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مهدی مجاب مجتبی حسینی مجید کریمیان کلیشادرخی

چکیده

قیاق یکی از مهمترین علف¬های¬هرز مسئله¬ساز در دنیا است. پاسخ جوانه¬زنی و سبز شدن آن به فاکتورهای مختلف محیطی در شرایط آزمایشگاه و گلخانه مورد ارزیابی قرار گرفت. نتایج نشان داد که، خیساندن بذور به مدت 30 دقیقه در اسید سولفوریک غلیظ (98-95 درصد) بهترین تیمار برای شکستن خواب بذر می¬باشد. پاسخ جوانه¬زنی در دو رژیم نوری (روشنایی/تاریکی و تاریکی مداوم) همراه با دامنه دمایی متفاوت ( ثابت و متناوب) یکسان بود. این گیاه در دماهای متناوب 15/25، 20/30 و 25/35 در هر دو رژیم نوری بیش از 95 درصد جوانه¬زنی داشته است. در دمای ثابت نیز روند درصد نهایی جوانه¬زنی مشابه دماهای متناوب بود و این صفت در محدوده¬ی دماهای ثابت 25 تا 45 بیش از 90 درصد جوانه¬زنی داشت. نتایج آزمایش شوری و خشکی نشان داد این گونه به شوری و خشکی مقاوم است؛ به¬طوری¬که، پتانسیل اسمزی و ماتریک لازم جهت کاهش حداکثر 50 درصد جوانه¬زنی بر اساس برازش مدل لجستیک سه پارامتری به¬ترتیب 62/9- و 13/9- بار محاسبه گردید. با افزایش عمق کاشت ظهور دانه¬رست به طور معنی¬داری کاهش یافت. بر اساس مدل برازش داده شده عمقی که باعث کاهش 50 درصد حداکثر سبزشدن دانه¬رست می¬شود 86/5 سانتی¬متر تعیین گردید.

جزئیات مقاله

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ارجاع به مقاله
مجابم., حسینیم., & کریمیان کلیشادرخیم. (2017). بررسی بعضی از عوامل اکولوژیکی جوانه¬زنی بذر علف¬هرز قیاق (Sorghum halepense (L.) PERS.). مطالعات حفاظت گیاهان, 31(3), 433-444. https://doi.org/10.22067/jpp.v31i3.55442
نوع مقاله
علمی - پژوهشی

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