اثر پیش تیمار بذر با عناصر کم مصرف بر سرعت جوانه زنی، ویگور گیاهچه و عملکرد گل همیشه بهار
الموضوعات : بوم شناسی گیاهان زراعی
بهرام میرشکاری
1
(دانشیار گروه زراعت و اصلاح نباتات دانشگاه آزاد اسلامی واحد تبریز، تبریز، ایران)
الکلمات المفتاحية: پرایمینگ بذر, بهبود تغذیه, درصد جوانه زنی نهایی, محلول های غذایی,
ملخص المقالة :
یکی از این روش های ساده و کم هزینه برای بهبود تغذیه و جوانه زنی و رشد اولیه گیاهان، پرایمینگ غذایی بذر است. به منظور ارزیابی تاثیر تیمار بذر با روی و منگنز بر جوانه زنی و عملکرد گل همیشه بهار آزمایشی اجرا شد. تیمارهای مورد مطالعه شامل پرایمینگ بذر با غلظت های 5/0%، 1%، 5/1% و 2% ZnSO4, H2O (Zn 35%, S 12%) و MnSO4, 3H2O (Mn 26%, S 15%) همراه با Zn1%+Mn1%، Zn1.5%+Mn1% و شاهد بود. متوسط درصد جوانه زنی نهایی بذرهای تیمار شده با روی و منگنز به تنهایی به ترتیب حدود 79% و 5/79% بودند. 71% درصد بذور شاهد نیز مرحله جوانه زنی را تکمیل کردند. افزایش در غلظت Zn وMn در محلول موجب محدود شدن شاخص قدرت گیاهچه شد. بیشترین عملکرد گل از تیمارهای حاوی 1% سولفات روی + 1% سولفات منگنز، 5/1% سولفات منگنز، 5/1% سولفات روی + 1% سولفات منگنز و 5/1% و 2% سولفات روی حاصل شد. بین دو تیمار ترکیبی از نظر عملکرد اسانس روغنی اختلاف معنی دار به وجود آمد و تیمار 5/1% سولفات روی + 1% سولفات منگنز با کاهشی حدود 03/0 میلی لیتر در متر مربع در مقدار اسانس در کلاس آماری پایین تری نسبت به دیگر تیمار ترکیبی قرار گرفت. عکس العمل عملکرد اسانس روغنی به تیمار بذر با Zn و Mn مثبت و معنی دار بود و تمام تیمارهای مورد مطالعه به جز غلظت های 5/0% از هر کدام از عناصر کم مصرف عملکرد اسانس بالاتری نسبت به شاهد داشتند. تیمار بذر در شرایط مزرعه با محلول های غذاییZn و Mn می تواند به عنوان روشی برای بهبود عملکرد اسانس همیشه بهار توصیه شود.
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