نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانش آموخته بیوتکنولوژی کشاورزی، دانشگاه آزاد اسلامی واحد آستارا، آستارا، ایران

2 استادیار، گروه زراعت و اصلاح نباتات، دانشگاه آزاد اسلامی واحد آستارا، آستارا، ایران

3 استادیار، بخش تحقیقات زراعی و باغی، مرکز تحقیقات کشاورزی و منابع طبیعی استان اردبیل (مغان)، سازمان تحقیقات، آموزش و ترویج کشاورزی،

چکیده

این پژوهش به‌منظور بررسی تأثیر کود وکوزیم حاوی جلبک دریایی بر بذور حقیقی هیبرید سیب‌زمینی حاصل از تلاقی دو رقم ساوالان و ساتینا، در شرایط نرمال و تنش کم‌آبی و درون‌شامه‌ای در آزمایشگاه شرکت فناوری زرع گستر آرتا در طی سال‌ 1396 انجام شد. آزمایش به‌صورت فاکتوریل در قالب طرح کاملاً تصادفی با سه تکرار اجرا شد. فاکتور اول شامل سه سطح پلی‌اتیلن‌گلیکول 6000 (صفر، 3- و 6- بار) به‌منظور اعمال تنش کم‌آبی و فاکتور دوم سه سطح وکوزیم (صفر، 30 و 60 میلی‌لیتر در لیتر)، بود. اثر تنش کم‌آبی بر روی تمامی صفات و اثر وکوزیم به‌غیراز درصد جوانه‌زنی بذور بر سایر صفات موردبررسی معنی‌دار بود. اثر متقابل تنش کم‌آبی× وکوزیم ازنظر همه صفات به‌غیراز طول ساقه معنی‌دار بود. طول ساقه براثر افزایش شدت تنش کم‌آبی کاهش یافت و بیشترین صدمه در تنش شدید ملاحظه گردید. بیشترین طول ساقه (67/4 سانتی‌متر)‌در سطح 30 میلی‌لیتر در لیتر کود وکوزیم مشاهده شد. تنش کم‌آبی باعث کاهش مقادیر همه صفات شد. بر اساس نتایج در شرایط تنش شدید اعمال 60 میلی‌لیتر در لیتر وکوزیم می‌تواند باعث بهبود درصد جوانه‌زنی، طول ریشه و ساقه شد ولی تأثیر معنی‌داری بر وزن و تعداد ریز غده نداشت. علاوه بر این در شرایط بدون تنش 60 میلی‌لیتر در لیتر وکوزیم می‌تواند باعث بهبود اکثر صفات شود.

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