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題 名 | 水筆仔(Kandelia candel)之無機營養=Mineral Nutrition of Kandelia Candel (Mangrove) |
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作 者 | 翁建堯; 林鴻淇; | 書刊名 | 中國農業化學會誌 |
卷 期 | 36:5 1998.10[民87.10] |
頁 次 | 頁483-492 |
分類號 | 373.42 |
關鍵詞 | 紅樹林植物; 無機營養; 生長反應; 鹽生植物; Mangrove; Mineral nutrition; Growth response; Halophytes; |
語 文 | 中文(Chinese) |
中文摘要 | 潮水泥沼地的土壤含鹽分,經常在浸水狀態下,含有豐富的有機質。在這樣的特 殊環境下能優勢生長的紅樹林植物-水筆仔,如何達成無機養分之和諧營養是本篇報告探討的 主題。用砂耕栽培水筆仔,砂耕盆則浸在外盆的水中。在變動外盆水中的鹽分及微量元素濃 度下,觀測水筆仔的生長反應及分析植株器官的無機養分組成。經長達27個月的觀測,其生 長反應顯示:不施加鹽分下,水筆仔葉片下垂、發育停滯,以1.0% NaCl(w/v)浸泡約一星期 即能恢復生長。浸泡鹽分導致頂葉黃化,經提高微量元素養分濃度10倍到100倍予以克服。 提高浸泡溶液中食鹽及微量元素濃度時也提升水筆仔葉部氮、鎂、磷含量。地下部之微量元 素:鐵、銅、鋅的含量遠高於地上部。由所得結果歸納:水筆仔是喜鹽的鹽生植物並適於在 微量元素如鐵、銅、鋅等供應很高之生長環境下生長。 |
英文摘要 | The characteristic of a tidal marsh soil is rich in sodium salt and humic substances and undergoes regular inundation. Under such conditions, how tidal marsh plants can achieve a harmonious composition of mineral nutrients was the focus of this study. Investigation into growth responses of a mangrove plant Kandelia candel (L.) Druce was conducted under sand culture with or without inundation solution. The inundation solution contained varying concentrations of NaCl as well as micronutrients. Concentrations of mineral nutrients in different organs of two years old seedlings of K. candel were analysed separately. Results indicated that responses of stunted leaves and shoot growth stagnation by K. candel could be restored within a week after inundating those sand culture plants with 1% NaCl solution (w/v). Chlorosis of young leaves as induced by NaCl could be restored when the concentrations of the micronutrients in the inundation solution were increased by 10- to 100-fold. Furthermore, such supply levels of both NaCl and micronutrients in the inundation solution seemed to enhance the mineral nutrition of N, P, Mg in the leaves of K. candel. Concentrations of Fe, Cu and Zn in seedlings of K. candel were much higher in the under-ground organs than in the above-ground organs. The results suggest that K. candel is a kind of halophyte which has adapted to growth conditions in which large amounts of micronutrients, such as Fe, Cu, and Zn, are supplied. |
本系統中英文摘要資訊取自各篇刊載內容。