| 利用15N示踪法研究土壤氮对烤烟氮素累积和烟碱合成的影响 |
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| 引用本文： | 习向银,晁逢春,李春俭.利用15N示踪法研究土壤氮对烤烟氮素累积和烟碱合成的影响[J].植物营养与肥料学报,2008,14(6):1232-1236. |
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| 作者姓名： | 习向银 晁逢春 李春俭 |
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| 作者单位： | 1.西南大学资源环境学院,重庆 400715; |
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| 摘 要： | 以烤烟（Nicotiana tabacum L. K 326）为试验材料，在大田条件下，利用15N示踪法，研究了土壤氮对烤烟氮素累积和烟碱合成的影响。结果表明，对烤烟氮素累积和烟碱合成的影响，土壤氮比例均随叶位上升而上升，且打顶后三个叶位和根茎均随生育时期推进而显著增加；打顶后烤烟各器官的土壤氮占总氮比例和占总烟碱氮比例分别为50%和60%，显著高于肥料氮。
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| 关 键 词： | 烤烟 15N示踪法 打顶 氮素累积 烟碱合成 |
| 收稿时间： | 2007-8-5 |
Study on the effect of soil-N on nitrogen accumulation and nicotine biosynthesis in flue-cured tobacco using 15N-traced method |
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| XI Xiang-yin,CHAO Feng-chun,LI Chun-jian.Study on the effect of soil-N on nitrogen accumulation and nicotine biosynthesis in flue-cured tobacco using 15N-traced method[J].Plant Nutrition and Fertilizer Science,2008,14(6):1232-1236. |
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| Authors: | XI Xiang-yin CHAO Feng-chun LI Chun-jian |
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| Institution: | 1.College of Resources and Environmental Sciences,Southwest University,Chongqing 400715,China; |
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| Abstract: | In this research, flue-cured tobacco cultivar (Nicotiana tabacum L. K 326) was selected to study the effect of soil-N on nitrogen accumulation and nicotine biosynthesis in flue-cured tobacco using the N15-trace method in a field experiment. The results indicated that soil-N ratios had an increasing effect on nitrogen accumulation and nicotine synthesis with leaf position ascending, and the effect of soil-N ratios of three leaf positions and root and stem after removing the apex also increased with growth stages. Soil-N ratios of all organs after removing the apex were higher 50% and 60%, all significantly higher than fertilizer-N ratios. |
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