| Effect of CO2 Concentration on Nitrogen Metabolism of Winter Wheat |
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| 引用本文： | MEN Zhong-hua LI Sheng-xiu. Effect of CO2 Concentration on Nitrogen Metabolism of Winter Wheat[J]. 中国农业科学(英文版), 2005, 4(8): 601-608 |
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| 作者姓名： | MEN Zhong-hua LI Sheng-xiu |
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| 作者单位： | [1]College of Resources and Environment Sciences, Northwest A＆F University, Yangling 712100, P.R.China [2]College of Life Science, Inner Mongolia University of Science and Technology, Baotou 014030, P.R. China |
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| 基金项目： | 国家自然科学基金，国家自然科学基金，国家自然科学基金，国家重点基础研究发展计划(973计划) |
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| 摘 要： | Hoagland＇s solution was used as water culture medium to study the effect of CO2 concentration on nitrate metabolism of wheat under natural light and light-shaded conditions. NO3^-N, NH4^＋-N, nitrate reductase activity, total uptake N by wheat plants during solution cultural period and total N in plants were determined for comprehensive evaluation of the effect. Results showed that under both natural light and light-shaded conditions, addition of CO2 increased NO3^-N uptake and its assimilative capabilities by plants. However, there were some difference between shoots and roots. With increase of CO2 concentration, the concentration of NO3^-N and NH4^＋-N as well as nitrate reductase activity were all decreased for shoots while the difference was not so distinct in roots, and the nitrate reductase activity was not decreased, but increased. Since NO3^-N uptake by plants from the solution and the total N in plants were much higher by CO2 addition, it may be concluded that addition of CO2 has resulted in rise of nitrate absorption, assimilation and metabolism of wheat.
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| 关 键 词： | 冬小麦 氮 CO2 浓度 水温 吸收能力 |
Effect of CO2 Concentration on Nitrogen Metabolism of Winter Wheat |
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| MEN Zhong-hua,LI Sheng-xiu. Effect of CO2 Concentration on Nitrogen Metabolism of Winter Wheat[J]. 《Agricultural Sciences in China》, 2005, 4(8): 601-608 |
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| Authors: | MEN Zhong-hua LI Sheng-xiu |
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| Abstract: | Hoagland's solution was used as water culture medium to study the effect of CO2 concentration on nitrate metabolism of wheat under natural light and light-shaded conditions. NO3-N, NH4+-N, nitrate reductase activity, total uptake N by wheat plants during solution cultural period and total N in plants were determined for comprehensive evaluation of the effect.Results showed that under both natural light and light-shaded conditions, addition of CO2 increased NO3-N uptake and its assimilative capabilities by plants. However, there were some difference between shoots and roots. With increase of CO2concentration, the concentration of NO3-N and NH4+-N as well as nitrate reductase activity were all decreased for shoots while the difference was not so distinct in roots, and the nitrate reductase activity was not decreased, but increased. Since NO3-N uptake by plants from the solution and the total N in plants were much higher by CO2 addition, it may be concluded that addition of CO2 has resulted in rise of nitrate absorption, assimilation and metabolism of wheat. |
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| Keywords: | CO2 concentration Winter wheat Water culture Nitrogen metabolism |
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