| Cite this article: | 薛静,李旭强,陈军锋,等.不同降水年型下春玉米适宜秋浇模式的模拟研究[J].灌溉排水学报,0,():-. |
| xuejing,lixuqiang,chenjunfeng,et al.不同降水年型下春玉米适宜秋浇模式的模拟研究[J].灌溉排水学报,0,():-. |
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| Simulation of Suitable Autumn Irrigation Modes for Spring Maize under Different Precipitation Years |
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xuejing, lixuqiang, chenjunfeng, zhengxiuqing, chenxiaoyu
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Taiyuan University of Technology
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| Abstract: |
| 【Background】Hetao Irrigation District(HID) of Inner Mongolia is the largest designed irrigation area in China. It is an important grain and oil base in the west and an important ecological barrier in the north. It is a typical arid irrigated area, and its agricultural production is almost completely dependent on the irrigation of Yellow River. Therefore, it is particularly important to rationally utilize the water resources of the Yellow River in the new era to realize the high-quality development of HID. In order to ensure the normal growth of crops in this area and the continuous improvement of yield and quality, the irrigation area has gradually explored a kind of irrigation system with salt dripping after autumn and moisture preserving in spring autumn irrigation in the production practice over the years. Therefore, in order to maintain the sustainable development of agriculture, in the case of limited water resources, to improve crop water productivity (WP) for the purpose of formulating a reasonable autumn irrigation system, to lay a solid foundation for the sustainable development of ecological agriculture in irrigated areas.【Objective】Autumn irrigation is a kind of salt and soil conservation irrigation in HID to meet the suitable water and salt conditions of spring sowing crops in the following year. It is of great significance to discuss the suitable autumn irrigation mode of spring maize in HID under different precipitation years for saving irrigation amount of yellow diversion and ensuring grain production. 【Method】In this study, the Shahaoqu experiment station in HID was taken as an example. Based on the collected field measured data, parameter rate determination and verification of SWAP-WOFOST model were carried out,and the model after utilization ratio determination analyze the relatively appropriate autumn irrigation mode of spring maize with different precipitation years during 1987-2017. 【Result】The results showed that the SWAP-WOFOST model can well simulate the dynamics of soil moisture, salt and temperature as well as crop growth in the experiment station. In order to improve the water productivity of spring maize, the relative suitable autumn irrigation quota under different precipitation years is 200 mm, the autumn irrigation time in wet years and normal years is recommended to be September 30 and October 30 in dry years. 【Conclusion】The results obtained by numerical simulation can provide a reference for the establishment of a relatively suitable autumn irrigation modes for spring maize in different precipitation years. |
| Key words: autumn irrigation modes; SWAP-WOFOST model; precipitation year pattern; water productivity |
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