頁籤選單縮合
題 名 | 固定介質酸鹼度下氮肥型態對非洲菊生育之影響=Effect of Nitrogen Forms on Growth of Gerbera under Constant pH Culture Condition |
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作 者 | 林燕玉; | 書刊名 | 桃園區農業改良場研究報告 |
卷 期 | 33 1998.06[民87.06] |
頁 次 | 頁22-27 |
分類號 | 435.435 |
關鍵詞 | 非洲菊; 氮肥型態; 硝酸態氮; 銨態氮; NH咴-N; NO哐-N; Gerbera; N-form; |
語 文 | 中文(Chinese) |
中文摘要 | 本試驗以碳酸鈣調整介質使其pH值維持在6.5±0.1,可去除銨態氮酸化介質的影 響因子,再行探討施用五種 NH/NO 百分比率 (100/0、75/25、50/50、25/75、0/100) 氮肥 對非洲菊生育的影響、試驗結果以 75 % NH 處理的植株生長最佳,株高 18.7cm, 地上部 乾物重 15.2 g/pot,明顯優於完全施 NO 者,其次為施用 100 % NH 的試區,其乾物重為 12.6 g/pot。 從花朵品質方面來看,完全施用 NO 試區之花幅 7.4cm 最小,而 50-100 % NH 處理之花幅較大, 其中以施用 50 % NH 之花幅 8.5 cm 最大,可見高比率銨態氮有促 進葉片營養生長及增加非洲菊花朵大小的效應。葉片成份分析結果顯示葉片氮含量有隨銨態 氮比率降低而減少的趨勢,鉀濃度及 K/Ca、K/Mg 濃度比值則明顯提高;各處理鈣與鎂含量 差異雖不顯著, 但由於鉀與鈣、鎂在養分吸收及生理有效性上具拮抗作用, K/Ca 及 K/Mg 比值的提高,會降低植體內利用鈣及鎂的效率,因此需提防產生作物缺鈣或缺鎂的症狀。 |
英文摘要 | A peatmoss pot culture experiment was conducted to study the effect of different N-form of inorganic fertilizers on the growth of gerbera (Gerbera jamsonii B.) without considering the media acidification with NH -N. The constant culture pH(6.5 ± 0.1) were maintained by the addition of CaCO �� during experiment period. The combination of 5 NH/NO percentage ratios of 100/0, 75/25,50/50,25/75 and 0/100, respectively, were used at equivalent N rate. Gerbera fed with higher ratios of NH fertilizer had better vegetable growth and flower size. The best shoot growth was obtained from 75% NH treatment, the plant height, 18.7 cm, and dry weight of top, 15.2 g/pot, were higher than NO treatment alone significantly. The larger flower size were found in 50-100% NH treatments, especially fertilized with 50% NH had the largest flower, 8.5 cm, and stalk lenght, 23.8 cm. Increasing the percentage ratio of NH -N increased leaves N concentration, but decreased K concentration and K/Ca, K/Mg ratios although Ca and Mg contents in leaves were not different among all treatments significantly. We deserves attention for the K effect on possible interference with the uptake and physiological availability of Ca and Mg. |
本系統中英文摘要資訊取自各篇刊載內容。