ارزیابی عکسالعمل ذرت دانهای به مدیریت کم آبیاری با استفاده از مدل SWAP
الموضوعات : اکوفیزیولوژی گیاهان زراعیابراهیم امیری 1 , فهیمه شیرشاهی 2
1 - دانشگاه آزاد اسلامی واحد لاهیجان
2 - دانشگاه آزاد اسلامی، واحد اراک، باشگاه پژوهشگران جوان و نخبگان، اراک، ایران.
الکلمات المفتاحية: عملکرد, آبیاری قطرهای, شیراز, ذرت دانهای, SWAP,
ملخص المقالة :
به منظور بررسی عکس العمل رقم هیبرید ذرت دانه ای (سینگل کراس 260) تحت شرایط تیمارهای آبیاری قطره ای در استان فارس در سال های 1390 و 1391، آزمایشی در مزرعه دانشگاه آزاد اسلامی واحد شیراز انجام گرفت. چهار سطح آبیاری به ترتیب 20، 40، 60 و 80 درصد تخلیه رطوبتی در نظر گرفته شدند و آزمایش در قالب طرح بلوک های کامل تصادفی اجرا شد. از داده های اندازه گیری شده شاخص سطح برگ، ماده خشک کل، عملکرد دانه و بیوماس کل در سال 1390 برای واسنجی و در سال 1391 برای صحت سنجش مدل سواپ (SWAP) استفاده شد. نتایج نشان داد که روند کلی تغییرات عملکرد شبیه سازی شده توسط مدل در مدیریت های مختلف آبیاری بر روند تغییرات عملکرد به دست آمده در مزرعه مطابقت دارد. با مقادیر برآورد شده شاخص های آماری، ضریب تبیین بیشتر از 9/0، آزمون تی بزرگ تر از 05/0 و مجذور میانگین مربعات خطای نرمال شده (RMSEn) بین 9/1 تا 9/6، کارآیی خوب مدل سواپ (SWAP) در برآورد عملکرد دانه و بیوماس کل به دست آمد.
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