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題 名 | 養液溫度對結球萵苣光合作用、呼吸作用及生長的影響 |
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作 者 | 何韻詩; 翁仁憲; | 書刊名 | 技術學刊 |
卷 期 | 7:4 1992.12[民81.12] |
頁 次 | 頁417-421 |
分類號 | 435.252 |
關鍵詞 | 生長; 光合作用; 呼吸作用; 結球; 溫度; 萵苣; 養液; |
語 文 | 中文(Chinese) |
中文摘要 | 結球萬直以水耕方式,在夏季無空調之玻璃溫室中,栽種於控溫(20°及25°)和不控溫(自然溫度29° ~31°)兩種養液。定植後第19 日及28 日測其全株之光合畫、呼吸暈、葉面積、根、莖、葉乾重,葉綠素含量及全糖百分比。由此計算出光合率、呼吸率、光合量比呼吸量,葉面積比(LAR)和光合量比葉面積(SLA)。結果顯示,生長於控溫養液的植株,定植28日後其葉面積和根、莖、葉乾重均顯著大於生長於不控溫者超過76%。控溫組植株之葉綠素含量及全糖含量百分比顯著低於不控溫者。控溫組之呼吸率及LAR較低,但不顯著。因此顯示結球萬直生長在控溫的養液中,顯著減少代謝消耗而將同化物質運用於營養生長。 |
英文摘要 | Head lettuce (Lactuca Sativa L.) was hydroponically grown in nutrient solution at two different temperatures which were 25/20°C day and night in a fan ventillated and partly shaded glass house, and uncontrolled nature temperature (29° - 31 °C) in the summer. Photosynthesis rate, respiration rate, leaf area, dry weight of root, stem and leaf, chlorophyll content and percentatge of total sugar (TNC) were measured on the 19th and 28th day after planting on nutrient solutions. Plants grown on nutrient solution of lower temperature (25°/20°C) had significantly 76%more leaf area, and dry weight of root, stem and leaf than those of uncontrolled plants. The chlorophyll content and TNC percentage of temperature controlled plants were significantly lower than those of uncontrolled plants. Temperature controlled plants had lower resiperation rate and LAR (Leaf Area Ratio), but the differences were nonsignificant. The results showed that lower solution temperature could significantly reduce the disassemble of assimilate and which was used in vegetable-growth. |
本系統中英文摘要資訊取自各篇刊載內容。