نوع مقاله : علمی - پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد گیاهان زینتی، دانشکده کشاورزی، دانشگاه شهید چمران اهواز، اهواز

2 دانشیار، گروه علوم باغبانی، دانشکده کشاورزی، دانشگاه شهید چمران اهواز، اهواز، ایران

3 دانشیار گروه علوم باغبانی، دانشکده کشاورزی، دانشگاه شهید چمران اهواز، اهواز

چکیده

چکیده
ژربرا یکی از مهم‌ترین گل‌های بریدنی جهان است که تولید آن رو به افزایش می‌باشد. یکی از مشکلات عمده در پرورش گل ژربرا، خمیدگی گردن و عمر پس از برداشت آن می‌باشد. با توسعه روزافزون صنعت گلکاری و لزوم افزایش کمیت و کیفیت گل، لازم است از عناصر سودمند در تولید گل‌ها استفاده شود. کلسیم، یکی از عناصر پرمصرف مهم می‌باشد.با استفاده از نانو ذرات می‌توان کاربرد کودهارا کنترل شده‌تر و آزادسازی عناصر را با تأخیر زمانی مطلوبی فراهمنمود. پژوهش حاضر به‌صورت کشت گلدانی از پاییز سال 1395 تا بهار سال 1396 در مجتمع گلخانه‌های دانشکده کشاورزی دانشگاه شهید چمران اهواز و به منظور بررسی اثرات غلظت‌های مختلف نانو کلات کلسیم بر خصوصیات رشدی، فیزیولوژیکی، بیوشیمیایی و عمر پس از برداشت گل ژربرا صورت گرفت. این پژوهش با استفاده از محلول‌پاشی سه غلظت نانوکلات کلسیم (صفر، 2 و 3 گرم در لیتر) روی سه رقم گل ژربرا به‌صورت فاکتوریل در قالب طرح پایه بلوک‌های کامل تصادفی در سه تکرار و  به اجرا درآمد و در پایان صفات مورفولوژیکی، فیزیولوژیکی، بیوشیمیایی و ماندگاری این ارقام بررسی شد. نتایج نشان داد که با افزایش غلظت نانو کلات کلسیم صفات مورفولوژیکی مرتبط با گل به‌طور معنی‌داری بهبود یافت. کاربرد نانو کلات کلسیم باعث افزایش میزان کلروفیل و کلسیم بافت ساقه گل‌دهنده و همچنین باعث کاهش نشت‌یونی گردید. افزایش غلظت نانو کلات کلسیم در ماندگاری و جذب آب گل‌آذین ژربرا مؤثر بود. پاسخ ارقام به نانو کلات کلسیم بر اساس صفات اندازه‌گیری‌شده متفاوت بود. در بین تیمارهای به کاررفته، غلظت 3 گرم در لیتر با افزایش ماندگاری گل و بهبود صفات رشدی، فیزیولوژیکی و بیوشیمیایی گل به‌عنوان بهترین تیمار شناخته شد.
 
کلیدواژه‌ها: کشت هیدروپونیک، ماندگاری، نانو ذرات کلسیم

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

The Effect of Calcium Nanochelate on Morphological, Physiological, Biochemical Characteristics and Vase Life of Three Cultivars of Gerbera under Hydroponic System

نویسندگان [English]

  • soraya moallaye mazraei 1
  • Mehrangiz Chehrazi 2
  • Esmaeil Khaleghi 3

1 M.Sc. Student of Ornamental Plants, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran

2 Associate Proffesor, Department of Horticultural Science, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran

3 Associate proffesor, Department of Horticultural Science, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran

چکیده [English]

Abstract
 
Background and Objectives
Gerbera (Gerbera jamesonii L.) is one of the most important cut flowers in the world, and its production is increasing. One of the major problems in cultivating gerbera is its bent neck and short vase life. With the ever-increasing development of flowering industry and the necessity of improving the quantity and quality of flowers, it is necessary to use the beneficial elements in the production of flowers. Calcium is one of the most important nutrient elements that plays a major role in plants. It has a crucial task in the stability of cell wall and cell membrane as well as the development of cells. The balance between cations and anions, the activation of certain enzymes and the regulation of osmotic pressure are among other functions of this element. Calcium, also, plays a role in root development and prevents injuries caused by mechanical and thermal damages such as wind. Nanochelate technology has been able to significantly solve chelate problems. The present study was conducted to investigate the effects of various concentrations of calcium nanochelate on quantitative and qualitative characteristics and vase life of Gerbera.
 
Materials and Methods
In this study, three concentrations of calcium nano-chelate (0, 2 and 3 g/l) on three cultivars of gerbera cut flower (Intense, Amlet and Cabana) were examined. Factorial experiment was conducted in a randomized complete blocks design with three replications. In this experiment, morphological, physiological, biochemical parameters and postharvest life of these cultivars were evaluated. The related characteristics of the flower included the dry weight of the scape, the number of inflorescences per plant, the height of the flowering stem, the diameter of the scape and the diameter of the inflorescence. The percentage of electrolyte leakage or membrane stability index, chlorophyll and carotenoids content, calcium content of the plant, vase life and water absorption were investigated.
 
Results
The results showed that morphological traits improved with increasing the concentration of calcium nano-chelate. Also, chlorophyll and stomatal conduction increased, but ion leakage decreased. Increasing the concentration of calcium nano-chelate increased the vase-life and water absorption in gerbera flower. The highest number of inflorescence, scape diameter, scape dry weight, inflorescence dry weight and vase life were obtained with 3 g / L of calcium nano-chelate.
 
Discussion
In this research, we found that gerbera treatment by calcium nano-chelate was significantly effective. Among the treatments, the concentration of 3 g/l was recognized as the best treatment by increasing the vase life and improving the growth, physiological and biochemical characteristics of gerbera cut flower.
 

کلیدواژه‌ها [English]

  • Calcium nanochelate
  • Hydroponic system
  • Vase life
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