| 供氮对旱作小麦环境适应性的影响 |
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| 引用本文： | 李卫民,周凌云.供氮对旱作小麦环境适应性的影响[J].土壤通报,2002,33(6):414-416. |
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| 作者姓名： | 李卫民 周凌云 |
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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)和国家自然科学基金项目(49890330)资助. |
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| 摘 要： | 微区试验结果表明,土壤水胁迫下,增施氮肥可显著提高同一温、湿度下的水分利用率,提高叶片光合对高温的抵抗能力,扩大光合适应的湿度范围。供氮量为90kg/hm2时,可使小麦保持较高的光合速率和水分利用率。
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| 关 键 词： | 氮素 小麦 光合速率 水分利用率 气温 湿度 |
| 文章编号： | 0564-3945(2002)06-0414-03 |
| 修稿时间： | 2001年12月23 |
Effects of Nitrogen Supply on Wheat Adaptation to Environment in Dry Land |
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| Abstract: | To evaluate the effects of nitrogen supply on wheat adaptation to environment with soil water stress, responses of net photosynthetic rate and water use efficiency under different air temperature and humidity are reported here. Increasing nitrogen application significantly improved the water use efficiency under the same air temperature and humidity. Elevated nitrogen supply increased the ability of wheat to high air temperature and humidity. Net photosynthetic rate and water use efficiency of the nitrogen level 90 kg/hm2 were higher than other levels. |
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| Keywords: | Nitrogen Wheat Net photosynthetic rate Water use efficiency Air temperature Air humidity |
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