تاثیر یونیکونازول و کودهای زیستی بر طول دوره پر شدن دانه و سهم فرایند انتقال مجدد در عملکرد دانه گندم در رژیم های متفاوت رطوبتی در شرایط گلخانه

نوع مقاله: مقاله پژوهشی

نویسنده

استاد دانشکده کشاورزی و منابع طبیعی دانشگاه محقق اردبیلی

چکیده

کاربرد کودهای زیستی و یونیکونازولروشیمناسببرایافزایش عملکرد گندم تحت شرایط محدودیت آبیاست. به­ منظور بررسی تأثیر یونیکونازول و کودهای زیستی بر طول دوره پر شدن دانه و سهم فرایند انتقال مجدد در عملکرد دانه­ گندم دررژیم‌های متفاوت رطوبتی، آزمایشی به­ صورت فاکتوریل در قالب طرح پایه بلوک­های کامل تصادفی با سه تکرار در سال 1394 در گلخانه تحقیقاتی دانشکده کشاورزی و منابع طبیعی دانشگاه محقق اردبیلی اجرا شد. تیمارهای آزمایش شامل محلول‌پاشی با یونیکونازول در دو سطح )عدم محلول­ پاشی و محلول­ پاشی 0.1 گرم در لیتر(، کودهای زیستی در چهار سطح )کاربرد میکوریزا، ازتوباکتر و سودوموناس، کاربرد توأم میکوریزا با باکتری­ها، عدم کاربرد کودهای زیستی به‌عنوان شاهد( و آبیاری در سه سطح )آبیاری کامل، آبیاری تا 50 درصد مراحل خوشه‌دهی و چکمه­ ای شدن به ترتیب به‌عنوان محدودیت ملایم و شدید آبی( بودند. نتایج نشان داد بیش­ترین سهم انتقال مجدد ماده خشک از کل اندام هوایی (57.6 درصد) و مشارکت ذخایر ساقه در عملکرد دانه (53.4 درصد) و کمترین طول دوره پر شدن دانه (26.6روز) در آبیاری تا 50 درصد چکمه­ ای شدن، عدم کاربرد کودهای زیستی و عدم محلول‌پاشی با یونیکونازول به دست آمد. حداکثر وزن تک بذر و طول دوره پر شدن دانه (به ترتیب با 0.052 گرم و 34.5روز) به کاربرد توأم کودهای زیستی و یونیکونازول و در آبیاری کامل و کمترین آن‌ها (0.030 گرم، 626.6 روز) در عدم مصرف کودهای زیستی و یونیکونازول و در آبیاری تا 50 درصد چکمه ­ای شدن به دست آمد. حداکثر سرعت پر شدن دانه (0.00248 گرم در روز) در کاربرد کودهای زیستی و یونیکونازول و در آبیاری تا 50 درصد چکمه ­ای شدن و کمترین میزان آن (0.0016 گرم در روز) در عدم مصرف کودهای زیستی و یونیکونازول و در آبیاری کامل به دست آمد. به‌طورکلی کاربرد کودهای زیستی و یونیکونازول می­تواند به­عنوان یک فاکتور مدیریتی مناسب برای افزایش عملکرد دانه و طول دوره­ پر شدن دانه در شرایط محدودیت آبی باشد.

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