| 引用本文: | 彭记永,李树岩,方文松.0 引言1 材料和方法[J].灌溉排水学报,0,():-. |
| PENG Jiyong,LI Shuyan,FANG Wensong.0 引言1 材料和方法[J].灌溉排水学报,0,():-. |
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| 摘要: |
| 为确定夏玉米倒伏后农田蒸散量变化特征，针对郑州农业气象试验站2016年8月25日出现的一次夏玉米大风倒伏过程，利用正常年（2017年）气象数据、作物观测数据和涡度观测数据，通过Penman-Monteith模型（P-M模型）模拟并检验夏玉米正常生长年型蒸散量变化特征，优化参数模型，计算P-M模型模拟值与实测值的最优拟合度。然后根据率定参数的P-M蒸散模型，利用田间调查数据，以未倒伏的植株参数为假定夏玉米没有发生倒伏，进行农田蒸散量模拟，模拟结果作为蒸散量对照值（P-MN）；以实际倒伏后的植株参数，进行农田蒸散量模拟，模拟结果为实际倒伏蒸散量（P-ML）。结果表明，正常年型蒸散量模拟值与实测值具有较好的一致性，模拟绝对误差0.005，相对误差分别为10.7%，均方根误差和一致性指数分别为0.019、0.98，说明模型具有较好的预测性。在倒伏年，倒伏后蒸散量模拟值与实测值的绝对误差和相对误差分别为0.002mm·30min-1，2.9%；均方根误差为0.001，一致性指数为0.98。根据P-M模型计算结果，夏玉米倒伏后农田蒸散量降低0.019mm·30min-1，日平均降低0.68mm·d-1，降低18.3%。并且倒伏前期日平均降低0.99 mm·d-1，降低20.6%；倒伏后期日平均降低0.42 mm·d-1，降低14.8%。 |
| 关键词: 夏玉米倒伏；Penman-Monteith模型；涡度相关；模拟；蒸散量 |
| DOI： |
| 分类号:210 |
| 基金项目:中国气象局农业气象保障与应用技术重点实验室基金(AMF202106)；中国气象局创新发展专项(CXFZ2021Z094) |
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| Effect of lodging on Evapotranspiration at milk ripening stage of Summer Maize |
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PENG Jiyong1,2, LI Shuyan1,2, FANG Wensong1,2
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1.CMA·2.Henan Agrometeorological Support and Applied Technique Key Laboratory
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| Abstract: |
| In order to determine the variation characteristics of farmland evapotranspiration after summer maize lodging. In view of a strong wind lodging process of summer maize at Zhengzhou agrometeorological station on August 25, 2016. Based on the meteorological data, crop observation data and vorticity observation data in normal years (2017), the variation characteristics of evapotranspiration in normal growth years of summer maize were simulated and tested by Penman-Monteith model (P-M model), the parameter model is optimized, and the optimal fit between the simulated value of P-M model and the measured value were calculated. Then, according to the P-M model with calibration parameters, using the field survey data and assuming that summer maize not lodging, the farmland evapotranspiration was simulated, and the simulation results were used as the control value of evapotranspiration (P-MN); Based on the actual lodging plant parameters, the farmland evapotranspiration was simulated, and the simulation result was the actual lodging evapotranspiration (P-ML). The results showed that the simulated value of normal annual evapotranspiration was in good agreement with the measured value. The simulated absolute error was 0.005, the relative error was 10.7%, and the root mean square error and consistency index were 0.019 and 0.98 respectively, indicating that the model had good predictability. In the lodging year, the absolute and relative errors between the simulated and measured evapotranspiration after lodging were 0.002mm·30min-1 and 2.9%, respectively; the root mean square error was 0.001 and the consistency index was 0.98. According to the calculation results of P-M model, after summer maize lodging, farmland evapotranspiration decreased by 0.019mm·30min-1, daily average decreased by 0.68mm·D-1, 18.3%. In the early stage of lodging, the daily average decreased by 0.99 mm·D-1, 20.6%; In the later stage of lodging, the daily average decreased by 0.42 mm·D-1, 14.8%. |
| Key words: Summer maize Lodging; Penman-Monteith Model; Eddy covariance; Simulated；Evapotranspiration |
