نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد، دانشگاه آزاد اسلامی، واحد رشت، گروه زراعت، رشت، ایران

2 استادیار، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان گیلان، رشت، ایران

3 استادیار گروه زراعت و اصلاح نباتات، واحد رشت، دانشگاه آزاد اسلامی، رشت، ایران

چکیده

به­منظور ارزیابی عملکرد دانه و اسیدهای چرب روغن بادام‌زمینی تحت تأثیر کشت مخلوط با ذرت و مقادیر مختلف نیتروژن، آزمایشی به­صورت اسپلیت پلات در قالب طرح پایه بلوک­های کامل تصادفی در 3 تکرار در رشت، در سال زراعی 94-1393 انجام شد. مقادیر مختلف کود نیتروژن شامل صفر، 100، 200 و 300 کیلوگرم در هکتار به­عنوان فاکتور اصلی و کشت خالص ذرت و بادام زمینی و ردیف­های کشت مخلوط ذرت و بادام زمینی با نسبت‌های­ 1:1، 2:1، 1:2 و 2:2 به­عنوان فاکتور فرعی مدنظر قرار گرفتند. بالاترین عملکرد دانه ذرت (10540 کیلوگرم در هکتار) تحت اثر متقابل 200 کیلوگرم نیتروژن و سیستم کشت مخلوط ذرت و بادام­زمینی با نسبت 2:2 به­دست آمد. اثر متقابل 100 کیلوگرم نیتروژن و سیستم کشت مخلوط با نسبت 2:1 بیشترین عملکرد دانه بادام­زمینی (1786 کیلوگرم در هکتار) را نشان داد. با افزایش کاربرد نیتروژن، میزان اسید چرب اولئیک در روغن بادام­زمینی کاهش پیدا کرد، ولی محتوای اسید چرب لینولئیک افزایش یافت. بالاترین درصد اسید چرب اولئیک (31/27 درصد) در سیستم کشت مخلوط ذرت و بادام­زمینی با نسبت 2:1 مشاهده گردید. به­طورکلی، کاربرد 100 کیلوگرم نیتروژن در هکتار و سیستم کشت مخلوط ذرت و بادام­زمینی با نسبت 2:1 می­تواند برای بهبود نسبت برابری زمین و افزایش عملکرد و کیفیت روغن بادام‌زمینی در شرایط اقلیمی منطقه قابل توصیه باشد.

کلیدواژه‌ها

عنوان مقاله [English]

Evaluation of grain yied, land equivalent ratio and fatty acids combination of peanut oil in intercopping with corn as affected by different levels of nitrogen

نویسندگان [English]

  • Omid Seyed noori 1
  • MArefat Mostafavi Rad 2
  • Mohammad Hossein Ansari 3

1 M.Sc. Student, Department of Agronomy, Rasht Branch, Islamic Azad University, Rasht - Iran

2 Professor Assistant, Agricultural and Natural Resources Research and Education Center of Guilan Province, Rasht – Iran

3 Professor Assistant, Department of Agronomy, Rasht Branch, Islamic Azad University, Rasht - Iran

چکیده [English]

In order to evaluate grain yield and fatty acids in peanut (Arachis hypogaea L.) oil as affected by intercropping with corn (Zea mays L.) and different nitrogen rates, an experiment was carried out during 2014-15 cropping season as split plot based on randomized complete block design with three replications in Rasht, Iran. Different rates of nitrogen fertilizer including 0, 100, 200 and 300 kg/ha as main plots and sole cropping of corn and peanut, rows of corn and peanut intercropping at ratio of 1:1, 2:1, 1:2 and 2:2 as sub plots, comprised the experimental factors. The highest corn grain yield (10540 kg/ha) was obtained under the interaction effect between 200 kg N/ha and C6 intercropping system by the ratio of 2:2. The interaction effect between 100 kg N/ha and C5 intercropping system by the ratio of 1:2 showed the greatest peanut grain yield (1786 kg/ha). By increment of nitrogen application, the rate of oleic acid decreased in peanut oil, but the content of linoleic acid enhanced. The highest ratio of oleic acid (27.31%) was observed under corn and peanut intercropping systems at the ratio of 2:1. In general, nitrogen application up to 100 kg/ha and intercropping systems between corn and peanut at the ratio of 2:1 could be recomendable to improve land equivalent ratio and enhancement of grain yield and peanut oil quality under the climatic condition of region.

کلیدواژه‌ها [English]

  • Intercropping patterns
  • Land equivalent ratio
  • nitrogen
  • Oil quality
  • Peanut
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