بررسی عملکرد مدل‌های AquaCrop و CERES-Maize در برآورد اجزای بیلان آب خاک و عملکرد ذرت

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناس ارشد آبیاری و زهکشی دانشگاه آزاد اسلامی، واحد علوم و تحقیقات تهران، گروه مهندسی آب

2 استادیار دانشگاه آزاد اسلامی، واحد علوم و تحقیقات تهران، گروه مهندسی آب

3 استاد پژوهشی مرکز تحقیقات فنی و مهندسی کشاورزی کرج

4 دانشیار دانشگاه آزاد اسلامی، واحد علوم و تحقیقات تهران، گروه مهندسی آب

چکیده

اهمیت آب در کشاورزی در کنار رشد روز‌افزون جمعیت و ضرورت تأمین غذای مورد نیاز، استفادة بهینه از منابع آب را ضرورت می‌بخشد. مدلAquaCrop ، ارائه‌شده از سوی سازمان خواربار جهانی، از مدل‌های شبیه‌ساز رشد گیاهی است که سعی می‌کند با استفاده از کاهش تعداد دادة ورودی سهولت کاربری این نرم‌افزار را افزایش دهد. در این مطالعه، علاوه بر واسنجی و صحت‌سنجی مدل AquaCrop برای گیاه ذرت در منطقة کرج، با استفاده از روش بیلان آب خاک، عملکرد مدل با مدل تخصصی گیاه ذرت (CERES-Maize) مقایسه شد. نتایج نشان‌ داد عملکرد هر دو مدل مناسب است؛ طوری که شاخص توافق برای مدل AquaCrop در برآورد محتوای آب خاک بین 85 تا 94 درصد و برای مدل CERES-Maize بین 58 تا 64 درصد متغیر است. شاخص RMSE در برآورد عملکرد محصول برای مدل AquaCrop بین 20 تا 40 درصد و برای مدل CERES-Maize بین 20 تا 80 درصد بود. در نهایت مدل AquaCrop، با توجه به نتایج خروجی، برای استفادة کشاورزان و برنامه‌ریزان در سطح منطقه توصیه می‌شود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Evaluation of the AquaCrop and CERES-Maize Models in Assessment of Soil Water Balance and Maize Yield

نویسندگان [English]

  • Ghazaleh Ziaii 1
  • Hossein Babazadeh 2
  • Fariborz Abbasi 3
  • Feridon Kaveh 4
1 M.Sc. Graduated, Water Eng. Dept., Science and Research Branch, Islamic Azad University, Tehran, Iran
2 Assistant Professor, Water Eng. Dept., Science and Research Branch, Islamic Azad University, Tehran, Iran
3 Research Professor, Agricultural Engineering Research Institute, Karaz, Iran
4 Associated Professor, Water Eng. Dept., Science and Research Branch, Islamic Azad University, Tehran, Iran
چکیده [English]

Importance of fresh water in agriculture along with the essential demand of the growing population for food, indicates an extreme necessity of the optimum use of water. To this end, plant growth simulation models have been introduced in agricultural sciences to reach maximum yields in varying climates. Variations in the of developed models cause difficulties for the unprofessional users. The AquaCrop model, which is developed by FAO is one of the plant growth simulation models which tries to improve the facility of the model by reducing the number of input data. Throughout the present study, the AquaCrop model was calibrated and validated for maize in Karaj region by due attention to soil water balance. Moreover, the results were compared with CERES-Maize as a specific maize growth simulation model. The results indicated an appropriate function of both models in predicting yield and as well in soil water balance parameters. The figures 85-94 constituted the index of agreement for the AquaCrop model in soil water simulation as compared with the figures within 58-64 for CERES-Maize model. RMSE figures in yield simulation for the AquaCrop model stood within 40-20%, although for CERES-Maize they varied from 20 to 80%. Finally, and as regards the accuracy of the AquaCrop model, it is a recommendable one to farmers, and to planners in Karaj region.

کلیدواژه‌ها [English]

  • AquaCrop
  • CERES-Maize
  • soil water balance
  • maize yield

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