اثر کاربرد نانو کود پتاسیم روی گیاه مادری بر مولفه‌های جوانه‌زنی بذر و رشد اولیه گیاهچه کینوا (Chenopodium quinoa Willd) تحت تنش آبی
محورهای موضوعی : اکولوژی بذر
محمد میرطیبی
1
,
امین بستانی
2
,
مرجان دیانت
3
,
امیر ازادی
4
1 - دانشجوی دکتری، دانشکده کشاورزی و صنایع غذایی، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات، تهران، ایران
2 - دانشیار دانشگاه شاهد، تهران، ایران
3 - استادیاردانشکده کشاورزی و صنایع غذایی، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات، تهران، ایران
4 - استادیار دانشگاه ازاد اسلامی یادگار امام شهر ری، ایران.
کلید واژه: سرعت جوانه‌زنی, نانو کود پتاسیم, شاخص وزنی بنیه گیاهچه,
چکیده مقاله :
به منظور بررسی اثر تنش خشکی و پیش تیمار با نانو کود پتاسیم بر مولفه‌های جوانه‌زنی بذر کینوا (Chenopodium quinoa Willd) آزمایشی با دو فاکتور تنش خشکی در چهار سطح (شاهد آب مقطر و 3/0-، 6/0- و 9/0- مگاپاسکال) با استفاده از پلی-اتیلن گلایکول و دو نوع بذر حاصل از آزمایش مزرعه‌ای (پیش تیمار شده) در قالب طرح کاملاً تصادفی با چهار تکرار در پتری-دیش اجرا گردید. بدین منظور از دو تیمار آزمایش مزرعه‌ای (1- برای بذور کرت مزرعه‌ای نانو کود پتاسیم دریافت کرده و 2- بذور مزرعه‌ای بدون دریافت نانو کود پتاسیم) نمونه‌ای بذر جمع‌آوری شد. نتایج نشان داد که با افزایش شدت تنش، از درصد جوانه‌زنی بطور معنی‌داری کاسته شد و از 0/91 درصد در تیمار شاهد به 1/77 درصد در شرایط تنش شدید رسید. با افزایش شدت تنش، از ارزش جوانه‌زنی نیز به‌طور معنی‌داری کاسته شد و از 1184در تیمار شاهد به 784 در شرایط تنش شدید رسید. شاخص طولی بنیه گیاهچه نیز از 1411 در تیمار شاهد به 1032 در شرایط تنش شدید رسید. شاخص طولی بنیه گیاهچه در بذر تیمار شده (1204) نسبت به بذر تیمار نشده (1175) برتری معنی‌دار داشت. تفاوت معنی‌داری بین متوسط جوانه‌زنی روزانه بذر تیمار شده (6/11 روز بر بذر) با بذر تیمار نشده (5/10 روز بر بذر) وجود داشت. به این ترتیب پیش تیمار بذر با نانوکود پتاسیم مولفه‌های جوانه‌زنی بذر کینوا و رشد اولیه گیاهچه آن را بهبود بخشید.
IN Order to investigate the effect of water stress and application potassium nanofertilizer on mother plant on germination components of quinoa seed (Chenopodium quinoa Willd), an experiment with two water stress factors at four levels (distilled water (control), -0.3, -0.6. And -0.9 MPa) using polyethylene glycol and two types of seeds obtained from field experiments (pre-treated) in a completely randomized design with four replications in a petri dish. For this purpose, seed samples were collected from two field experimental treatments (1- received nanopotassium fertilizer for field seeds and 2- field seeds without receiving nano-potassium fertilizer). The results showed that with increasing stress intensity, the germination percentage was significantly reduced and from 91.0% in the control treatment to 77.1% in severe stress conditions. With increasing stress intensity, the germination value was significantly reduced and from 1184 in the control treatment to 784 under severe stress. The longitudinal index of seedling vigor increased from 1411 in the control treatment to 1032 in severe stress conditions. Longitudinal index of seedling vigor in seeds treated with (1204) was significantly superior to untreated seeds with (1175). There was a significant difference between the average daily germination of treated seeds (11.6 days per seed) and untreated seeds (10.5 days per seed). Thus, application of potassium nanofertilizer on mother plant improved the germination components of quinoa seeds and their initial seedling growth.
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