نوع مقاله : مقاله پژوهشی
نویسندگان
1 دکتری زراعت (فیزیولوژی گیاهان زراعی)، دانشکده کشاورزی دانشگاه لرستان
2 دانشیار گروه زراعت و اصلاح نباتات دانشکده کشاورزی دانشگاه لرستان
چکیده
به منظور بررسی اثر محلول پاشی آهن، روی و منگنز بر صفات فیزیولوژیک، زراعی و پروتئین گندم تحت تنش گرمای انتهای فصل، آزمایشی به صورت کرت های خرد شده با چهار تکرار در شهرستان رامهرمز اجرا گردید. فاکتورهای آزمایشی شامل تاریخ کاشت در دو سطح مناسب (15 آبان) و تأخیری (30 آذر) به عنوان عامل اصلی و محلول پاشی عناصر غذایی کم مصرف در شش سطح عدم محلول پاشی (شاهد)، محلول پاشی با آب، آهن، روی، منگنز و آهن + روی + منگنز به عنوان عامل فرعی بودند. نتایج نشان داد، تأخیر در کاشت به دلیل تنش گرمای انتهایی بجز محتوای پرولین برگ و پروتئین دانه، صفات شاخص کلروفیل برگ، شاخص پایداری غشای سلول، عملکرد دانه، عملکرد بیولوژیک و شاخص برداشت را به طور معنی داری کاهش داد. با این وجود، محلول پاشی آهن، روی و منگنز توانست صفات اندازه گیری شده در تاریخ کاشت مناسب و تأخیری را به طور معنی داری افزایش دهد. در این میان، کاربرد محلول پاشی روی بیشترین اثر را در کاهش آسیب ناشی از تنش گرمای انتهایی بر صفات مورد اندازه گیری نشان داد. به طور کلی، کاشت در تاریخ 15 آبان و استفاده از عناصر غذایی کم مصرف به ویژه روی به صورت محلول پاشی میتواند اثرات زیانبار ناشی از تنش گرمای انتهایی را کاهش و موجب بهبود صفات فیزیولوژیک، زراعی و محتوای پروتئین دانه گندم نان در منطقه شود.
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