| 摘要: |
| 【目的】为探明不同处理对夏玉米生长的影响及AquaCrop模型在天津的适应性。【方法】设置四个试验处理：常规滴灌10 mm（N1）、常规滴灌20 mm（N2）、膜下滴灌10 mm（M1）和膜下滴灌20 mm（M2），研究不同灌溉方式和灌水定额对夏玉米生长的影响， 并用2年试验数据对AquaCrop模型进行校验，采用校验后的模型预测平水年不同灌溉方案下的产量，以产量最大为目标筛选最优灌溉方案。【结果】N2处理下的0~40 cm土层的土壤含水率（SWC）均高于N1处理和M2处理；各处理的生物量均值和产量表现为：M2>M1>N2>N1。各处理SWC模拟值与实测值的R2、EF和RMSE分别为0.645~0.907、0.461~0.779和0.021~0.034，冠层覆盖度模拟值与实测值的R2、EF和RMSE分别为0.942~0.992、0.964~0.990和0.463~0.781，生物量模拟值与实测值的R2、EF和RMSE分别为0.959~0.984、0.969~0.986和0.507~0.614 t/hm2，产量模拟值与实测值的RMSE为0.180~0.890 t/hm2，水分利用效率模拟值与实测值的RMSE为0.001~0.003 t/hm2/mm。【结论】常规滴灌下高水较低水处理能提高0~40 cm土层的SWC，灌水20 mm时常规处理在0~40 cm土层的SWC高于覆膜处理；覆膜和高水处理均能提高夏玉米生物量和产量，AquaCrop模型能较好地适应天津市夏玉米生长模拟；最优灌溉方案为苗期灌溉20 mm、抽穗期和灌浆期各灌溉10 mm。 |
| 关键词: AquaCrop模型；夏玉米；土壤含水率；冠层覆盖度；生物量和产量;WUE |
| DOI： |
| 分类号:S523 ,S512 |
| 基金项目:国家自然科学基金项目(51609170)；天津市研究生科研创新项目(2021YJSS135)。 |
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| Research of the Effects of Different Treatments on the Growth of Summer Maize and the Adaptability of AquaCrop Model in Tianjin |
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CHANG Mei, ZHOU Qingyun
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College of Water Conservancy Engineering,Tianjin Agricultural University
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| Abstract: |
| 【Objective】 To explore the effects of different treatments on summer maize growth and AquaCrop model adaptability in Tianjin. 【Methods】 Four test treatments were set: Conventional drip irrigation 10 mm (N1) and 20 mm (N2), under-film drip irrigation 10 mm (M1) and 20 mm (M2), the effects of different conditions on the growth of summer maize were studied; AquaCrop model was verified with two-year experimental data; yield under different irrigation schemes in average year was predicted through verified model, and optimal irrigation scheme was selected with the goal of maximum yield. 【Results】 The SWC of 0~40 cm soil layers under N2 treatment are higher than that of N1 and M2 treatment; biomass and yield under each treatment are as follows: M2>M1>N2>N1; R2, EF and RMSE of simulated and measured SWC values of each treatment are 0.645~0.907, 0.461~0.779 and 0.021~0.034 respectively; R2, EF and RMSE of simulated and measured canopy coverage are 0.942~0.992, 0.964~0.990 and 0.463~0.781 respectively; R2, EF and RMSE of simulated and measured biomass are 0.959~0.984, 0.969~0.986 and 0.507~0.614 t/hm2 respectively; RMSE of simulated and measured yield are 0.180~0.890 t/hm2, RMSE of simulated and measured water use efficiency are 0.001~0.003 t/hm2/mm. 【Conclusion】 Under conventional drip irrigation, the SWC of 0~40 cm soil layer can be improved by high water treatment, and the SWC of 0~40 cm soil layer under conventional treatment is higher than that under film mulching treatment when irrigation is 20 mm; Both film mulching and high water treatment can improve the biomass and yield of summer maize,, and AquaCrop model can better adapt to the growth simulation of summer maize in Tianjin; The optimal irrigation scheme is 20 mm at seedling stage, 10 mm at heading stage and filling stage. |
| Key words: AquaCrop model; Summer maize; Soil water content; Canopy Coverage; Biomass and yield; WUE |
