| 水分亏缺对烤烟光合特性和氮代谢的影响 |
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| 引用本文： | 邵兰军,陈建军,王维.水分亏缺对烤烟光合特性和氮代谢的影响[J].中国农学通报,2010,26(21):136-141. |
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| 作者姓名： | 邵兰军 陈建军 王维 |
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| 作者单位： | 1. 广东中烟工业有限责任公司,广州,510310
2. 华南农业大学烟草研究室,广州,510642 |
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| 基金项目： | 优质浓香型特色烟叶的关键生产技术研究与推广应用 |
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| 摘 要： | 通过真空表式土壤张力计监测土壤水势，以正常氮处理的烟株为对照，对生育后期由于施肥过多而严重影响烟叶品质的烤烟K326和NC89，进行有控制的水分亏缺处理，研究以水控氮对烤烟光合特性和氮代谢的影响，探讨以水调肥改善烟叶品质的生理原因。结果表明：两种氮肥营养下，土壤水分亏缺降低了叶片的净光合速率和蒸腾速率，而施高氮较好的抑制了这种下降；适度的土壤水分亏缺抑制了硝酸还原酶的活性，降低了中上部叶全氮的含量，从而有效抑制了高氮营养下烤烟成熟期的氮代谢。
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| 关 键 词： | 木槿 木槿 花粉 TTC 培养基 |
| 收稿时间： | 2010/2/25 0:00:00 |
| 修稿时间： | 2010/4/14 0:00:00 |
The Effect of Water Deficit on photosynthetic characteristics and nitrogen metabolism at High Nitrogen Nutrition in Flue-cured Tobacco (Nicotiana tabacum L.) |
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| Shao Lanjun,Chen Jianjun,Wang Wei.The Effect of Water Deficit on photosynthetic characteristics and nitrogen metabolism at High Nitrogen Nutrition in Flue-cured Tobacco (Nicotiana tabacum L.)[J].Chinese Agricultural Science Bulletin,2010,26(21):136-141. |
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| Authors: | Shao Lanjun Chen Jianjun Wang Wei |
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| Institution: | 1 Raw Materials Center of China Tobacco Guangdong Industrial.co.,Ltd,Guangzhou 510310;2 Lab of Tobacco Study,South China Agricultural University,Guangzhou 510640) |
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| Abstract: | The effects of soil water deficit on photosynthetic characteristics and nitrogen metabolism were analyzed.The aim of the experiment was to provide the theory for improvement the quality of by using water to control the nitrogen uptaking.A pot experiment was conducted with 2 typical varieties of flue-cured tobacco （K326 and NC89）,and 2 nitrogen levels and 2 water treatments,in contract to normal nitrogen.The results were as follows：Soil drying decreased the photosynthetic rate and transpiration rate,and heavy use of nitrogen inhibited this descend.The synergistic effect of nitrogen and water improved the leaf quality.Water deficit significantly decreased the uptake of nitrate,inhibited the activity of nitrate reductase,and decreased the total nitrogen contents of middle leaves and upper leaves.Therefore soil water deficit effectively inhibited the nitrogen metabolism at mature stage. |
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| Keywords: | water deficit flue-cured tobacco high nitrogen nutrition photosynthetic characteristics nitrogen metabolism |
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