بررسی روشهای مختلف شکست خواب بر ویژگیهای جوانهزنی بذر علفهرز خردل‌وحشی (Sinapis arvensis L.)
محورهای موضوعی : تکنولوژی بذر
لیلی نباتی سوها
1
,
محمدتقی آل ابراهیم
2
,
فاطمه احمدنیا
3
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علی بابائی قاقلستانی
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1 - دانش آموخته کارشناسی ارشد گروه زراعت و اصلاح نباتات، دانشکده کشاورزی و منابع طبیعی دانشگاه محقق اردبیلی، اردبیل، ایران
2 - استاد گروه زراعت و اصلاح نباتات، دانشکده کشاورزی و منابع طبیعی، دانشگاه محقق اردبیلی، اردبیل.
3 - دانشجوی دکتری، گروه زراعت و اصلاح نباتات، دانشکده کشاورزی و منابع طبیعی دانشگاه محقق اردبیلی، اردبیل ، ایران
4 - دانشجوی دکتری، گروه زراعت و اصلاح نباتات، دانشکده کشاورزی و منابع طبیعی دانشگاه محقق اردبیلی، اردبیل ، ایران
کلید واژه: سرعت جوانهزنی, اسید سولفوریک, ظهور گیاهچه, التراسونیک, سرمادهی,
چکیده مقاله :
یک گام مهم در کنترل علف‌های‌هرز شناسایی ویژگیهای اکوفیزیولوژیک بذر این گیاهان است. به منظور بررسی روشهای مختلف شکست خواب بذر خردل‌وحشی (Sinapis arvensis L.) آزمایشی در قالب طرح کاملأ تصادفی با سه تکرار در سال 1398 در دانشکده کشاورزی و منابع طبیعی دانشگاه محقق اردبیلی اجرا شد. تیمارهای آزمایشی شامل تیمار شاهد، سرمادهی مرطوب، غوطه‌ور‌سازی در محلول‌های جیبرلیک اسید با چهار غلظت 500، 1000، 1500 و 2000 قسمت در میلیون به مدت 24 ساعت، غوطه‌ور‌سازی در محلول سولفوریک اسید غلیظ (98 درصد) به مدت 1، 2 و 3 دقیقه و قرار دادن بذرها در التراسونیک به مدت 10، 20 و 30 دقیقه بود. نتایج نشان داد که صفات اندازه گیری شده تحت تأثیر تیمارهای آزمایشی قرار گرفتند. جیبرلیک اسید 1500 قسمت در میلیون دارای بیشترین تأثیر بر جوانهزنی و مؤلفه‌های رشدی اندازه‌گیری شده بود. در مقایسه با تیمار شاهد، جیبرلیک اسید 1500 قسمت در میلیون، 80 درصد جوانهزنی بذر علفهرز خردل وحشی را افزایش داد. این در حالی بود که در غالب صفات مورد بررسی سولفوریک اسید تأثیر منفی بر جوانهزنی و مؤلفه‌های رشدی داشت. از نتایج چنین استنباط می‌گردد که برخلاف تأثیر مثبت جیبرلیک اسید بر جوانهزنی بذر علفهرز خردل‌وحشی، سولفوریک اسید غلیظ دارای تأثیر مخرب بر آن بوده و می‌تواند به عنوان یکی از روشهای مؤثر در کنترل علف‌های‌هرز مطرح باشد.
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