بررسی عملکرد و کارآیی نیتروژن و فسفر در کشت مخلوط ردیفی گندم و کلزای پاییزه

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشگاه فردوسی مشهد

چکیده

به‌منظور بررسی عملکرد و کارآیی نیتروژن و فسفر در کشت مخلوط گندم- کلزا، آزمایشی در سال زراعی 93-1392 در مزرعه تحقیقاتی دانشگاه فردوسی به‌صورت فاکتوریل در قالب طرح بلوک‌های کامل تصادفی با سه تکرار انجام شد. تیمارهای آزمایش شامل: کشت خالص گندم (ارقام الوند و فلات)، کشت خالص کلزا (ارقام اکاپی و زرفام) و کشت مخلوط کلزا و گندم به‌صورت ردیفی با نسبت‌های 1:1، 2:2 و 3:3 بودند. نتایج به‌دست آمده از این آزمایش نشان داد که بیشترین عملکرد اقتصادی و بیولوژیک گندم و کلزا پس از کشت خالص، در تیمار کشت سه ردیفی مشاهده شد. همچنین بالاترین نسبت برابری زمین از تیمار الوند- اکاپی (3:3) به‌دست آمد. بالاترین کارایی فیزیولوژیک نیتروژن و فسفر گندم مربوط به کشت خالص رقم فلات بود و در مورد کلزا در تیمار فلات- زرفام 2:2 مشاهده شد. بیشترین کارایی مصرف نیتروژن و فسفر گندم بعد از کشت خالص الوند، در تیمار الوند- اکاپی 3:3 مشاهده شد. تیمارهای الوند- اکاپی 3:3 برای گندم و کشت خالص رقم اکاپی برای کلزا بیشترین کارایی جذب نیتروژن و فسفر را داشت. در مجموع با توجه به مشاهدات این آزمایش و از آن‌جایی‌که بیشترین میزان کارایی جذب و مصرف عناصر در تیمارهای کشت سه ردیفی مشاهده شد، به‌نظر می‌رسد الگوی کشت مخلوط سه ردیفی گندم و کلزا شرایط مناسب‌تری برای استفاده بهتر از عناصری همچون نیتروژن و فسفر دارا می‌باشد.

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