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題 名 | 利用葉綠素測計估測莧菜植體葉綠素及氮素狀態=Estimating Chlorophyll and Nitrogen Status in Plants of Amaranthus mangostanus with Chlorophyll Meter |
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作 者 | 楊純明; 沈百奎; 余志儒; 羅朝村; 吳正宗; | 書刊名 | 中華農業研究 |
卷 期 | 52:2 2003.06[民92.06] |
頁 次 | 頁107-118 |
分類號 | 435.24 |
關鍵詞 | 葉綠素測計; 迴歸模式; 莧菜; 葉綠素; 氮素; Chlorophyll meter; Regression model; Amaranth mangostanus; Chlorophyll; Nitrogen; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究於臺中縣霧峰鄉行政院農業委員會農業試驗所農場進行田間試驗,以葉綠素測計量測2001-2002年=不同作季莧菜植株葉片之測計讀值,同時取樣化學分析葉片葉綠素總量及地上部植體全氮含量,以探討利用葉綠素測計估測莧菜植體葉綠素及氮素狀態之可行性。試驗資料顯示,葉綠素測計讀值與莧菜植株葉片之葉綠素總量間呈現直線正相關(R²=0.637,P<0.0001),而且地上部植體之全氮含量與葉片葉綠素總體之間亦為直線正相關(R²=0.544,P<0.0001)。進一步進行葉綠素測計讀值與地上部植體全氮含量之迴歸分析,結果顯示兩者之間關係仍然十分密切,達到顯著相關(R²=0.581,P<0.0001)。將另一季於2002年10月4日採收之莧菜植株葉綠素測計讀值輸入上述迴歸模式中,所得估測值經與本季化學分析之葉片葉綠素總量及地上部植體全氮含量實測值比較,發現各別相關係數均達極顯著(P<0.01)。綜合本研究結果,顯示葉綠素測計可利用於估測莧菜植體葉綠素及氮素狀態,具有應用於莧菜氮肥管理之潛力。 |
英文摘要 | Three field experiments were conducted at Taiwan Agricultural Research Institute Experimental Farm (Wufeng, Taiwan) to evaluate the growth response of Amaranthus mangostanus L., cultivar TNG 67 to different levels of nitrogen fertilizer application during the growing seasons of 2001-2002. Data were collected on leaf total chlorophyll, aboveground nitrogen, and readings of chlorophyll meter from leaves at harvest. Results of regression analyses indicated positive linear correlation between leaf total chlorophyll and readings of chlorophyll meter (R²=0.637,P<0.0001) and between aboveground nitrogen and leaf total chlorophyll (R²=0.544,P<0.0001). The relationship between aboveground nitrogen and readings of chlorophyll meter was also linear (R²=0.581,P<0.0001). Regression models validation by using data from another experiment showed a significant correlation between the estimated and the measured values. It suggests that chlorophyll meter is a suitable tool for the assessment of chlorophyll and nitrogen status in plants of Amaranth mangostanus. |
本系統中英文摘要資訊取自各篇刊載內容。