شبیه‌سازی تأثیر مدیریت آب آبیاری بر عملکرد، زیست توده و کارآیی مصرف آب گیاه کلزا (.Brassica napus L) با استفاده از مدل AquaCrop

محورهای موضوعی : اکوفیزیولوژی گیاهان زراعی

افسانه غلامی ¹ , اصلان اگدرنژاد ^{2 *} , نیازعلی ابراهیمی پاک ³

1 - دانشجوی کارشناسی ارشد آبیاری و زهکشی، گروه علوم و مهندسی آب، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران
2 - استادیار، گروه علوم و مهندسی آب، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران
3 - دانشیار، بخش آبیاری و فیزیک خاک، موسسه تحقیقات خاک و آب، سازمان تحقیقات، آموزش و ترویج کشاورزی،کرج، ایران

تاریخ دریافت : 1400/02/29 تاریخ پذیرش : 1400/11/12 تاریخ انتشار : 1402/03/01

کلید واژه: تنش آبی, کلزا, مدل‌سازی گیاهی, ‌کم‌آبیاری,

چکیده مقاله :

پژوهش حاضر به منظور ارزیابی مدل گیاهی AquaCrop در شبیه‌سازی عملکرد، زیست‌توده و کارآیی مصرف آب کلزا تحت مقادیر مختلف آبیاری (E1، E2، E3 و E4 به ترتیب نشان دهنده تأمین آب به میزان 50، 75، 100 و 125 میلی‌متر از تشت تبخیر) در سه سال زرعی (Y1، Y2 و Y3 به ترتیب نشان دهنده سال‌های اول، دوم و سوم) انجام شد. به منظور واسنجی این مدل از داده‌های برداشت شده از سال اول زراعی و برای صحت‌سنجی مدل از داده‌های سال دوم و سوم استفاده شد. نتایج نشان داد که مدل AquaCrop برای شبیه‌سازی هر سه پارامتر مورد مطالعه دچار خطای بیش‌برآوردی شد (0‌>‌MBE). دقت این مدل برای شبیه‌سازی عملکرد و زیست‌توده عالی (1/0< NRMSE) و برای شبیه‌سـازی کارآیی مصـرف آب خوب (0.2< NRMSE )< 0.1 ) بود. میانگین اختلاف بین عملکرد، زیست‌توده و کارآیی مصرف آب شبیه‌سازی شده و مشاهداتی به ترتیب برابر با 0.19 تن در هکتار، 0.78 تن در هکتار و0.05 کیلوگرم بر مترمکعب بود. براساس این نتایج، استفاده از این مدل برای شبیه‌سازی عملکرد، زیست توده و کارآیی مصرف آب گیاه کلزا قابل پیشنهاد است.

چکیده انگلیسی:

The aims of this study is evaluate AquaCrop in simulating rapeseed yield, biomass and water use efficiency under different irrigation amounts (E1, E2, E3 and E4, indicating water supply of 50, 75, 100 and 125 mm from the evaporation pan, respectivly) was performed in three cropping years (Y1, Y2 and Y3 representing the first, second and third years, respectively). In order to calibrate this model, the data collected from the first year used for calibration and data for the second and third year were used for validation. The results showed that AquaCrop had an overestimated error (MBE< 0) to simulate all three parameters studied. The accuracy of AquaCrop was excellent for simulating yield and biomass (NRMSE <0.1) and good for water use efficiency (NRMSE <0.2). The mean differences between simulated and observed yield, biomass and water use efficiency water were 0.19 t.ha-1, 0.78 t.ha-1 and 0.05 kg.m-3, respectively. Based on the results, use of AquaCrop to simulate rapeseed yield, biomass and water use efficiency is recommended.

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