| Cite this article: | 黄铭锐,薛铸.基于冠层阻力模型的滴灌夏玉米蒸散量估算[J].灌溉排水学报,0,():-. |
| huangmingrui,Xue Zhu.基于冠层阻力模型的滴灌夏玉米蒸散量估算[J].灌溉排水学报,0,():-. |
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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 |
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