مطالعه اثر تیمارهای اسید آبسیزیک و اسید جاسمونیک بر صفات مورفو فیزیولوژیک ارقام گلرنگ تحت تیمارهای کم آبیاری
الموضوعات :
1 - گروه کشاورزی ، دانشگاه پیام نور، تهران ، ایران
الکلمات المفتاحية: درصد روغن, دوام سطح برگ, سرعت رشد محصول, شاخص سطح برگ, عملکرد روغن,
ملخص المقالة :
به منظور بررسی تیمارهای کم آبیاری و محلول پاشی با اسيد جاسمونیک و اسید آبسیزیک بر برخی صفات مورفوفیزیولوژیک رقم گلرنگ آزمایشی به صورت اسپلیت پلات فاکتوریل در قالب طرح پایه بلوکهای کاملا تصادفی با سه تکرار در مزرعه تحقیقاتی دانشکده کشاورزی دانشگاه شاهرود طی دو سال 1401-1400انجام شد. در این آزمایش سه سطح آبیاری (۱۰۰، ۷۰ و ۵۰ درصد نیاز آبیاری گلرنگ) به عنوان فاکتور اصلی و سه رقم گلرنگ (گلدشت، فرامان و سینا) و محلول پاشی با سه سطح شامل (غلظت صفر، محلول پاشی با اسید جاسمونیک با غلظت 5/0 میلی مولار و محلول پاشی با اسید آبسیزیک با غلظت ۲۰ میلی مولار) به عنوان فاکتور فرعی انتخاب شدند. نتایج نشان داد که بیشترین محتوای نسبی آب برگ، کلروفیل، شاخص سطح برگ، عملکرد دانه، درصد روغن و عملکرد روغن مربوط به رقم سینا و تیمار آبیاری ۱۰۰ درصد نیاز آبیاری گلرنگ و کمترین میزان این صفات مربوط به رقم گلدشت و تیمار آبیاری ۵۰ درصد نیاز آبی گلرنگ بود. برهمکنش رقم × محلول پاشی و تنش كم آبیاری در محلول پاشی تنها بر عملکرد روغن و کلروفیل a معنی دار شد. محلول پاشی با اسيد جاسمونیک و اسید آبسیزیک نیز موجب افزایش کلیه صفات در مقایسه با تیمار بدون محلول پاشی شد. نتایج نشان داد که تفاوت‌های موجود در بین رقم‌ها و همچنین تأثیر این محلول پاشی‌ها جهت افزایش میزان صفات مورد بررسي مي تواند در انتخاب رقم و ترکیبات مناسب جهت کاهش اثرات نامطلوب تنش بی به منظور دستیابی به افزایش تولید از آنها استفاده کرد.
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