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題名 | 硝酸態氮與銨態氮比例對草莓'豐香'生長與種苗生產之影響=Effects of NO₃and NH4+ Ratio on Growth and Runner Propagation of Strawberry (Fragaria x ananassa Duch.) cv. Toyonoka |
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作者 | 鄔家琪; 許碩庭; Wu, Chia-chyi; Hsu, Shou-ting; |
期刊 | 宜蘭大學生物資源學刊 |
出版日期 | 20120700 |
卷期 | 8:1 2012.07[民101.07] |
頁次 | 頁25-31 |
分類號 | 435.365 |
語文 | chi |
關鍵詞 | 草莓; 氮肥型態; 營養生長; 走莖生產; Strawberry; Nitrogen form; Vegetative growth; Runner production; |
中文摘要 | 為探討草莓營養生長與種苗生產最適之氮肥型態比例,以100:0、75:25、50:50、25:75等四種不同硝酸態氮(NO3^-)與銨態氮(NH4^+)比例水耕液處理草莓‘豐香’植株,結果顯示100:0之硝酸態氮處理下有最多葉數、最大葉面積、植株鮮乾重與走莖數,且葉綠素含量與光合作用率最高,隨著銨態氮比例的增加,植株生長下降,甚至死亡。顯示草莓植株營養生長期間偏好硝酸態氮,並對銨態氮毒害較為敏感。因此‘豐香’草莓營養生長期間,使用100%硝酸態氮可顯著促進草莓生長與走莖生成,或可用於種苗商業生產。 |
英文摘要 | The effects of NO3^-:NH4^+ ratios (100:0, 75:25, 50:50, 25:75) in the nutrient solution on growth and runner production in hydroponically grown strawberry (Fragaria×ananassa Ouch. cv. Toyonoka) were evaluated. Results showed the treatment of 100:0(NO3^-:NH4^+)had the highest leaf number, leaf area, fresh and dry weights, crown diameter, chlorophyll content, photosynthetic rate and produced the most runners. The decrease ratio of NO3^- to NH4^+ ratio in the nutrient solution would reduce the strawberry growth and runner production. Higher NO3^- -N source supplied to the plants seemed more suitable for strawberry vegetative growth, while more NH4^+ caused deleterious effects. Strawberry was sensitive to NH4^+ toxicity. Our results suggested that using NO3^- as nitrogen source for vegetative growth and runner production of strawberry cv. Toyonoka seems a feasible strategy. It will be possible to implement this technique in a commercial scale. |
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