| Analysis of water\|saving potential of summer maize in Ta’e Basin based on AquaCrop model |
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| DOI：10.7606/j.issn.1000-7601.2024.02.16 |
| Key Words: summer maize water\|saving potential AquaCrop model Ta’e basin |
| Author Name | Affiliation | | REN Congzhe | College of Water Conservancy & Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China
Key Laboratory of Modern Water\|Saving Irrigation of Xinjiang Production & Construction Group, Shihezi, Xinjiang 832000, China | | FAN Wenbo | College of Water Conservancy & Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China
Key Laboratory of Modern Water\|Saving Irrigation of Xinjiang Production & Construction Group, Shihezi, Xinjiang 832000, China | | QIAO Changlu | College of Water Conservancy & Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China
Key Laboratory of Modern Water\|Saving Irrigation of Xinjiang Production & Construction Group, Shihezi, Xinjiang 832000, China | | WANG Shiwei | College of Water Conservancy & Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China
Key Laboratory of Modern Water\|Saving Irrigation of Xinjiang Production & Construction Group, Shihezi, Xinjiang 832000, China | | LI Shunshun | College of Water Conservancy & Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China
Key Laboratory of Modern Water\|Saving Irrigation of Xinjiang Production & Construction Group, Shihezi, Xinjiang 832000, China | | LIU Yu | College of Water Conservancy & Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China
Key Laboratory of Modern Water\|Saving Irrigation of Xinjiang Production & Construction Group, Shihezi, Xinjiang 832000, China |
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| Abstract: |
| Based on the AquaCrop model, combined with the measured data of summer maize in the Ta’e Basin in 2021-2022, the conservative parameters of the model and the standard water productivity (WP*) and the reference harvest index (HI0) of the yield module were calibrated and verified. Through the setup of a three\|factor crossover test of initial irrigation time, irrigation quota, and irrigation cycle, the yield of summer maize was simulated, and the degree to which its yield and crop water use efficiency were affected by irrigation quota and initial irrigation time was analyzed. The optimal irrigation scheme was selected under the premise that both yield and crop water use efficiency were higher values. Taking the actual summer maize sown area as a reference value, the summer maize yield and total water\|saving under different irrigation schemes in 2022 and the next four years were simulated and predicted, and the water\|saving potential of summer maize in Ta’e Basin was analyzed accordingly. The results showed that: (1) The parameter rates of the main parameters of the crop growth module, the soil water stress parameters and the yield module parameters WP* and HI0 of the AquaCrop model were determined, and the final parameters of the yield module were selected as WP*=35 g·m-2 and HI0=43%, and the relative error values of the yield simulations were 1.26% in 2021 and 1.07% in 2022, respectively. (2) Combined with the model simulation, the recommended optimal irrigation scheme is as follows: the starting irrigation time is May 20; the irrigation quota is 470 mm; the irrigation period is 7 days; the irrigation period is 11 times; the crop water\|use efficiency is 2.005 kg·m-3, and the yield is 9.423 t·hm-2. (3) Taking 2022 as the current level year, the water saving can be realized in the current level year and future level years (2022-2025) under the optimal irrigation scheme, and the water saving amounts are 2.1338×105, 2.1826×105, 2.1992×105 m3 and 2.2306×105 m3, respectively. |
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