季節性氣象因子變化對葉菜甘藷生育量之影響
Other Title
Effects of Seasonal Changes of Climatic Factors on the Growth of Leafy Sweet Potato
Journal
中華農業氣象
Journal Volume
5
Journal Issue
2
Pages
93-100
Date Issued
1998-04-13
Date
1998-04-13
Author(s)
利幸貞
李炳和
陳一心
劉復誠
Hsin-Chen Lee
Bing-Her Lee
Yi-Hsin Chen
Fu-Cheng Liu
Abstract
露天栽培之葉菜甘藷插植至第一次採收所需生有日數長短與鲜重生長速率均顯著受氣象因子影響。藉由複迥歸分析結果，影響葉菜甘藷生育日數長短的主要限制因子爲冬季低溫及夏季插植後植株生長勢未恢愎前密集的高降雨位。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晋品質。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，葉片的粗纖維含量雖會因高溫增加，但莖梗部分的粗纖維含量位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。
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.
Subjects
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
Publisher
中華農業氣象學會
Type
journal article
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