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امیر رضا صادقی بختوری بهمن پاسبان اسلام نسترن حاجی زاده اصل

چکیده

به‌منظور بررسی اثر پرایمینگ و تنش کم‌آبی بر رشد و عملکرد آفتابگردان آجیلی (Helianthus annuus L.) آزمایشی در دانشگاه شهید مدنی آذربایجان به‌صورت فاکتوریل در قالب طرح بلوک­های کامل تصادفی با سه تکرار در تابستان 1393 اجرا شد. تیمارهای آزمایش شامل فاکتور پرایمینگ در چهار سطح (آب با نیتروکسین، آب با اکسین، آب مقطر (شاهد) و بدون پرایمینگ) و فاکتور تنش کم‌آبی در سه مرحله (ساقه رفتن، پر شدن دانه و شاهد (بدون تنش در کل دوره رشد)) بودند. نتایج آزمایش نشان داد که تمامی صفات مورد بررسی تحت تأثیر اثرات اصلی پرایمینگ و تنش کم‌آبی قرار گرفتند. پیش تیمار کردن بذرها سبب افزایش معنی­داری در سرعت رشد مطلق بوته و طبق، قطر طبق، تعداد دانه در طبق، وزن هزار دانه، عملکرد دانه و نسبت مغز دانه به کل دانه و کاهش درصد دانه­های پوک در طبق شد. اما تنش کم‌آبی باعث کاهش تمامی صفات، به‌جز درصد دانه­های پوک گردید. تنش کم‌آبی در مرحله پر شدن دانه باعث بیشترین کاهش عملکرد دانه در بوته در واحد سطح گردید. بیشترین مقدار عملکرد دانه در پرایمینگ آب با نیتروکسین به دست آمد. نتایج کلی این تحقیق، بیانگر این بود که پرایمینگ کردن بذور باعث کاهش اثرات سوء تنش کم‌آبی از طریق تحريك رشد و تقسيم سلولي و افزایش بنیه اولیه گیاهچه شده و همچنین می­تواند در افزایش اجزای عملکرد و عملکرد آفتابگردان آجیلی عاملی مؤثر برای دستیابی به کشاورزی پایدار باشد.

جزئیات مقاله

کلمات کلیدی

پیش¬تیمار بذر, تنش رطوبتی, عملکرد دانه

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ارجاع به مقاله
صادقی بختوریا. ر., پاسبان اسلامب., & حاجی زاده اصلن. (۱۳۹۸-۰۱-۰۶). بررسی اثرات پرایمینگ و تنش کم‌آبی بر رشد و عملکرد آفتابگردان آجیلی (Helianthus annuus L.). بوم شناسی کشاورزی, 10(3), 747-764. https://doi.org/10.22067/jag.v10i3.58044
نوع مقاله
علمی - پژوهشی

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