| Cite this article: | 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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| 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 |
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