Evaluation of AquaCrop model in soybean cultivation under different planting dates and deficit irrigation treatments

Document Type : Research Paper

Author

1-Department of Water Engineering, Kashmar Higher Education Institute, Kashmar, I. R. Iran 2-Department Agricultural Engineering Research Department, Golestan Agricultural and Natural Resources Research and Education Center, AREEO, Gorgan, I. R. Iran

Abstract

Water stress has been identified as the major effective factor on soybean production growth in semi-arid regions. Planting date and irrigation management are the most important agronomic practices, which affect soybean growth and economic yield production. Today, to assess the impacts of destructive environmental stresses, calibrated models can be used to simulate and evaluate the growth of the crops under different scenarios. In this research, the AquaCrop model was evaluated for simulation of soybean yields and water productivity on varying irrigation levels and planting dates in northeast of Iran. For this purpose, root mean square error (RMSE), model efficiency (E), coefficient of determination (R2), and prediction error (p e) were applied to test the model performance. The calibrated AquaCrop model predicted soybean grain yield and biomass for all treatments with the prediction error statistics 0.27<RMSE-1, 5.1
e<5.6%, 0.91<R2-1 ha-1, R2 of 0.88, and p e of 7.6%. Subsequently, validation results were 0.93<E<0.96; 0.92<R2-1 for grain and biomass yield, respectively. The soybean yields and growth response to different irrigation water management and planting dates was adequately predicted by the AquaCrop model. Overall, the AquaCrop model is a suitable support tool for decision
makers to simulate WP, grain yield (GY), and biomass (Bi) in soybean cultivation under various field managementin semi-arid environment.

Keywords

Article Title [Persian]

ارزیابی مدل AquaCrop برای گیاه سویا تحت تاریخ های مختلف کاشت و کم آبیاری

Author [Persian]

  • میثم عابدین پور
1گروه علوم و مهندسی آب، مرکز آموزش عالی کاشمر، کاشمر، ج. ا. ایران 2گروه آبیاری و زهکشی، بخش تحقیقات فنی و مهندسی کشاورزی، مرکز تحقیقات
Abstract [Persian]

تنش آبی به عنوان یکی از مهم ترین عامل مؤثر بررشد و تولید سویا در مناطق نیمه خشک بشمار می رود. تاریخ کاشت و مدیریت آبیاری از کلیدی ترین عملیات زراعی است که بر رشد سویا و تولید محصول اقتصادی تأثیر فراوانی دارد. امروزه، جهت بررسی تأثیرات مخرب تنش های محیطی، از مدل های واسنجی شده برای شبیه سازی و ارزیابی رشد محصولات زراعی تحت سناریوهای مختلف استفاده می شود. در این تحقیق، دقت مدل AquaCrop با استفاده از داده های 2 ساله مزرعه ای درسطوح مختلف آبیاری و تاریخ کاشت در شمال شرقی ایران مورد بررسی قرار گرفت. برای ارزیابی کارآیی مدل از میانگین میانگین مربعات خطای ریشه (RMSE)، راندمان مدل (E)، ضریب تعیین (R2) و خطای پیش بینی (Pe) استفاده شد. در مرحله واسنجی مدل AquaCrop عملکرد دانه سویا و زیست توده را برای کلیه تیمارها با خطای0.27

Keywords [Persian]

  • واسنجی
  • مدیریت آبیاری
  • تاریخ کاشت
  • سویا
  • اعتبارسنجی

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Iran Agricultural Research
Volume 39, Issue 2
December 2020
Pages 37-46

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