اثر ميزان و زمان مصرف نيتروژن بر عملكرد گندم دوروم
الموضوعات :
محمد سعدي
1
(دانش آموخته کارشناسی ارشد زراعت واحد خوي ، دانشگاه آزاد اسلامی خوی - ايران)
علی نصرالله زاده اصل
2
(گروه کشاورزی-دانشکده کشاورزی-دانشگاه ازاد اسلامی خوی)
الکلمات المفتاحية: شاخص برداشت, عملكرد, گندم دوروم, نيتروژن ,
ملخص المقالة :
به منظور بررسي اثر مقدار و زمان مصرف كود اوره بر عملكرد و اجزاي عملكرد گندم دوروم رقم آريا، آزمايشی در سال زراعي 91-1390 در دو كيلومتري شهرستان چايپاره به صورت فاكتوريل بر پايه بلوك هاي كامل تصادفي در سه تكرار اجرا شد. مقدار كود اوره به عنوان عامل اوّل در سه سطح (188، 250، 313 كيلوگرم در هكتار) و زمان مصرف كود به عنوان عامل دوم در 4 سطح b1( مرحله کاشت + مرحله ساقه روي + مرحله گلدهي) ، b2 ( مرحله کاشت + مرحله ساقه روي + مرحله گلدهي) ، b3 ( مرحله کاشت + مرحله پنجه زني + مرحله ساقه روي + مرحله گلدهی) ، b4 ( مرحله کاشت + مرحله پنجه زني + مرحله ساقه روي) در نظر گرفته شدند. نتايج نشان داد كه اثر مقدار كود بر ارتفاع بوته، تعداد سنبله در متر مربع، تعداد دانه در سنبله، وزن هزار دانه، طول سنبله، تعداد سنبلچه در سنبله، عملكرد دانه و شاخص برداشت معني دار بود. بيشترين عملكرد دانه به ميزان 26/710 گرم در متر مربع با مصرف 313 كيلوگرم اوره در هكتار بدست آمد. اثر زمان مصرف كود اوره نيز بر تمام صفات به جزء وزن هزار دانه معني دار بود. بيشترين عملكرد دانه به ميزان 88/693 گرم در متر مربع با تقسيط نيتروژن در چهار مرحله رشدی ( مرحله کاشت + مرحله پنجه زني + مرحله ساقه روي + مرحله گلدهی) مشاهده شد.
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