ارزیابی کارایی جذب آب و رشد گیاهان زینتی رعنا زیبا و مارگریت در بسترهای متفاوت کشت

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج، ایران

2 دانشجوی سابق کارشناسی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج، ایران

3 دانشجوی سابق کارشناسی ارشد، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج، ایران

چکیده

این تحقیق با هدف ارزیابی رشد گیاه رعنا زیبا (Gaillardia grandiflora) و مارگریت  (Leucanthemum × superbum) در بستر کشت با نسبت­های حجمی متفاوت از خاک مزرعه با بافت رسی لومی و پیت ماس (نسبت پیت ماس به خاک: 100درصد پیت، 80درصد پیت + 20درصد خاک، 60درصد پیت + 40درصد خاک، 20درصد پیت + 80درصد خاک و 100درصد خاک) در قالب طرح بلوک­های کامل تصادفی با سه تکرار در شرایط گلخانه­ای در گروه علوم باغبانی دانشگاه تهران انجام گرفت. آبیاری بر پایۀ نیاز هر گیاه (به روش توزین) تا پایان آزمایش انجام شد و ارزیابی صفات با دو مرحله برداشت گیاه بین دو فاصلۀ زمانی مشخص صورت گرفت. سرعت جذب آب، نیاز آبی، ویژگی‌های رویشی اندام‌های هوایی و ریشه ارزیابی شد. صفات ریشه در گیاه رعنا زیبا به­طور معنی‌داری  توسعه یافته­تر از گیاه مارگریت بود و به همین ترتیب کارایی جذب آب آن نیز بیشتر بود. ترکیب 60-40درصد پیت با خاک مزرعه ضمن توسعۀ شبکۀ ریشه سبب افزایش معنی­دار کارایی جذب آب و کاهش نیاز آبی گیاه شد. بنابراین، ترکیب پیت با خاک مزرعه به میزان دست‌کم 20درصد در تولید و پرورش نشاء گیاهان باغچه­ای رعنا زیبا و مارگریت قابل توصیه است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Evaluation of water uptake efficiency and growth of ornamental Gaillardia (Gaillardia grandiflora) and Marguerite (Leucanthemum × superbum) in different substrates

نویسندگان [English]

  • Azizollah Khandan-Mirkohi 1
  • Hadiseh Fayyaz 2
  • Alireza Moshrefi Eraqi 3
1 Assistant Professor, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
2 Former B. Sc. Student, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
3 Former M. Sc. Student, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
چکیده [English]

This study aimed to assess the water demand and growth traits of ornamental Gaillardia (Gaillardia grandiflora) and Marguerite (Leucanthemum × superbum) in peat-based substrates with different volume based ratios of field soil (Clay loam) and peat moss (100% peat, 80% peat + 20% soil, 60% peat + 40% soil, 20% peat + 80% soil and 100% soil) in a randomized complete block design with three replications in a greenhouse at the horticulture Department, University of Tehran. Irrigation applied based on plant demand (by weight) up to the end of the experiment, but the evaluation of the harvest took place between two specified intervals. The amount of water consumed, growth characteristics, shoot and root dry weight and root development traits were evaluated. Overall study results showed the root system of Gaillardia was more developed than Marguerite, so it was also more efficient in water uptake. Combining 40-60% (v/v) of peat with field soil resulted in progress of the root system and significantly increased the efficiency of water absorption. Therefore, the combination of at least 20% of peat with field soil is recommended with in the production and cultivation of garden plants (Gaillardia and Marguerite).

کلیدواژه‌ها [English]

  • Bedding plants
  • Clay Soil
  • landscape
  • root system
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