پژوهش حاضر بهمنظور تخمین پارامترهای مدل SSM-iCrop2 و ارزیابی کارآیی آن در پیشبینی رشد و نمو عدس (Lens culinaris Medik.) انجام شد. بهمنظور جمعآوری دادههای لازم برای واسنجی و ارزیابی مدل، آزمایشهایی بهصورت اسپلیت فاکتوریل در قالب طرح پایه بلوکهای کامل تصادفی با سه تکرار در مزرعه تحقیقاتی پردیس کشاورزی و منابع طبیعی دانشگاه رازی و شهرستان ازنا طی سالهای زراعی 1400 و 1401 اجرا گردید. تیمارها شامل رژیم آبیاری (بدون آبیاری، یک بار آبیاری در مرحله گلدهی و دو بار آبیاری در مراحل گلدهی و پُر شدن دانه) بهعنوان عامل اصلی، تاریخ کشت (27 بهمن، 9 اسفند، 21 اسفند برای کرمانشاه و 6، 16 و 24 اسفند برای ازنا) و رقم (بیله سوار، کیمیا و گچساران) بهعنوان فاکتور فرعی بود. نتایج واسنجی مدل حاکی از دقت مناسب مقادیر پارامترهای گیاهی بهکاررفته در ساختار مدل بود که منجر به پیشبینی بسیار دقیق ویژگیهای رشد و عملکرد شد. نتایج ارزیابیها نشان از دقت قابل قبول SSM-iCrop2 در شبیهسازی روند تغییرات مراحل نموی و عملکرد دانه ارقام در تیمارهای مورد بررسی داشت. مقدار RMSE مرحله نموی روز از کاشت تا رسیدگی فیزیولوژیک در کرمانشاه برای ارقام بیله سوار، کیمیا و گچساران بهترتیب 5.2، 5.2 و 4.3 روز و در ازنا بهترتیب 12.9، 12.5 و 11.8 روز بود. مقدار RMSE عملکرد دانه در کرمانشاه از 4.1 تا 15.2 و ازنا از چهار تا هفت گرم در مترمربع بود. بنابراین میتوان از مدلSSM-iCrop2 برای بررسی وضعیت مدیریت زراعی و تجزیه و تحلیل رشد و عملکرد عدس در شرایط کرمانشاه و ازنا استفاده کرد.
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