查詢結果分析
來源資料
頁籤選單縮合
題 名 | 塔塔加鞍部鐵杉林及玉山箭竹之根圈與本體土壤低分子量有機酸含量和有機碳官能基之測定=Determination of Low Molecular Weight Dicarboxylic Acids and Organic Functional Groups in Tsuga and Yushania Rhizosphere and Bulk Soils in the Saddle of Ta-Ta-Chia |
---|---|
作 者 | 陳孟君; 王明光; 邱志郁; | 書刊名 | 土壤與環境 |
卷 期 | 2:2 1999.06[民88.06] |
頁 次 | 頁159-170 |
分類號 | 434.227 |
關鍵詞 | 臺灣鐵杉根圈土壤; 玉山箭竹根圈土壤; 本體土壤; Tsuga rhizosphere soil; Yushania rhizosphere soil; Bulk soil; |
語 文 | 中文(Chinese) |
中文摘要 | 根圈土壤的重要性在於,其為植物生長吸收器官「根」活動所影響的範圍。植物的種類、根分泌的有機物質和養分吸收型態等,都會引發根圈土壤性質的改變,進而改變了根圈養分的動態,對於植物的生長也產生了影響。本研究以玉山塔塔加鞍部原始鐵杉林區為試驗地,選擇該區兩種特有植生--臺灣鐵杉(Tsuga chinensis var. formosana)和玉山箭竹(Yushania niitakayamensis)作為試驗對象,利用氣相層析法及固態核磁共振光譜法,分析根圈土壤與本體土壤間低分子量有機酸的含量和差異,以及根圈環境對於土壤有機質碳組成分佈的影響。 研究結果顯示,在低分子量有機酸含量方面,草酸和琥珀酸的含量以玉山箭竹根圈土壤最高,本體土壤最低;丙二酸和反丁烯二酸的含量以玉山箭竹根圈土壤最高,其餘兩種土壤間,在統計上並無顯著差異存在。就整體而言,低分子量有機酸的含量趨勢為,玉山箭竹根圈土壤>臺灣鐵杉根圈土壤>本體土壤,並且其間有顯著的差異性存在。在有機碳官能基的分佈方面,烷基碳以玉山箭竹根圈土壤所佔的比例最高,本體土壤最低;含氮烷基碳、含氧烷基碳和羧基碳分別以本體土壤、玉山箭竹根圈土壤和臺灣鐵杉根圈土壤所佔的比例最低,酚基碳以本體土壤所佔的比例最高,在其餘兩種土壤間則無差異性存在;乙縮醛碳和芳香基碳的分佈比例,三種土壤間並無差異性存在。綜觀上述結果,根圈中的低分子量有機酸含量與有機碳官能基的分佈會隨著植生狀況的不同,而有所改變。 |
英文摘要 | Rhizosphere is the activity zone nearly plant root. The species of plants, root exudates, and the uptake patten of nutrients influence the soil properties in rhizosphere, consequently dynamic of nutrients, and the plant growth. The study site was located at a typical mountain forest of hemlock (Tsuga chinensis var. formosana), where Yushan cane (Yushania niitakayamensis ) distributes as a majored species in the saddle of Ta-Ta-Chia. The content of the low-molecular-weight organic acids in rhizosphere and bulk soils was measured with gas chromatography. The distribution of functional groups of organic carbon in the soils was determined with solid state nuclear magnetic resonance. The amount of low-molecular-weight organic acids showed the highest oxalic, succinic, malonic and fumaric acids, in the Yushania rhizosphere soil and the lowest in the bulk soil. The amounts of malonic and fumaric acids in bulk soil and Tsuga rhizosphere soil showed no significant difference. In general, the amount of low-molecular-weight organic acids showed as follows: Yushania rhizosphere soil > Tsuga rhizosphere soil > bulk soil in both species. The functional groups of organic carbon showed the highest percentage of alkyl-C in the Yushania rhizosphere soil and lowest in bulk soil. The percentage of N-alkyl-C were the lowest in the bulk soil. However, the Oalkyl-C and carboxylic-C were showed the lowest percentage in the Yushania rhizosphere soil and Tsuga rhizosphere soil, respectively. The highest percentage of phenolic-C is present in bulk soil, but, the rhizosphere soil of the two species showed no significant difference. The percentage of acetal-C and aromatic-C were not significantly difference among the all soils. It was concluded that the properties of rhizosphere soils changed with the plant species. |
本系統中英文摘要資訊取自各篇刊載內容。