اثر ماده کندکننده رشد کلرمکوات کلراید و سطوح کود نیتروژن بر برخی صفات فیزیولوژیک، بیوشیمیایی و عملکرد جو رقم ماکویی (Hordeum vulgare L.)

فیزیولوژی محیطی گیاهی

مقاله 6، دوره 13، شماره 49، فروردین 1397، صفحه 69-81   

نوع مقاله: پژوهشی

نویسندگان

احمد افکاری^{* 1}؛ میترا عباسی²

¹گروه فیزیولوژی گیاهی، واحد کلیبر، دانشگاه آزاد اسلامی، کلیبر، ایران.

²گروه زیست شناسی، واحد اردبیل، دانشگاه آزاد اسلامی، اردبیل، ایران.

چکیده

    به‌منظور بررسی اثر غلظت‌های مختلف کلرمکوات کلراید و سطوح محتلف کود نیتروژن بر برخی صفات فیزیولوژیک، بیوشیمیایی و عملکرد جو رقم ماکویی آزمایشی در بهار سال زراعی 1394 به‌صورت فاکتوریل در قالب طرح پایه بلوک‌های کامل تصادفی در 4 تکرار اجرا شد. تیمارهای آزمایش شامل غلظت‌های کلرمکوات کلراید (صفر، 500، 1000 و 1500 میلی‌گرم در هکتار) و نیتروژن در 3 سطح (50 ، 100 و 150 کیلوگرم در هکتار) بود. نتایج تحقیق نشان داد که اثر برهم‌کنش کلرمکوات کلراید و کود نیتروژنه بر میزان کلروفیل، محتوی رطوبت نسبی، عملکرد و درصد پروتئین، فعالیت آنزم‌های سوپراکسید دیسموتاز و کاتالاز در سطح احتمال خطای یک درصد و روی تعداد دانه در هر سنبله، وزن هزار دانه و فعالیت آنزم گلوتاتیون پراکسیداز در سطح احتمال خطای پنج درصد معنی‌داری است. افزایش مصرف میزان کود نیتروژنه سبب کاهش محتوی نسبی آب برگ به دلیل کاهش پتانسیل آب برگ گردید. کلرمکوات کلراید با انتقال مواد فتوسنتزی کافی به دانه‌ها در پر شدن آن‌ها و افزایش وزن دانه‌ها نقش به سزایی دارد. افزایش مصرف میزان غلظت کلرمکوات کلراید و فراهمی نیتروژن موجب کاهش فعالیت آنزیم‌های سوپراکسید دیسموتاز، کاتالاز و گلوتاتیون پراکسیداز شده است. به‌طور کلی، در این پژوهش بیشترین میزان کلروفیل، محتوای رطویت نسبی، اجزای عملکرد، عملکرد و درصد پروتئین از کاربرد تیمار 1500 میلی‌گرم در هکتار کلرمکوات کلراید و 150 کیلوگرم در هکتار نیتروژن به‌دست آمد.

کلیدواژه‌ها

آنزیم‌های آنتی‌اکسیدان؛ سایکوسل؛ پروتئین؛ کلروفیل؛ محتوای نسبی آب

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