ارزیابی مدل‌های گیاهی AquaCrop و WOFOST در شبیه‌سازی عملکرد و بهره‌وری آب چغندرقند تحت دورهای مختلف آبیاری و تنش کودی

نوع مقاله : مقاله پژوهشی

نویسندگان

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

چکیده

دور آبیاری و مقدار کود مصرفی از جمله عوامل مهمی هستند که اثر زیادی بر عملکرد چغندرقند دارند. این تحقیق به منظور ارزیابی دو مدل WOFOST و AquaCrop در شبیه­سازی عملکرد و بهره­وری آب چغندرقند در ایستگاه تحقیقاتی فیض آباد شهرستان قزوین در سه سال زراعی انجام شد. بدین منظور، مدیریت آبیاری در چهار دور (6، 9، 12 و 15 روز) و سطوح کود بُر در سه سطح (21، 30 و 39 کیلوگرم در هکتار؛ به ترتیب نشان دهنده سطوح کم، متوسط و مناسب) به کار برده شدند. نتایج آماره‌ RMSE به منظور ارزیابی نتایج عملکرد مدل گیاهی WOFOST و AquaCrop نسبت به داده‌های واقعی به ترتیب برابر با 29/0 و 07/1 تن در هکتار بود. نتایج آماره‌ی RMSE برای بهره­وری آب توسط دو مدل WOFOST و AquaCrop به ترتیب برابر با 61/0 و 14/0 کیلوگرم بر مترمکعب بود. خطای شبیه‌سازی عملکرد توسط مدل‌های WOFOST و AquaCrop برای تیمارهای آبیاری به ترتیب بین 50/3-87/2 و 26/2-91/1 تن بر هکتار و برای تیمارهای کودی به ترتیب بین 51/4-34/2 و 94/2-14/1 تن در هکتار متغیر بود. خطای این دو مدل برای شبیه‌سازی بهره­وری آب برای تیمارهای آبیاری به ترتیب بین 48/0-34/0 و 38/0-16/0 کیلوگرم بر مترمکعب و برای تیمارهای کودی بین 56/0-30/0 و 41/0-15/0 کیلوگرم بر متر مکعب به دست آمد. بنابراین در شرایط تفکیک تیمارهای آبیاری، مدل AquaCrop دقت بهتری نسبت به WOFOST داشت. در حالت کلی دقت مدل WOFOST  خوب  بود، لیکن براساس نتایج به دست آمده، با احتیاط پیشنهاد می‌شود از مدل WOFOST برای شبیه‌سازی چغندرقند در شرایط شبیه‌سازی تیمارهای آبیاری به همراه کود مصرفی استفاده شود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Evaluation of AquaCrop and WOFOST for Simulation of Sugar Beet Yield and Water Productivity under Different Irrigation Intervals and Fertilizer Stress

نویسندگان [English]

  • Hassan Sayyahi 1
  • Aslan Egdernezhad 2
  • Niazali Ebrahimipak 3
1 M.Sc. Student of Irrigation and drainage, Department of Water Sciences and Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran.
2 Assistant Professor, Department of Water Sciences and Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran.
3 Associated professor, Department of irrigation and soil physics, Soil and Water Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran.
چکیده [English]

Irrigation interval and fertilizer amount have an important effect on sugar beet yield. This study was conducted to evaluate AquaCrop and WOFOST models in terms of simulation of sugar beet yield and water productivity at Qazvin agricultural research station during three years. For this purpose, two treatments were considered; irrigation water management in four levels (6, 9, 12; and 15 days) and Boron fertilizer amount in three levels (21, 30 and 39 kgha-1; as low, medium and proper amounts, respectively). RMSE values for yield simulated by WOFOST and AquaCrop models were 0.29 and 1.07 ton.ha-1, respectively. RMSE values for water productivity simulated by the proposed methods were 0.61 and 0.14 kg.m-3,, respectively. RMSE values for yield simulated by WOFOST and AquaCrop for irrigation treatments were in the range of 2.78-3.50 and 1.91-2.26 ton.ha-1, respectively, and for fertilizer treatments were in the range of 2.34-4.51 and 1.14-2.94 26 ton.ha-1, respectively. The amount of error for water productivity simulated by WOFOST and AquaCrop models for irrigation treatments were in the range of 0.34-0.48 and 0.16-0.38 kg.m-3, respectively, and for fertilizer were in the range of 0.30-0.56 and 0.15-0.41 kg.m-3, respectively. Thus, AquaCrop model had better accuracy compared to WOFOST model for separated treatments. In general, WOFOST accuracy was good. According to the results, it is recommended by caution to use WOFOST model to simulate sugar beet in the simulation of irrigation treatments with fertilizer.

کلیدواژه‌ها [English]

  • Water Use Efficiency
  • Fertilizer Stress
  • Crop Modeling

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تحقیقات آب و خاک ایران
دوره 51، شماره 10
دی 1399
صفحه 2593-2605

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