治; 王亞男; 王明光; | 書刊名 | 國立臺灣大學農學院實驗林研究報告 |
卷期 | 16:2=236 2002.06[民91.06] |
頁次 | 頁115-122 |
分類號 | 436.193 |
關鍵詞 | 孟宗竹; 根圈土壤; 本體土壤; 固態核磁共振; Phyllostachys pubescens; Rhizosphere soil; Bulk soil; Solid state nuclear magnetic resonance; |
語文 | 中文(Chinese) |
中文摘要 | 本研究以國立臺灣大學農學院實驗林溪頭營林區孟宗竹林(Phyllostachys pubescens)作為試驗對象,比較根圈土壤與本體土壤的基本物理化學性質(如pH值、陽離子交換容量、土壤質地、有機碳和含氮總量等)。在基本物理化物性質方面,孟宗竹的根圈土壤中,pH值皆低於本體土壤,而陽離子交換容量、黏粒含量、有機碳和總氮含量皆較本體土壤的含量高。並利用固態核磁共振光譜法,分析孟宗竹植體和土壤有機質碳組成分布,藉以研判根圈環境對於土壤有機質碳組成分布的影響。在本研究中,在烷基碳的官能基分布方面,根圈土壤含量高於本體土壤。在芳香基碳以及酚基碳的官能方面,根圈土壤的含量皆低於本體土壤。在有機質碳的官能基方面,土壤有機質的來源與組成,決定了土壤中有機質的分解速率與有機碳官能基分布情形。 |
英文摘要 | The study site was located at Chi-Tou Region where forest grows. We compared the soil physical and chemical properties, such as pH, cation-exchange capacity (CEC), soil texture, organic carbon, and the total nitrogen contents between rhizosphere and bulk soils. The basic soil physical and chemical properties showed that pH value of rhizosphere soils were lower than those in bulk soil. The CEC, clay content, and the amount of organic carbon and total nitrogen in rhizosphere soils are higher than those of bulk soils. The distribution of functional groups of organic carbon in the soils were determined with 13C solid-state nuclear magnetic resonance (13C NMR). The functional groups of organic carbon showed that higher percentage of alkyl-C in the Phyllostachys pubescens rhizosphere soil than in bulk soils. The percentage of N-alkyl-C were low in the bulk soil. However, the O-alkyl-C and Carboxyl-C were showed the low content in the Phyllostachys pubescens rhizospere soils. The higher percentage of aromatic-C and phenolic-C are present in bulk soils. It concluded that the properties of rhizosphere soils changed with the plant existence. |
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