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Position: Home > Articles > A study on the water use efficiency in leaves and on field scale for winter wheat Journal of Gansu Agricultural University 2012,47 (1) 79-83

冬小麦叶片水分利用效率和光合速率研究

作  者:
马莉;王长荣;王博欣;施坰林
单  位:
甘肃农业大学工学院;酒泉职业技术学院
关键词:
冬小麦;CO2通量;净光合速率;水分利用率
摘  要:
以北京大兴实验站冬小麦为研究对象,依据涡度相关系统和光合测定仪实测数据,分析了冬小麦在叶片和农田尺度上的水分利用率变化特征,并探讨了净光合速率与CO2通量之间的关系.研究发现:冬小麦田间CO2通量与净光合速率在抽穗期最大,拔节期、开花期和灌浆期相差不大;作物水分利用效率的日变化规律在农田尺度和叶片尺度基本相似,即早8∶00~10∶00最大,分别为0.015g/g和0.006g/g,14∶00~18∶00基本稳定,分别为0.006g/g和0.004g/g,20∶00以后水分利用效率接近零.
译  名:
A study on the water use efficiency in leaves and on field scale for winter wheat
作  者:
MA Li1,WANG Chang-rong2,WANG Bo-xin1,SHI Jiong-lin1(1.College of Technology,Gansu Agricultural University,Lanzhou 730070,China; 2.Jiuquan Vocational Technical College,Jiuquan 735000,China)
关键词:
winter wheat;CO2 flux;net photosynthetic rate;water use efficiency
摘  要:
The variation of water use efficiency in leaves and on field scale for winter wheat was analyzed based on data collected by the eddy covariance system and photosynthesis analyzer at Beijing Daxing Experiment Station.The relationship between net photosynthesis and CO2 flux was also discussed.Results showed that winter wheat had the highest net photosynthetic rate and CO2 flux at heading stage,but no differences in those parameters at jointing,flowering and filling periods.The daily water use efficiency on field scale was similar to that in leaves,i.e.the highest at 8∶00~10∶00(0.015 and 0.006 g/g),stable during 14∶00~18∶00(0.006 and 0.004 g/g) and approaching zero after 20∶00.

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