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題名 | 不同氮源處理對萵苣硝態氮含量日變化與鮮重的影響=Effect of Nitrogen Source on Diurnal Variation of Nitrate Content and Fresh Weight of Lettuce |
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作 者 | 王三太; 林深林; 張武男; | 書刊名 | 興大園藝 |
卷期 | 22:1 1997.06[民86.06] |
頁次 | 頁43-50 |
分類號 | 435.23 |
關鍵詞 | 日變化; 硝態氮含量; 氮源; 鮮重; Diurnal variation; Nitrate content; Nitrogen source; Fresh weight; |
語文 | 中文(Chinese) |
中文摘要 | 萵苣(Lactuca sativa L.) R36品種以3mM硝酸鈣(6mM N)或3mM硝酸銨(6mM N) 處 理,於8月12日 下午8 點開始採收,每隔3小時採收一次,採收至8月13日 下午5點。3mM硝 酸鈣與3mM硝酸銨兩種養液處理的地上部硝態氮含量皆有日變化,而且在8個採收時間,3mM 硝酸鈣養液處理的地上部硝態氮含量皆高於3mM硝酸銨處理。8個採收時間的硝態氮含量平 均,3mM硝酸鈣養液為乾物含量的0.68% ,而3mM硝酸銨處理為0.29% 。3mM硝酸銨養液處理 的地上部與根部鮮重分別為3mM硝酸鈣處理的1.43倍及1.2倍。 |
英文摘要 | Lettuce(Lactuca sativa L., cv. R36) plants were hydroponically grown in solutions containing 3mM Ca (NO �� ) �� or 3mM NH �� NO �� as nitrogen source. Mature plants were harvested eight times in one day at a 3 hr. interval from 8:00 PM Aug. 12 to 5:00 PM Aug. 13. Diurnal variations of the shoot nitrate content were observed in either Ca(NO �� ) �� or NH �� NO �� treatment. Shoot nitrate content of Ca(NO �� ) �� treated plants were higher than those treated with NH �� NO �� at every harvest. The average shoot nitrate content of lettuce with Ca(NO��)�眨as 0.68% of the dry weight, and it was 0.29% for the NH�淇O�� treated lettuce. The fresh weight of the NH�淇O�配reated lettuce were 1.43 or 1.2 fold heavier than those with Ca(NO��)�眩reatment for shoot or root respectively. |
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