تأثیر بنزیل‌آدنین و نیترات پتاسیم بر برخی صفات مورفوفیزیولوژیکی گل نرگس (Narcissus tazetta L.)

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی سابق کارشناسی ارشد، دانشکدۀ کشاورزی، دانشگاه زنجان

2 استادیار، دانشکدۀ کشاورزی، دانشگاه زنجان

3 دانشیار، دانشگاه کشاورزی و منابع طبیعی رامین خوزستان

چکیده

تنظیم‌کننده‌های رشد مختلفی برای بهبود کیفیت گل‌بریده در گیاهان پیازی استفاده می‌شوند ولی تأثیر آن‌ها به ژنوتیپ و شرایط رشد گیاه مانند وضعیت تغذیۀ گیاه نیز بستگی دارد. این آزمایش به‌منظور بررسی برهمکنش بنزیل‌آدنین با غلظت‌های (0، 100، 200  و 500 میلی‌گرم در لیتر) به دو روش (خیساندن سوخ‌ها به مدت 24 ساعت پیش از کشت، محلول‌پاشی در مراحل اولیۀ ظهور گل‌آذین) و نیترات پتاسیم با مقادیر (0، 1، 2، 4 گرم در کیلوگرم خاک به­صورت تغذیۀ خاکی) نیز در دو مرحلۀ (سه برگی و در مرحلۀ متورم شدن گل‌آذین در میان ‌برگ‌ها) بر قطر گلچه و ساقۀ گل، ارتفاع ساقۀ گل‌دهنده، شمار گل در سوخ، وزن تر و خشک گل، عمر گلجایی گل‌بریده و کربوهیدرات‌های محلول و پروتئین برگ نرگس در کشت گلدانی در شرایط مزرعه­ای انجام شد. نتایج نشان داد همۀ صفات موردبررسی پس از کاربرد تیمارهای بنزیل‌آدنین تغییرهای معنی‌داری داشتند که نشان می‌دهد، نرگس نسبت به سایتوکینین حساسیت مثبت دارد. از نظر آماری تیمار نیترات پتاسیم اثر معنی‌داری بر شمار گل در سوخ، وزن تر و خشک گل، عمر گلجایی گل‌بریده نداشت. اما برهمکنش تأثیر بنزیل‌آدنین و نیترات پتاسیم در غلظت‌های بالا موجب افزایش معنی‌دار در قطر گلچه و ساقه، وزن تر و خشک گل، عمر گلجایی گل‌بریده و میزان کربوهیدرات‌های محلول و پروتئین برگ شد. تغییر در ویژگی‌‎های ریخت‌شناسی و بیوشیمیایی در نتیجه کاربرد بنزیل‌آدنین و نیترات پتاسیم، کیفیت گل‌بریدة نرگس را به‌طور مثبتی تغییر داد.

کلیدواژه‌ها


عنوان مقاله [English]

Effects of benzyl adenine and potassium nitrate on some morpho-physiological traits of Narcissus (Narcissus tazetta L.)

نویسندگان [English]

  • Seyedeh Raziyeh Mousavi Matin 1
  • Seyyed Najmmaddin Mortazavi 2
  • Mokhtar Heidari 3
1 Former M. Sc. Student, Faculty of Agriculture, University of Zanjan, Iran
2 Assistant Professor, Faculty of Agriculture, University of Zanjan, Iran
3 Associate Professor, Ramin Agriculture and Natural Resources University, Khuzestan, Iran
چکیده [English]

Several plant growth regulators are used to improve the quality of cut flower in bulb plants, but their effectiveness depends on genotype and plant growth conditions such as nutrition status. A pot experiment was conducted under farm condition to study Benzyl Adenine (BA) and potassium nitrate interaction on floret diameter, stem diameter, flower height, flower number per bulb, fresh and dry weight of flower, cut flower vase life and soluble carbohydrates and proteins in leaves of Narcissus. Different levels of BA (0, 100, 200 and 500 mgl-1) were applied by two approaches of soaking bulbs for 24 hours before planting and spraying at early stages of inflorescence emerge. Potassium nitrate levels of (0, 1, 2 and 4 gKg-1 soil) were applied in two stages of trifoliate and swelling of the inflorescence among leaves as soil application. The results showed that all evaluated traits affected significantly by Benzyl Adenine treatments, which indicated Narcissus plants were positive sensitive to cytokinines. There were no statistically-significant difference between control plants and those undergoing potassium nitrate treatments in terms of flower number per bulb, fresh and dry weight of flower and cut flower vase life. Interaction of Benzyl Adenine and potassium nitrate at high levels caused significant increase in floret diameter, stem diameter, fresh and dry weight of flower, cut flower vase life, soluble carbohydrates and proteins. Results showed that the alteration in morphological and biochemical characters because of Benzyl Adenine and nitrogen positively affected cut flower quality of Narcissus.

کلیدواژه‌ها [English]

  • cut flower
  • flowering quality
  • growth regulater
  • nitrogen
  • ornamental plant
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