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ارزیابی عملکرد و اجزای عملکرد گندم در پاسخ به کاهش کود نیتروژن و بذر مصرفی تحت شرایط کشاورزی پایدار | ||
تحقیقات غلات | ||
مقاله 8، دوره 6، شماره 1، خرداد 1395، صفحه 89-103 اصل مقاله (249.8 K) | ||
نوع مقاله: مقاله پژوهشی | ||
نویسندگان | ||
داود امیدی نسب* 1؛ محمد حسین قرینه2؛ عبدالمهدی بخشنده3؛ مهران شرفی زاده4؛ علیرضا شافعی نیا2 | ||
1دانش آموخته کارشناسی ارشد، دانشگاه کشاورزی و منابع طبیعی رامین، اهواز، ایران | ||
2دانشیار، دانشگاه کشاورزی و منابع طبیعی رامین، اهواز، ایران | ||
3استاد، دانشگاه کشاورزی و منابع طبیعی رامین، اهواز، ایران | ||
4کارشناس ارشد، واحد کنترل و گواهی بذر استان خوزستان، اهواز، ایران | ||
چکیده | ||
به منظور ارزیابی عملکرد و اجزای عملکرد دانه گندم در پاسخ به کاهش کود نیتروژن و بذر مصرفی در شرایط کشاورزی پایدار، آزمایشی به صورت کرتهای خرد شده- فاکتوریل در قالب طرح پایه بلوکهای کامل تصادفی با چهار تکرار در مرکز تحقیقات کشاورزی دزفول در سال زراعی 91-1390 اجرا شد. دو رقم گندم (چمران و بهرنگ) در کرتهای اصلی و پنج سطح تراکم بذر (شامل 50، 100، 150، 200 و 250 کیلوگرم در هکتار) به همراه شش سطح کود نیتروژن از منبع اوره (شامل صفر، 50، 100، 150، 200 و 250 کیلوگرم در هکتار) به صورت فاکتوریل در کرتهای فرعی قرار گرفتند. نتایج تجزیه واریانس دادهها نشان داد که اثر رقم، کود نیتروژن و بذر مصرفی بر عملکرد و اجزای عملکرد دانه در سطح احتمال یک درصد معنیدار بود. رقم چمران با میانگین عملکرد دانه 70/4130 کیلوگرم در هکتار برتری معنیداری نسبت به رقم بهرنگ داشت. مصرف بذر بیش از 100 کیلوگرم در هکتار، عملکرد دانه را کاهش داد و بیشترین عملکرد دانه با میانگین 4975 کیلوگرم در هکتار در تراکم بذر 100 کیلوگرم در هکتار به دست آمد. در مقابل، افزایش مصرف کود نیتروژن تا سطح 150 کیلوگرم در هکتار، عملکرد دانه را به طور معنیداری افزایش داد و پس از آن تغییر معنیداری مشاهده نشد. | ||
کلیدواژهها | ||
تراکم بذر؛ شاخص سطح برگ؛ صفات مرفولوژیک | ||
مراجع | ||
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