| Cite this article: | 梁永辉,王振华,宋利兵,等.基于CERES-Maize模型对新疆滴灌玉米灌溉制度的优化[J].灌溉排水学报,0,():-. |
| Liang Yonghui,Wang Zhenhua,Song Libing,et al.基于CERES-Maize模型对新疆滴灌玉米灌溉制度的优化[J].灌溉排水学报,0,():-. |
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| Optimization of drip irrigation schedule for maize in xinjiang based on CERES-Maize model |
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Liang Yonghui, Wang Zhenhua, Song Libing, Zhu Yan, Meng Yu, Ma Zhanli
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Shihezi University
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| Abstract: |
| 【Objective】We aimed to study the irrigation schedule and water demand regularity of maize under mulched drip irrigation, and to provide scientific guidance for achieving water saving and yield increasing of maize in Xinjiang.【Method】Based on the growth and yield data of maize under four different irrigation levels in 2020, the DSSAT-CERES-Maize model was calibrated and verified to evaluate the applicability of the model in Xinjiang. According to meteorological data from 1979 to 2017, we set up 14 different irrigation schemes in typical years, and explored the optimal irrigation schedule of maize under mulched drip irrigation in Xinjiang.【Result】The CERES-Maize model was calibrated and verified using the observed values of leaf area index, dry matter weight, and yield of maize under four different irrigation levels. The simulations and measured values showed good consistency for leaf area index, dry matter weight, and yield. The simulation performance was great. Through model simulation analysis, the sensitivity of key water demand periods for maize to water shortage in different meteorological years was as follows: tasseling period>jointing period>filling period. Comprehensively considering the yield and water use efficiency, the irrigation amount for maize in tasseling period were 180 mm, 180 mm, and 120 mm in dry years, normal years, and wet years, respectively. The irrigation amount was 120 mm in the filling period, and the irrigation amount was 60 mm during the other growth periods. The yield under the optimized irrigation schedule accounted for 99.53%, 97.51%, and 98.45% relating to the highest yield in dry years, normal years, and wet years, respectively.【Conclusion】The CERES-Maize model can be applied to the research of drip irrigation maize in Xinjiang. The optimized irrigation schedule by the model can provide some reference for the cultivation of drip irrigation maize in Xinjiang. |
| Key words: drip irrigation maize; CERES-Maize model; irrigation schedule; yield; water use efficiency |
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