شبیه‌سازی عملکرد دانه و کارایی مصرف آب در ارقام غالب ذرت تحت شرایط محدودیت آب و تغییر اقلیم

بوم شناسی کشاورزی

مقاله 7، دوره 13، شماره 1 - شماره پیاپی 47، فروردین 1400، صفحه 103-115   

نوع مقاله: علمی - پژوهشی

شناسه دیجیتال (DOI): 10.22067/jag.v13i1.80923

نویسندگان

ندا شریفی حداد¹؛ رضا دیهیم فرد^{* 2}؛ امید نوری²؛ سجاد رحیمی مقدم³

¹گروه کشاورزی اکولوژیک، پژوهشکده علوم محیطی، دانشگاه شهید بهشتی، ایران.

²گروه کشاورزی اکولوژیک، پژوهشکده علوم محیطی، دانشگاه شهید بهشتی، ایران

³گروه زراعت و اصلاح نباتات، دانشکده کشاورزی، دانشگاه لرستان، ایران.

چکیده

به‌منظور شبیه­سازی عملکرد و کارایی مصرف آب در ارقام ذرت آزمایشی تحت شرایط تغییر اقلیم و محدودیت آب در استان خوزستان (مناطق اهواز، ایذه، دزفول و بستان) طراحی شد. اقلیم آینده (2070-2040) در این مناطق با استفاده از مدل گردش عمومی Miroc5، تحت سناریوی اقلیمی RCP4.5 و روشAgMIP  پیش­بینی شد. همچنین از مدل APSIM برای شبیه­سازی رشد و نمو گیاه ذرت در دوره گذشته (2010-1980) و آینده (2070-2040) استفاده گردید. نتایج نشان داد که به‌طور متوسط عملکرد دانه و کارایی مصرف آب ذرت در استان خوزستان در آینده نسبت به گذشته به‌ترتیب 2- و 7/5- درصد کاهش و میانگین دما در طول فصل رشد و تبخیر و تعرق 6/12+ و 9/0+ درصد افزایش خواهد داشت. به‌علاوه نتایج نشان داد که اگر کشاورزان یک آبیاری مناسب (آبیاری 10 دور) به‌کار ببرند، این موضوع باعث افزایش کارایی مصرف آب (42 درصد) و کاهش تبخیر و تعرق (8/3 درصد) خواهد شد. این سطح بهینه آبیاری در دوره آینده به‌همراه یک رقم دیررس (سینگل کراس 704) می­تواند بهترین نتیجه را در استان خوزستان از نظر عملکرد دانه (26/7999 کیلوگرم در هکتار) و کارایی مصرف آب (94/16 کیلوگرم بر میلی‌متر در هکتار) داشته باشد.

کلیدواژه‌ها

تبخیر- تعرق؛ رژیم آبیاری؛ مدل APSIM

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