頁籤選單縮合
題 名 | 葉綠素計應用於水稻植體氮營養狀況之測定=Application of Chlorophyll Meter to Predict Nitrogen Status of Rice Plant |
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作 者 | 羅正宗; 陳一心; 陳宗禮; | 書刊名 | 中華農業研究 |
卷 期 | 53:3 2004.09[民93.09] |
頁 次 | 頁179-192 |
分類號 | 434.113 |
關鍵詞 | 水稻; 葉綠素計; 氮營養狀況; 迴歸分析; Rice; SPAD; Nitrogen content; Chlorophyll meter; |
語 文 | 中文(Chinese) |
中文摘要 | 本試驗於2000年第一期作及第二期作在農業試驗所嘉義分所溪口試驗農場進行,利用不同氮肥施用量及栽植密度處理,探討水稻在不同期作及不同生育期中,應用葉綠素計測定植體氮營養狀況之可行性。由結果可知水稻植體氮含量隨生育日數之進展而降低,在不同氮肥處理、不同栽植密度及不同期作間均有相似的情形。就水稻葉片氮含量之變化而言,其表現多與植體氮含量之變化相似,呈現疏植高於密植,重氮肥處理高於低氮處理,栽植密度處理間則差異較小。兩期作不同生育期間,各參試品種之植體氮含量與葉片氮含量之關係呈高度正相關,相關係數值均達0.9以上。葉片及植體氮含量與葉綠素計值之直線迴歸分析的結果,顯示第一期作四個生育期與第二期作抽穗期及乳熟期所建立之直線迴規模式,其決定係數均較高(R² >0.6),唯第二期作之分藥盛期及幼穗分化期所建立之模式的決定係數則較低(R² >0.4),顯示欲應用葉綠素計於水稻植體氮營養狀況之測定,需依不同生育期分別建立二者之關係式,方能提高其應用性。 |
英文摘要 | This experiment was undertaken on Chico Farm of Chiayi Agricultrual Experiment Station, during the first and the second crop season in the year of 2000. It was to explore the feasibility to apply chlorophyll meter to predict nitrogen status of rice plant during different crop seasons at various growth stages. The result shows that nitrogen content of rice plant decreased with growth days, which applies to conditions of different nitrogen rates, planting densities and crop seasons. As for the variation of nitrogen content on rice leaf, it performed mostly similar to the variation of nitrogen content on rice plant and also presented the content was more on loose-planted than on densely-planted, more on high nitrogen rate than on low nitrogen rate. The relation between the nitrogen content of rice plant leaf blade on participating varieties are highly positive correlation on different growth stages in the two crop seasons and the correlation coefficients are all over 0.9. Except the most tillering stage and the heading during second crop season (R² >0.4), the coefficients of determination (R² ) of the linear regression analysis of nitrogen content of leaf blade and rice plant on SPAD reading value were all greater the 0.6. |
本系統中英文摘要資訊取自各篇刊載內容。