| 氮素营养对干旱地区小麦光合生理的影响 |
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| 引用本文： | 周凌云,李卫民.氮素营养对干旱地区小麦光合生理的影响[J].土壤通报,2003,34(3):195-197. |
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| 作者姓名： | 周凌云 李卫民 |
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| 作者单位： | 中国科学院南京土壤研究所,江苏,南京,210008 |
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| 基金项目： | 国家重点基础发展规划项目(G1999011803)和自然科学基金(49890330)资助 |
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| 摘 要： | 对不同供氮条件下小麦光合速率、蒸腾速率、细胞间隙CO2浓度的分析表明,土壤水分胁迫下,细胞间隙CO2浓度日变化则呈"W"型,叶片光合速率和蒸腾速率日变化均呈单峰型,光合峰值出现在上午10:00前后,蒸腾峰值则出现在上午11:00前后;土壤水分胁迫下,过多施用氮肥可使作物细胞间隙CO2浓度下降,显著抑制叶片蒸腾和光合速率,合适的施氮量应保持在90kg/hm2左右。
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| 关 键 词： | 小麦 氮素 光合速率 蒸腾速率 细胞间隙 CO2浓度 |
| 文章编号： | 0564-3945(2003)03-0195-03 |
| 修稿时间： | 2002年1月30日 |
Effects of Nitrogen on Photosynthesis of Wheat Plant in a Dryland |
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| ZHOU Ling-yun,LI Wei-min.Effects of Nitrogen on Photosynthesis of Wheat Plant in a Dryland[J].Chinese Journal of Soil Science,2003,34(3):195-197. |
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| Authors: | ZHOU Ling-yun LI Wei-min |
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| Abstract: | To gain the suitable nitrogen supply of wheat under soil water stress, an experiment was conducted on net photosynthetic rate(Pn), transpiration rate(E), intercellular CO2 concentration(Cint) of wheat with different nitrogen regimes in a dry land. The experiment showed that: the daily varying curve of Cint is "W" and the daily varying curves of Pn and E are "∧". Peaks of Pn and E appeared in the morning (9∶00～12∶00).Under soil water stress, increasing nitrogen supply could suppress Pn, E and Cint. The nitrogen supply of 90 kg·hm-2 was suitable. |
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| Keywords: | Wheat Nitrogen nutrition Net photosynthetic rate Transpiration rate Intercellular CO2 concentration |
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