DSSAT模式模擬水稻生長之參數最佳化與應用

PARAMETERS OPTIMIZATION AND APPLICATION OF DSSAT MODEL FOR PADDY RICE GROWTH SIMULATION

任菀翎(Wan-Ling Ren) ； 葉一隆(Yi-Lung Yeh)

《農業工程學報》 67卷4期 (2021/12) Pp. 29-41

https://doi.org/10.29974/JTAE.202112_67(4).0002

摘要

水稻灌溉可透過不同灌溉期距與灌溉水深來達到節水效果，因灌溉期距之調整會影響灌溉總用水量及水稻產量。本文選用農業委員會農田水利署嘉南管理處（原臺灣嘉南農田水利會）灌溉技術推廣中心之滲漏計試驗區於2018年及2019年一期作之試驗資料，水稻品種為台南11號，探討以DSSAT模式來模擬水稻生長之作物品種參數最佳化值，再依評估結果參數分析不同灌溉期距對水稻產量與節水率之影響。本文使用擴展傅立葉幅度檢驗法（Extended Fourier Amplitude Sensitivity Test, EFAST）建立試驗區之模式作物品種參數值，利用灰關聯分析來評估坵塊之參數最佳組合，再將作物品種參數進行檢定。由分析結果顯示臺南11 號品種參數P1、P2R、P5、P2O、G1、G2、G3與G4分別為643.1、123.4、531.2、11.26、37.99、0.026、1.501與1.065。對於灌溉期距調整對產量與節水率影響分析，以灌溉期距3天之總灌溉水深為基礎，比較灌溉期距為3天至13天之水稻產量與節水率之影響，由分析結果顯示灌溉期距為8天時，其產量可增加8.47 %，節水率達56.77 %。

關鍵字

水稻 ； DSSAT模式 ； 灌溉期距 ； 灰關聯分析 ； 擴展傅立葉幅度檢驗

並列摘要

Traditional paddy field irrigation mainly uses flood irrigation and achieves water-saving effects through different irrigation intervals and irrigation water depths. The adjustment of irrigation intervals affects irrigation water consumption and rice yield. In this study, 12 blocks of lysimeter obtained from the Irrigation Technology Extension Center of Chia-Nan Management Office, Irrigation Agency, Council of Agriculture (former Taiwan Chia-Nan Irrigation Association) in 2018 and 2019 were selected. The study analyzed the optimized parameter of the Decision Support System for Agrotechnology Transfer (DSSAT) model and further assessed the impacts of different irrigation intervals on rice. The Extended Fourier Amplitude Sensitivity Test (EFAST) method was used to establish the parameter values of the model crop varieties of the 12 plots in the lysimeter test area. The optimal parameter combination of each plot was analyzed using grey relational analysis. The crop variety (Tainan 11) parameters were tested, and the average value was the best. The crop variety parameters P1, P2R, P5, P2O, G1, G2, G3, and G4 were 643.1, 123.4, 531.2, 11.26, 37.99, 0.026, 1.501, 1.065, respectively. The different irrigation interval water depths were compared with the total irrigation water depth of 3 days, and the optimal rice yield was obtained when the irrigation interval was 8 days. The rice yield rate was increased by 8.47%, with 56.77% savings in water.

並列關鍵字

Paddy field ； DSSAT model ； Irrigation periods ； Grey correlation analysis ； Extended Fourier amplitude sensitivity test

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