| 摘要: |
| 【目的】通过优化冠层阻力模型参数，建立适合天津地区估算夏玉米蒸散量的冠层阻力模型，为该地区预测农业耗水量和提高水分利用效率提供科学依据。【方法】采用波文比-能量平衡法、水量平衡法以及Katerji-Perrier（KP）模型估算冠层阻力模型的方法，以天津静海区农作物夏玉米为研究对象，估算夏玉米的蒸散量，验证KP模型估算的蒸散量在该地区的适用性。【结果】利用Katerji-Perrier模型与反演Penman-Monteith公式中计算得出的冠层阻力在玉米的整个生育期具有相似的变化规律，通过修正KP模型中校正系数得出该地区系数a为1.99、b为2.22，模拟精度达0.98，模型得出的ETk与ETB和ETk与ETS 值拟合度分别为0.83和0.85，精度较高。【结论】Katerji-Perrier模型适合估算该地区的玉米蒸散量。 |
| 关键词: 蒸散量；Penman-Monteith模型；夏玉米；冠层阻力模型 |
| DOI： |
| 分类号:S275.6 |
| 基金项目:“十二五”国家科技支撑计划项目（2013BAD05B08） |
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| Estimation of evapotranspiration of summer maize under drip irrigation based on canopy resistance model |
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huangmingrui, Xue Zhu
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Tianjin Agricultural University
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| Abstract: |
| Abstract:【Objective】By optimizing the parameters of the canopy resistance model, a canopy resistance model suitable for estimating summer corn evapotranspiration in Tianjin is established, which provided a scientific basis for predicting agricultural water consumption and improving water used efficiency in this area.【Method】Used bowen ratio energy balance method, water balance method and Katerji-Perrier (KP) model to estimate the canopy resistance model, summer maize in Jinghai district of Tianjin was taken as the research object to estimate the evapotranspiration of summer maize, and verify the applicability of the evapotranspiration estimated by KP model in this area.【Result】The canopy resistance calculated by Katerji-Perrier model and inversed Penman-Monteith formula had a similar change law in the whole growth period of maize. By modifying the correction coefficient of KP model, the regional coefficient A and B were 1.99 and 2.22, and the simulation accuracy was 0.98. The simulation degree of λET and ET valued obtained by the model is 0.83 and 0.85.【Conclusion】Katerji-Perrier model is suitable for estimating evapotranspiration in this area. |
| Key words: Evapotranspiration; Summer maize; Katerji-Perrier model; Penman Monteith model |
