| 打顶对烟草生长、钾素吸收及其分配的影响 |
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| 引用本文： | 郭丽琢,张福锁,李春俭.打顶对烟草生长、钾素吸收及其分配的影响[J].应用生态学报,2002,13(7):819-822. |
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| 作者姓名： | 郭丽琢 张福锁 李春俭 |
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| 作者单位： | 1. 甘肃农业大学农学院,兰州 730070
2. 中国农业大学农业部植物营养学重点开放实验室,北京,100094 |
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| 基金项目： | 国家重点基础研究发展规划项目 (G19990 1170 7)，国家自然科学基金资助项目 ( 30 0 70 45 2 ) . |
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| 摘 要： | 与不打顶相比，打顶并未增加烟株最终的干物质及K累积量，但由于消除了顶端对有机物质及K的强烈竞争，使无谓消耗于顶中的1／3的同化物及K运向其它器官，从而使叶片中累积的同化物及K由不打顶时的1／3左右提高到1／2左右，有利于同化产物及K在叶内的累积；此外打顶不了根对同化产物的竞争能力，因而要系发达、烟叶产量及其含K量显著增加，打顶后用NAA处理茎断口并不能提高烟叶产量，但烟株有烟叶内K的最终累积量增加，因此与公打顶相比可明显提高生育后期叶片K含量。
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| 关 键 词： | 打顶 烤烟 萘乙酸 K素 |
| 文章编号： | 1001-9332(2002)07-0819-04 |
| 修稿时间： | 2000年10月30 |
Effects of decapitation on growth, uptake and distribution of potassium in tobacco |
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| GUO Lizhuo,ZHANG Fusuo,LI Chunjian.Effects of decapitation on growth, uptake and distribution of potassium in tobacco[J].Chinese Journal of Applied Ecology,2002,13(7):819-822. |
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| Authors: | GUO Lizhuo ZHANG Fusuo LI Chunjian |
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| Institution: | Key Laboratory of Plant Nutrition of Ministry of Agriculture, China Agricultural University, Beijing 100094. |
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| Abstract: | Compared with intact plants, decapitation did not cause increase in dry weight of tobacco plant and in potassium accumulation 8 weeks after the treatment. In intact plants, about 1/3 of assimilation and potassium were transported into the top, and only about 1/3 of those deposited in the leaves. Decapitation resulted in about 1/2 of assimilation and potassium distributing in the leaves, so it was more effective. Application of NAA on the stump of the stem did not influence leaves yields, but accumulation of potassium in the upper and middle leaves was enhanced. |
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| Keywords: | Decapitation Flue cured tobacco NAA Potassium |
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