اثر تکنیک های مختلف پرایمینگ بر شاخص های جوانه زنی و قدرت بذر آفتابگردان (Helianthus annuus)

نوع مقاله: علمی پژوهشی

نویسندگان

1 دانشجوی دکتری، دانشگاه آزاد اسلامی، دانشکده کشاورزی، واحد تبریز، گروه زراعت و اصلاح نباتات، تبریز، ایران

2 دانشگاه آزاد اسلامی، دانشکده کشاورزی، واحد تبریز، گروه زراعت و اصلاح نباتات، تبریز، ایران

چکیده

      به منظور مطالعه تأثیر تیمارهای مختلف بذر بر جوانه زنی آفتابگردان، آزمایشی در دو مرحلهآزمایشگاهی و گلخانه ای به صورت طرح کاملاً تصادفی با سه تکرار در آزمایشگاه و با چهار تکرار در مرکز تحقیقات دانشکده کشاورزی دانشگاه آزاد اسلامی واحد تبریز در سال 1391 اجرا شد. تیمارهای مورد بررسی شامل تابش امواج اولتراسونیک با حداکثر 3 وات بر سانتی­متر مربع و اشعه گاما و بتا با شدت ثابت2 میکروکوریل به مدت 10دقیقه، لیزر با طول موج 6328 آنگستروم و میدان مغناطیسی (با شدت 40 میلی تسلا) در سه تیمار زمان 5،10 و 15 دقیقه روی بذرهای خیس، هیدروپرایمینگ به مدت 24 ساعت و شاهد بودند. نتایج نشان داد بیشترین درصد جوانه زنی نهایی مربوط به تیمار بذر با اشعه لیزر 10 دقیقه (برابر 33/98 %) اختصاص داشت. وقتی بذور بعد از هیدروپرایمینگ کشت شدند، طول گیاهچه نسبت به شاهد آب مقطر حدود 99% افزایش نشان داد. بیشترین شاخص ویگور به تیمار میدان مغناطیسی 5 دقیقه اختصاص یافت. وقتی بذور آفتابگردان بعد از تیمار با میدان مغناطیسی 15 دقیقه کشت شدند، وزن خشک ساقه آن نسبت به تیمارشاهد با آب مقطر حدود 121% افزایش نشان داد. در حالی که کمترین آن مربوط به تیمار اشعه گاما (16/12گرم) محاسبه شد. نتایج به دست آمده حاکی از آن است که افزایش محصول در تیمارهای تشعشات فیزیکی مشاهده شده است.

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