Different Concentrations of Nitrogen and Potting Media Composition Effects on the Growth and Quality of Poinsettia (Euphorbia pulcherrima) cv. Noel Red

محورهای موضوعی : مجله گیاهان زینتی

Somaye Katebi ¹ , Parviz Noruzi ² , Javad Rezapour ³

1 - Msc. Graduated Student of Horticultural Science, Faculty of Agriculture, Urmia University, Urmia, Iran
2 - Assistant Professor of Horticultural Science, Faculty of Agriculture, Urmia University, Urmia, Iran
3 - Assistant Professor of Horticultural Science, Faculty of Agriculture, Urmia University, Urmia, Iran

تاریخ دریافت : 1399/02/21 تاریخ پذیرش : 1399/09/25 تاریخ انتشار : 1399/12/11

کلید واژه: Peat moss, Quality, Nitrate, Anthocyanin, Poinsettia,

چکیده مقاله :

Poinsettia (Euphorbia pulcherrima) is one of the most important ornamental pot plants that form colored bracts in short days. The present research carried out to evaluate the effect of different concentrations of nitrogen in nutrient solution (180, 230, 280 and 330 mg L-1) and culture media composition (peat moss and perlite (2:1 v/v ratio) and cocopeat and perlite (2:1 v/v ratio) on some morphological and physiological indices of poinsettia. The experimental was factorial based on a completely randomized design with eight treatments and three replications. Results showed that the nitrogen concentration of 230 mg L-1 with cocopeat and perlite media increased plant height, canopy diameter and nitrogen content of leaf tissue. The concentration of 230 mg L-1 nitrogen also increased fresh weight of stem and root more than other treatments whereas highest stem dry weight resulted with the concentration of 280 mg L-1 nitrogen and cocopeat and perlite media. Using peat moss and perlite mixture with 330 mg L-1 of nitrogen increased chlorophyll a and bract anthocyanin content. Generally, results showed that the application of 230 and 280 mg L-1 nitrogen and cocopeat and perlite (2:1 v/v ratio) medium mixture improve growth indices and quality properties of poinsettia.

چکیده انگلیسی:

بنت­­ قنسول(Euphorbia pulcherrima) گیاهی گلدانی است که براکته‌های رنگین آن در روزهای کوتاه تشکیل می­شود. در این تحقیق اثر غلظت­های مختلف نیتروژن (180، 230، 280 و330 میلی‌گرم بر لیتر) و بسترهای کشت (پیت ماس و پرلیت به نسبت 1:2 و کوکوپیت و پرلیت به نسبت 1:2) بر برخی صفات گیاه بنت قنسول رقم ’نوئل‌رد‘ مطالعه شد. این آزمایش به­صورت فاکتوریل در قالب طرح کاملا تصادفی با 8 تیمار و 3 تکرار اجرا گردید. نتایج حاصل از بررسی صفات اندازه‌گیری شده نشان داد که بیشترین میزان ارتفاع، قطر تاج بوته و میزان نیتروژن در غلظت 230 پی‌پی‌ام و بستر کوکوپیت + پرلیت ایجاد شدند. غلظت 230 میلی‌گرم بر لیتر نیتروژن سبب افزایش میزان وزن تر ساقه و ریشه نسبت به سایر تیمارها شد. غلظت 280 میلی‌گرم بر لیتر نیتروژن و کوکوپیت + پرلیت باعث بیشترین مقدار وزن خشک ساقه شد. تیمار پیت‌ماس + پرلیت و330 میلی‌گرم بر لیتر نیتروژن باعث ایجاد حداکثر مقدار میزان کلروفیل a و آنتوسیانین براکته شد. براساس نتایج پژوهش حاضر غلظت 230 و 280 میلی‌گرم بر لیتر نیتروژن و بستر کوکوپیت موجب بهبود شاخص­های رشدی و در نتیجه بهبود خصوصیات کیفی بنت قنسول شده است.

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