اثرخراش دهی اسیدی و سرما روی جوانه زنی بذر سه گونه درختی فضای سبز

Subject Areas : Journal of Ornamental Plants

بهاره دل طلب ¹ , نیره نظیری مقدم ² , مجتبی خرمی راد ³ , بهزاد کاویانی ⁴

1 - دانشجوی دکتری تخصصی اکولوژی کشاورزی، دانشگاه رازی، کرمانشاه، ایران
2 - گروه علوم باغبانی، واحد رشت، دانشگاه آزاد اسلامی، رشت، ایران
3 - مدرسه علوم اکوسیستم و جنگل، دانشکده علوم، دانشگاه ملبورن، کرسویک، استرالیا
4 - گروه علوم باغبانی، واحد رشت، دانشگاه آزاد اسلامی، رشت، ایران

Received: 2022-11-10 Accepted : 2023-05-28 Published : 2023-06-01

Keywords: پرایمینگ, خفتگی بذر, خراش‌دهی, درختان جنگلی, استقرار گیاه,

Abstract :

جوانه‌زنی بذر برخی گونه‌های چوبی به دلایل مختلف از جمله خفتگی فیزیولوژیکی و مکانیکی و حضور ترکیبات ممانعت‌کننده در بافت‌های بذر با مشکل و در میزان پایین انجام می‌شود. پرایمینگ یکی از مهم‌ترین تیمارها برای افزایش ظرفیت جوانه‌زنی بذرها است. هدف این مطالعه، بررسی اثر تیمارهای مختلف چینه سرمایی و اسید سولفوریک روی رشد و درصد جوانه‌زنی بذرهای اقاقیا، عرعر و زبان گنجشک بود. این پژوهش به صورت فاکتوریل در قالب طرح بلوک کامل تصادفی با دو عامل؛ گیاه و چینه سرمایی در چهار تکرار انجام شد. نتایج نشان داد که بالاترین درصد جوانه‌زنی (72 درصد) در تیمار اسید سولفوریک 50 درصد روی بذرهای اقاقیا و پایین‌ترین آن (18 و 12 درصد)، به ترتیب در تیمارهای شاهد و اسید سولفوریک 95 درصد روی بذرهای زبان گنجشک به دست آمد. نتایج کلی این پژوهش نشان داد که بهترین تیمار چینه سرمایی برای اغلب صفات اندازه‌گیری‌شده، اسید سولفوریک 50 درصد و سرمای سه درجه سانتی‌گراد به مدت 20 روز بود.

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