| Cite this article: | 姚婷月,王怡宁,石磊韬,等.基于叶面积指数和气象因子修正双作物系数法估算夏玉米蒸散量[J].灌溉排水学报,0,():-. |
| yaotingyue,Wang Yining,Shi Leitao,et al.基于叶面积指数和气象因子修正双作物系数法估算夏玉米蒸散量[J].灌溉排水学报,0,():-. |
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(in Chinese with English abstract)
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yaotingyue1, Wang Yining2, Shi Leitao1, NiMaZaXi3, Zhou Chao4, Juqin5, Wang Zhenlong''4
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1.Hohai University;2.Nanjing Hydraulic Research Institute;3.Ali Hydrology and Water Resources Sub-Bureau of Hydrology and Water Resources Survey of Tibet Autonomous Region，Xizang;4.Water Resources Research Institute of Anhui Province;5.State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China
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| Abstract: |
| 【Objective】To estimate crop transpiration(Tr) and soil evaporation(Es) of summer maize, 【Method】thisstudy based on the recommended by FAO-56 dual crop coefficient model, used leaf area index (LAI), meteorological factors and soil water measured data of Wudaogou Hydrological Experimental Station to dynamically modify the base crop coefficient (Kcb) and soil evaporation coefficient(Ke) in the model. Based on the Penman-Monteith(P-M) model, the reference crop evapotranspiration(ET0) was determined, and then the actual evapotranspiration (ETc) of summer maize was estimated. The applicability of the simulated values was evaluated based on the measured ETc by large scale lysimeter in 2018 and 2019. 【Result】The results showed that the modified dual crop coefficient method is more precise in estimating summer maize evapotranspiration, and the daily mean values of the estimated and measured values of the whole growth period of summer maize in 2018 were 4.89 mm/d and 4.66mm/d, and in 2019 were 5.72 and 5.67mm/d. R^2、RMSE、E_ns and AAE in 2018 were 0.89, 0.98mm/d, 0.86 and 0.73mm/d, respectively, in 2019 were 0.89, 0.76mm/d, 0.89 and 0.58mm/d. 【Conclusion】Therefore, the modified dual crop coefficient method is more precise in estimating summer maize evapotranspiration, and this study can provide effective guidance for the precise management of farmland water in Huaibei Plain. |
| Key words: evapotranspiration estimation; dual crop coefficient method; leaf area index; meteorological factors; summer maize; lysimeter |
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