| 引用本文: | 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,2021,(6):80-87. |
| XUE Jing,LI Xuqiang,CHEN Junfeng,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,2021,(6):80-87. |
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| 摘要: |
| 【目的】探讨不同降水年型下灌区春玉米适宜的秋浇模式。【方法】以河套灌区沙壕渠试验站为例，基于所收集的田间实测数据对SWAP-WOFOST模型进行了参数率定和验证，并利用率定验证后的模型分析了1987—2017年不同降水年型下春玉米相对适宜的秋浇模式。【结果】模型能够较好地模拟试验站的土壤含水率、含盐量和温度的动态变化以及作物生长状况。以提高春玉米的水分生产力为目标，不同降水年型下相对适宜的秋浇定额均为200 mm。【结论】丰水年和平水年适宜的秋浇时间建议在9月30日前后；枯水年适宜的秋浇时间则建议选在10月30日前后。 |
| 关键词: 秋浇；模型；春玉米；降水年型；水分生产力 |
| DOI：10.13522/j.cnki.ggps.2020466 |
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| Suitable Irrigation Scheduling for Spring Maize under Different Annual Precipitation Patterns in Hetao Irrigation District |
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XUE Jing, LI Xuqiang*, CHEN Junfeng, ZHENG Xiuqing, CHEN Xiaoyu
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Taiyuan University of Technology, Taiyuan 030024, China
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| Abstract: |
| 【Background】Hetao irrigation district in Inner Mongolia is the largest managed irrigation district in China. As a major grain and oil production base in western China, its agriculture relies on irrigation using water taken from the Yellow River. With available water for diversion from the river dwindling, improving irrigation water use efficiency has become increasingly important to sustain crop production in this region. One technology developed over the past few years is to use the saline groundwater as a complementary water resource in the after-autumn irrigation, with the spring and autumn irrigations using the river water. The efficacy of such alternate irrigations depends on intra-annual precipitation.【Objective】The purpose of this paper is to study a suitable autumn irrigation scheduling for spring maize in that it meets the requirement of the crops sown in the following spring by moistening the soil while in the meantime keeping soil salinity not exceeding a threshold value.【Method】The experiment was conducted at Shahaoqu experiment station in the district. Data measured from the fields were used to calibrate the SWAP-WOFOST model, and the calibrated model was then used to compare different autumn irrigation schedules for spring maize based on precipitation data measured from 1987 to 2017.【Result】The SWAP-WOFOST model can accurately simulate the dynamics of soil moisture, soil salt and temperature, as well as crop growth. The results indicated that in order to improve water productivity of the spring maize, the most suitable autumn irrigation amount was 200 mm, regardless of annual precipitations. We also found that the irrigation time needs to vary with precipitation pattern, started on 30 September in wet and normal years and on 30 October in dry years.【Conclusion】The SWAP-WOFOST model was able to simulate crop growth under different salt and water conditions, and can thus be used to help design irrigation scheduling for spring maize under different annual precipitation patterns in Hetao irrigation district and beyond. |
| Key words: autumn irrigation; SWAP-WOFOST model; spring maize; annual precipitation; water productivity |
