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題 名 | 季節性氣象因子變化對葉菜甘藷生育量之影響=Effects of Seasonal Changes of Climatic Factors on the Growth of Leafy Sweet Potato |
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作 者 | 利幸貞; 李炳和; 陳一心; 劉復誠; | 書刊名 | 中華農業氣象 |
卷 期 | 5:2 1998.04[民87.04] |
頁 次 | 頁93-100 |
分類號 | 434.317 |
關鍵詞 | 氣象因子; 葉菜甘藷; 鮮重生長速率; 粗纖維; Climatic factors; Leafy sweet potato; Growth rate; Crude fiber; |
語 文 | 中文(Chinese) |
中文摘要 | 露天栽培之葉菜甘藷由插植至第一次採收所需生育日數長短與鮮重生長速率均顯 著受氣象因子影響。藉由複迴歸分析結果,影響葉菜甘藷生育日數長短的主要限制因子為冬 季低溫及夏季插植後植株生長勢未恢復前密集的高降雨量。隨著栽培期溫度的升高,有利於 鮮重生長速率的增加,但若是在插植後根系未形成及採收後切口未癒合時受到多量且長時間 的降雨侵害,則不但植株成活困難且枝蔓易因淹水而腐爛。但不同於一般夏季葉菜類如小白 菜受雨害導致葉片機械損傷而無法採收的情形,葉菜甘藷即使在豪雨期仍能保持葉片的完整 ,所生產的芽梢仍能維持其販賣品質。對葉菜甘藷鮮嫩度而言,雨水多則葉片粗纖維含量降 低,但溫度對葉片與莖梗部分的影響不同,葉片的組纖維含量雖會因高溫增加,但莖梗部分 的粗纖維含量則受低溫影響而增加,可能與低溫造成生育期延長使得莖梗組織老化有關。 |
英文摘要 | When leafy sweet potato was grown in open field, the time needed to the first harvest and growth rate were highly affected by climatic factors. According to the result of multiple regression analysis, the constraints for growth were low temperature in winter and high precipitation right after planting in summer. Growth rate increased as temperatures went up. However, torrential rains were detrimental to the growth rate when the root system was not well developed and when there were wounds after harvest. Leaves of leafy sweet potato remained intact under the torrential rains, which made it distinct from other summer leafy vegetables and was still acceptable to consumers. The content of the crude fiber in the leaf was decreased at high rainfalls and high temperature, thus improved the tenderness of the quality. However, Crude fiber content in the stem and petiole. increased as the temperature decreased. This might result aged from tissue due to slow growth at low temperatures. |
本系統中英文摘要資訊取自各篇刊載內容。