中国水稻科学

中国水稻科学

• 研究报告 • 上一篇    下一篇

水分胁迫和供氮形态耦合作用下分蘖期水稻的光合速率、水分与氮素利用

周毅;郭世伟*;宋娜;张磊;沈其荣*   

  1. 南京农业大学 资源与环境科学学院, 江苏 南京 210095; *通讯联系人, E-mail:sguo@njau.edu.cn; shenqirong@njau.edu.cn
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2006-05-10 发布日期:2006-05-10

Effects of Nitrogen Form and Water Stress Interaction on Photosynthesis,Utilization of Water and Nitrogen of Rice Plants at the Tillering Stage

ZHOU Yi , GUO Shi-wei , SONG Na , ZHANG Lei , SHEN Qi-rong
  

  • Received:1900-01-01 Revised:1900-01-01 Online:2006-05-10 Published:2006-05-10

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被引次数

104

摘要： 采用室内营养液培养及PEG模拟水分胁迫的方法，在3种供氮形态\[NH4+、NO3-、NH4+/NO3-(质量比)为50∶50\]下，主要研究分蘖期水稻在非水分胁迫及水分胁迫条件下的氮素利用效率及对不同形态氮素的消耗。在非水分胁迫条件下，分蘖期水稻在NH4+/NO3-为50∶50时生物量增量最大；而在水分胁迫条件下，单一供NH4+N营养的水稻生物量增量最大。在两种水分条件下，当NH4+/NO3-为50∶50时，分蘖期水稻对营养液中NO3-N的消耗量明显大于NH4+N；此外，在两种水分条件下，均以单一供NH4+N营养水稻的光合速率、氮素利用率和水分利用率最高。

关键词: 氮素形态, 水分胁迫, 分蘖期, 水稻, 光合作用, 氮素利用率, 水分利用率

Abstract: By using the method of nutrient solution culture and simulated water stress (by adding PEG6000), the effects of different nitrogen forms (NO3-, NH4+, and the ratio of NO3- to NH4+ is 50∶50) and water stress interaction on nitrogen use efficiency and the characteristics of nitrogen consumption of rice plants at the tillering stage were studied. Under non-water stress, the increased biomass of rice plants under the mixed supply of nitrate and ammonium was higher than that under the other two sole nitrogen supply. However, under water stress, the increased biomass of rice plants under sole ammonium supply was the highest. The photosynthetic rate, nitrogen use efficiency and water use efficiency of rice plants supplied with sole ammonium were higher than those of the other two treatments under the two water regimes. Furthermore, under the mixture supply of nitrate and ammonium, nitrate consumption was higher than ammonium consumption of rice plants at the tillering stage regardless of water regimes.

Key words: nitrogen form, water stress, tillering stage, rice, photosynthesis, nitrogen use efficiency, water use efficiency