تاثیر تنش خشکی و محلول پاشی اسید جیبرلیک و اسید سالیسیلیک بر عملکرد کمی و کیفی کلزا (Brassica napus L.)

نوع مقاله: پژوهشی

نویسندگان

1 گروه زراعت و اصلاح نباتات، واحد ایلام، دانشگاه آزاد اسلامی، ایلام، ایران

2 باشگاه پژوهشگران جوان و نخبگان، واحد آیت‌الله آملی، دانشگاه آزاد اسلامی، آمل، ایران

چکیده

آزمایشی طی یک سال زراعی به صورت طرح کرت های دوبار خرد شده در قالب طرح بلوک­های کامل تصادفی با سه تکرار در سال 1396 در شهرستان دره شهر از توابع استان ایلام انجام شد. فاکتور‌های آزمایشی عبارتنداز آبیاری در چهار سطح شامل: آبیاری عادی یا شاهد، قطع آبیاری در مرحله ساقه رفتن، قطع آبیاری در آغاز گلدهی، قطع آبیاری در آغاز غلاف دهی به عنوان بلوک­های اصلی و فاکتور فرعی شامل عدم مصرف و مصرف100 پی‌پی‌ام جیبرلیک اسید و فاکتور فرعی فرعی شامل عدم مصرف و مصرف 150 پی پی ام اسید سالیسیلیک بود. نتایج مقایسه میانگین اثر هورمون جیبرلیک اسید نشان داد در تیمار مصرف هورمون بیشترین اسید چرب اشباع و در تیمار عدم مصرف هورمون جیبرلیک اسید کمترین اسید چرب اشباع بدست آمد. همچنین با به تاخیر افتادن اعمال تنش خشکی درصد روغن نیز به طور معنی داری کاهش یافت. تاثیر تنش خشکی بر اسید چرب اشباع معنی دار بود ولی اسید چرب غیراشباع تحت تاثیر تنش خشکی قرار نگرفت. مصرف اسیدهای جیبرلیک و سالیسلیک موجب افزایش معنی دار درصد روعن و اسیدهای چرب اشباع گردید. مقایسه میانگین تیمار قطع آبیاری نشان داد بیشترین تاثیر بر عملکرد بیولوژیک در شاهد و مصرف هورمون جیبرلیک اسید و اسید سالیسیلیک بود، اما کمترین در تیمار قطع آبیاری در مرحله آغاز غلاف دهی و عدم محلول پاشی هردو(جیبرلیک اسید و اسید سالیسیلیک) مشاهده شد. همچنین کابرد توام هر دو هورمون درصد روغن را بصورت معنی داری افزایش داد. بر اساس نتایج این پژوهش می‌توان نتیجه گرفت، که اعمال محلول پاشی هورمون­های جیبرلیک اسید و اسید سالیسیلیک در کشت کلزا تحت تاثیر تنش آبی، تاثیر معنی داری بر عملکرد کلزا داشته و در صورت مصرف هورمون­های مذکور در زمان صحیح اثر سوء تنش کاهش یافته و عملکرد روغن کلزا افزایش می یابد.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of drought stress and spraying of gibberellic acid and salicylic acid on the quantitative and qualitative yield of canola (Brassica napus)

نویسندگان [English]

  • naser ezati 1
  • Abbas Maleki 1
  • Amin Fathi 2
1 Department of Agronomy and Plant Breeding, Ilam Branch, Islamic Azad University, Ilam, Iran
2 Young Researchers and Elite Club, Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran
چکیده [English]

An experiment was conducted as split-split plot based on randomized complete block design (RCBD) with three replications during cultivation season 2017-2018 in Darreh-Shahr, Ilam Province. The experimental factors were four levels of irrigation as main plots including normal irrigation, cut of irrigation at stem elongation stage, cut of irrigation at the beginning stage of flowering, and cut of Irrigation at the beginning of the pod. Sub-factors included two levels of spraying and non-spraying of gibberellin hormone (100ppm) and salicylic acid (150 ppm), respectively. The comparison of mean effects of gibberellin showed that application of gibberellin resulted in highest saturated fatty acid while the plants receiving no gibberellin contained the lowest saturated fatty acid. The later drought stress occurred, the more significant was reduction in the oil percentage. The effect of drought stress on saturated fatty acid was significant but it had no significant impact on the unsaturated fatty acid. Both applications of gibberellin and salicylic acid increased the oil percentage and saturated fatty acid content. Results showed that normal irrigation with both uses of gibberellin hormone and salicylic acid produced the highest biological yield and the lowest dry matter was obtained in irrigation cutting at the beginning of podding stage without any spraying . The combined application of these two hormones increased seed oil content significantly. Finally, the findings indicated that the spraying of gibberellin and salicylic acid under drought stress significantly affected the yield in canola and when these hormones are applied at a suitable time they decrease the adverse effects of drought stress and increases oil yield.
 

کلیدواژه‌ها [English]

  • Saturated fatty acid
  • Drought stress
  • Grain yield
  • Canola
  • Gibberellin spraying
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