查詢結果分析
來源資料
頁籤選單縮合
題名 | 桑樹體碳水化合物及氮素含量之季節變化 |
---|---|
作 者 | 林進財; 余賜金; 謝豐國; | 書刊名 | 中華農學會報 |
卷期 | 164 1993.12[民82.12] |
頁次 | 頁46-55 |
分類號 | 438.1 |
關鍵詞 | 桑樹; 碳水化合物; 氮素; 季節變化; Mulberry(Morus alba L. var. acidosa. G.); Carbohydrates; Nitrogen; Pruning; Seasonal change; |
語文 | 中文(Chinese) |
中文摘要 | 臺桑2號桑樹在一年4次修剪方式下,其樹體中碳水化合物及氮素含量之變化如下: 在碳水化合物方面,樹幹及根部之全碳水化合物、澱粉及可溶性糖含量皆於冬季期間較高,在各季修剪後全碳水化合物及澱粉含量會一時減少,之後又回升,且於冬季修剪者較為明顯。而可溶性糖含量除了秋季修剪後明顯逐漸增加外,在其他季節修剪後則驟然上升,之後又減少。新梢枝條及葉片之全碳水化合物、澱粉及可溶性糖含量均隨著新梢生長而增加。 氮素方面,其樹幹及根部之全氮、蛋白態氮及水溶性氮含量皆於12月至翌年3月間較為高值,修剪對根部之含量變化較明顯。新梢枝條及葉片之全氮、蛋白態氮及水溶性氮含量皆在新梢生長初期時含量較高,之後銳減,但在12月間會稍有增加之現象。 |
英文摘要 | The changes of carbohydrate and nitrogen contents were determined n two-year old Taisang 2 mulberry tress (Mours alba L. var. acidosa G.) after pruning in four seasons from July 1992 to June 1992. Trunks and roots contained higher contents of total carbohydrates, starch and ethanol-soluble sugars in the winter than in the other seasons. Total carbohydrate and starch contents decreased immediately after each seasonal pruning, followed by a steady increase up to the next pruning treatment. On the contrary, the post-pruning changes in contents of ethanol-soluble sugars in the turnks and roots showed the tendency of an initial increase with a subsequent decrease. The only exception was in autumn season where ethanol-soluble content increased continuously after pruning treatment. The contents of total nitrogen, protein nitrogen, and water-soluble nitrogen in the trunks and roots were higher during the winter season from December to March. Pruning showed a significant influence on the changes in N-containing compounds in the roots. For the newly-developed shoots and leaves after pruning, the contents of total nitrogen, protein nitrogen, and water-soluble nitrogen increased markedly for a short period of time, and then decreased drastically until the next pruning treatment. However, the contents remained at a steady state, or increased slightly, during the winter season. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。