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اثر سولفات روی بر رشد و عملکرد گندم در شرایط کمبود روی خاک و تنش خشکی | ||
تحقیقات غلات | ||
مقاله 2، دوره 6، شماره 2، شهریور 1395، صفحه 145-158 اصل مقاله (407.18 K) | ||
نوع مقاله: مقاله پژوهشی | ||
نویسندگان | ||
امین عباسی* ؛ فریبرز شکاری | ||
استادیار، گروه زراعت و اصلاح نباتات، دانشکده کشاورزی دانشگاه مراغه، مراغه، ایران | ||
چکیده | ||
تنش خشکی یکی از عوامل اصلی کاهش رشد و عملکرد گندم است که موجب کاهش جذب عناصر ریزمغذی بهویژه عنصر روی از خاک میشود. به منظور بررسی روشهای مختلف مصرف روی در گندم رقم هما تحت شرایط تنش خشکی، پژوهشی به صورت کرتهای خرد شده در قالب طرح بلوکهای کامل تصادفی با سه تکرار در دانشکده کشاورزی دانشگاه مراغه در سال 1392 انجام شد. دو فاکتور شامل تنش خشکی (آبیاری کامل، تنش در مرحله ظهور برگ پرچم و تنش در مرحله ظهور نخستین ریشکها) بهعنوان فاکتور اصلی و روشهای زیفزونی عنصر روی) بذرخشک، پیشتیمار، کاربرد خاکی و افشانه کردن) بهعنوان فاکتور فرعی در نظر گرفته شدند. نتایج به دست آمده نشان داد که تنش خشکی بر ماده خشک کل، شاخص برداشت، عملکرد، وزن سنبله، طول سنبله، ارتفاع گیاه، وزن پدانکل، طول پدانکل، دمای کانوپی، پرولین، کلروفیل و میزان روی دانه در سطح احتمال یک درصد معنیدار بود. مصرف عنصر روی تحت تنش خشکی نیز در صفات ماده خشک کل، شاخص برداشت، عملکرد، وزن سنبله ، طول سربند، دمای کانوپی، کلروفیل و میزان روی در سطح احتمال یک درصد معنیدار شد. با مصرف خاکی عنصر روی تحت تنش مرحله ظهور برگ پرچم، ماده خشک کل با افزایشی 22 درصدی به مقدار 3/4733 کیلوگرم در هکتار، میزان عملکرد با افزایشی 11 درصدی به مقدار 1732 کیلوگرم در هکتار و میزان روی دانه با افزایشی 77 درصدی به مقدار 7/27 میلیگرم بر کیلوگرم ارتقا یافت. با توجه به نتایج این پژوهش، برای مزارع دیم کشور مصرف خاکی این عنصر پیشنهاد میشود. | ||
کلیدواژهها | ||
دمای سایهانداز؛ شاخص برداشت؛ شاخص کلروفیل؛ غلظت پرولین؛ غلظت روی دانه | ||
مراجع | ||
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