| 引用本文: | 王鹏宇,刘婧然,张廷强,等.基于DSSAT模型的广西地区甘蔗亏缺灌溉优化[J].灌溉排水学报,0,():-. |
| WANG Pengyu,LIU Jingran,ZHANG Tingqiang,et al.基于DSSAT模型的广西地区甘蔗亏缺灌溉优化[J].灌溉排水学报,0,():-. |
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| 摘要: |
| 【目的】制定优化灌溉策略是合理分配水资源的前提,也是解决广西地区灌溉用水短缺问题和农业可持续性发展的重要举措。【方法】本文通过DSSAT模型来模拟甘蔗在五个不同季节生育期限水的灌溉敏感性,来研究对产量、水分利用效率(WUE)和灌溉水利用效率(IWUE)的影响。进而提出了一种优化阶段灌溉量的亏缺灌溉策略。【结果】实验的模拟结果表明在广西的气候和土壤条件下,甘蔗早期和成熟期适当的减少灌溉量,促进了WUE和IWUE的提升,产量差异不明显；而茎伸长期和冠层发育后期的差异最为显著,在与50 mm灌溉量相同处理的情况中,该时期灌溉在10、20、30、40 mm处产量分别降低1.02、0.92、1.05、0.84；结合敏感性实验结果, 算法优化的灌溉策略对比未优化的灌溉策略在季节限水为120 mm和160 mm处产量提升显著,分别为4.5%、6.8%,WUE除了40 mm的季节限水外,均优于非优化灌溉策略。【结论】本文研究结果对原有季节限水的田间灌溉提出了新的指导方法,并可以用来解决在广西地区种植甘蔗的亏缺灌溉的优化问题。 |
| 关键词: DSSAT模型;甘蔗;亏缺灌溉;优化方法 |
| DOI： |
| 分类号:S274.1 |
| 基金项目:国家自然科学(61440001) |
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| Optimization of Deficit Irrigation Method Based on DSSAT Model for Sugarcane in Guangxi |
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WANG Pengyu, LIU Jingran, ZHANG Tingqiang, LIU Xin
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Hebei University of Engineering
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| Abstract: |
| 【Objective】 Rational allocation of water resources and optimal irrigation strategy are important measures to solve the problem of sustainable development of sugarcane under limited irrigation water in Guangxi.【Method】 In this paper, the DSSAT model is used to simulate the irrigation sensitivity of sugarcane in five different seasons, then study the impact on yield, water use efficiency (WUE) and irrigation water use efficiency (IWUE). Furthermore, a deficit irrigation strategy for optimizing the amount of irrigation in the stage is proposed.【Result】The simulation results showed that the appropriate reduction of irrigation in the early and maturity stages of sugarcane promoted the increase of WUE and IWUE, but the difference of the yield was not obvious. The difference was most significant at the stage of elongation stage and the late stage of canopy development. the difference between the stem elongation period and the late canopy development period is the most significantly, in the case of the same treatment as the 50 mm irrigation amount, the yield at 10, 20, 30, and 40 mm irrigation during this period decreased by 1.02, 0.92, 1.05, 0.84. Combined with the results of sensitivity experiments, an optimal deficit irrigation strategy was proposed. The optimal results showed that the yield increased significantly at the seasonal water limit of 120 mm and 160 mm by 4.5% and 6.8%. WUE was superior to non-optimal irrigation except for seasonal water limitation of 40 mm.【Conclusion】In conclusion, the results of this paper provide a new guidance method for field irrigation with limited water in season, which can be used to solve the problem of deficit irrigation for sugarcane planting in Guangxi. |
| Key words: DSSAT model; sugarcane; deficit irrigation; optimal method |
