واکنش گروههای مختلف رسیدگی هیبریدهای ذرت (Zea mays L.) به تاریخ کاشت در منطقه مشهد

نوع مقاله : علمی - پژوهشی

نویسندگان

چکیده

تعداد 20 هیبرید مختلف داخلی و خارجی ذرت (Zea mays L.) از پنج گروه رسیدگی در طی دو سال (1386 و 1387) در منطقه مشهد مورد مطالعه قرار گرفتند. این بررسی بصورت کرت های یکبار خرد شده بر پایه طرح بلوک های کامل تصادفی در سه تکرار به اجرا در آمد که در آن سه تاریخ کاشت (15 اردیبهشت- 30 اردیبهشت و 15 خرداد) در کرت های اصلی و هیبریدها در کرت های فرعی قرار داده شدند. نتایج حاصل نشان داد که کشت هیبریدهای دیررس با ریسک بالائی همراه است. در تاریخ کاشت سوم اکثر هیبریدها بجز هیبریدهای زودرس قادر به طی مراحل رشد و نمو بطور کامل نمی باشند. ارقام زودرس بویژه رقم KSC 260 در تاریخ کاشت دوم و سوم و متوسط- زودرس مثل KSC 400 در تاریخ کاشت اول و دوم می تواند بدون کاهش عملکرد جایگزین هیبرید دیررس KSC 704 گردند. رقم هیبرید KSC 260 در سال 1386 و 1387 در تاریخ کاشت سوم بترتیب با تولید 886/13 و 698/11 تن در هکتار با رطوبت مناسب قابل برداشت بود در حالیکه رقم دیررس رایج KSC 704 در همین شرایط با تولیدی معادل 007/13 و 243/16 تن در هکتار دارای رطوبت دانه حدود دو برابر رقم زودرس بود که از نظر آماری تفاوت معنی داری با عملکرد رقم زودرس نداشت.

کلیدواژه‌ها


عنوان مقاله [English]

Response of maize different maturity hybrids to planting dates in Mashhad region

نویسندگان [English]

  • R. Choukan
  • H. Hassanzadeh Moghaddam
چکیده [English]

Twenty local and foreign maize (Zea mays L.) hybrids in five different maturity groups were evaluated in Mashhad, Iran for two years (2007-2009). Three planting dates (5th May, 20th May and 5th June) and hybrids were arranged in a randomized complete block design as split plot arrangements, with three replications. The planting dates were in main plots and hybrids in subplots. The results indicated that late maturing hybrids will have high risk in region. In 5 June planting, non of hybrids except early maturing group, failed to reach proper maturity. Results revealed that KSC 704 can be replaced by early hybrid, KSC 260 in 20 May and 5 June plantings, as well as medium-early hybrids such as KSC 400 in 5 May and 20 May plantings. Hybrid KSC 260 in 5th June sowing, produced 13.886 and 11.698 t.ha-1 grain with proper harvestable moisture in 2007 and 2008 respectively, while, late hybrid KSC 704 produced 13.007 and 16.243 t.ha-1 grain with very high moisture, without significant grain yield.

کلیدواژه‌ها [English]

  • Earliness
  • grain yield
  • Planting date
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