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中国农学通报

中国农学通报 ›› 2009, Vol. 25 ›› Issue (18): 146-150.

所属专题： 小麦； 农业气象

• 农学 农业基础科学 • 上一篇    下一篇

雨养和灌溉条件下小麦叶片光合特性的比较

王建林   

  • 收稿日期:2009-04-20 修回日期:2009-06-30 出版日期:2009-09-20 发布日期:2009-09-20
  • 基金资助:

    国家自然科学基金

Comparison with photosynthetic characteristic of wheat between precipitation growth and irrigation growth

  • Received:2009-04-20 Revised:2009-06-30 Online:2009-09-20 Published:2009-09-20

PDF (PC)

547

摘要：

摘要：在雨养和灌溉条件下，以小麦品种“青麦6号”为研究对象，对小麦灌浆期旗叶的光合速率、蒸腾速率、气孔导度、水分利用率对光强的响应及各种光合特性指标间相关性进行研究。结果表明：在雨养和灌溉两种处理下光合速率、气孔导度都随光强的增大而增大，都可以用Michaelis-Menten方程模拟；在高光强下灌溉处理的光合速率、气孔导度比雨养处理的高。灌溉处理的蒸腾速率比雨养处理的高，但其水分利用率却低于雨养处理。光合速率与蒸腾速率因气体交换的同步性而具有明显的线性关系，但水分亏缺对蒸腾速率的影响相对于对光合速率的影响更直接、更强烈。

关键词: 桉树人工林, 桉树人工林, Zn, 积累, 生物循环

Abstract:

Abstract：Under precipitation and irrigation condition, we took wheat variety Qingmai 6 as the object of study. Studying the response that rate of photosynthesis and transpiration, stomatal conductance, water use efficiency to light intensity in the wheat filling period, researching the relativity to each photosynthetic characteristics. It showed that photosynthetic rate and stomatal conductance were increasing with the light intensity under precipitation and irrigation conditions, which were all simulated with Michaelis-Menten equation. Photosynthetic rate and stomatal conductance with irrigation treatment were higher than that of precipitation under higher light intensity, transpiration rate with irrigation treatment was higher than that of precipitation, but water use efficiency was lower than that of precipitation. The rate of photosynthesis and transpiration had remarkable linearity relation because of in-phase of gas exchange, but the effect of water lack to transpiration rate was more direct and intense than that to photosynthetic rate.