| 不同供水条件对冬小麦光合特性及水分利用效率的影响 |
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| 引用本文： | 王博欣,刘钰,蔡甲冰,施坰林.不同供水条件对冬小麦光合特性及水分利用效率的影响[J].灌溉排水学报,2012(2):69-72. |
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| 作者姓名： | 王博欣 刘钰 蔡甲冰 施坰林 |
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| 作者单位： | 甘肃农业大学工学院;中国水利水电科学院流域水循环模拟与调控国家重点实验室 |
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| 基金项目： | 国家自然科学基金项目(50909098;51009151);国家863计划项目(2011AA100509-03);中国水科院专项(节集1209) |
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| 摘 要： | 研究了不同土壤水分状况下植物叶片光合速率和水分利用特性对环境变化的响应,分别在固定CO2浓度和光强下,测定了2种供水强度条件下灌浆期冬小麦旗叶光合速率对光强和CO2浓度的响应。结果表明,高水分处理(CK)与低水分处理(WS)的光响应曲线差异较小,而CO2响应曲线差异显著;气孔导度和蒸腾速率均随CO2浓度升高而降低,WS处理反应较CK处理敏感;CK的水分利用效率略高于WS,但差别不大,低度水分胁迫不会对冬小麦水分利用的生理机制产生严重影响。
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| 关 键 词： | 冬小麦 光响应曲线 CO2响应曲线 蒸腾作用 水分利用效率 |
The Photosynthetic Characteristics and Water Use Efficiency of Winter Wheat in Different Water Supply Conditions |
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| Institution: | WANG Bo-xin1,2,LIU Yu2,CAI Jia-bing2,SHI Jiong-lin1(1.College of Engineering,Gansu Agricultural University,Lanzhou 730070,China; 2.State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research,Beijing 100083,China) |
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| Abstract: | In the paper,photosynthetic response to light intensity and CO2 concentration of flag leaf in winter wheat under different water treatments was studied in filling stage.And different water controls were designed for no water stress(CK) and water stress(WS).Results showed that there was no difference in photosynthetic parameters between CK and WS treatments.However,there was significant difference in CO2 response curves.Stomata conductance and transpiration both decreased as CO2 concentration increased and WS is more sensitive than CK.Water use efficiency of CK was slightly higher than that of WS,which indicated that low water stress has not make much effect on physiological mechanism of winter wheat. |
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| Keywords: | winter wheat light response curve CO2 response curve transpiration water use efficiency |
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