بررسی پاسخ های رشدی بخش هوایی و زیرزمینی گل لیزیانتوس تحت افزایش گاز گلخانه ای دی اکسید کربن در کشت هیدروپونیک

نوع مقاله : مقالات پژوهشی

نویسندگان

دانشگاه فردوسی مشهد

چکیده

افزایش دی‌اکسید‌کربن اتمسفر به عنوان یکی از مشخصه‌های تغییر اقلیم به میزان زیادی بر بهره‌دهی جهانی، بخش کشاورزی اثر می-گذارد. بنابراین هدف از انجام این پژوهش بررسی اثرات افزایش گاز گلخانه‌ای دی‌اکسید‌کربن بر پاسخ رشدی اندام‌های هوایی و زیرزمینی دو رقم گل لیزیانتوس در شرایط کشت هیدروپونیک است. این تحقیق در گلخانه تحقیقاتی دانشکده کشاورزی، دانشگاه فردوسی مشهد، در قالب آزمایش کرت‌های خرد شده بر پایه طرح کاملاً تصادفی با سه تکرار انجام شد. تیمارها شامل سه غلظت دی‌اکسید‌کربن ۳۸۰ به عنوان شاهد، ۷5۰ و ۱۰۵۰ پی‌پی‌ام و دو رقم گل شاخه بریده لیزیانتوس Yolde White و GCREC-Blu بود. با توجه به نتایج می‌توان این‌گونه بیان داشت که اثر تیمار دی‌اکسید‌کربن بر ارتفاع، طول میانگره، وزن خشک ساقه و ریشه، سطح و حجم ریشه و نسبت ریشه به ساقه در سطح احتمال 1 درصد معنی‌دار شد و در بین دو رقم تنها از نظر وزن خشک ساقه، تفاوت معنی‌داری در سطح احتمال 5 درصد مشاهده شد. اثر متقابل دی‌اکسید‌کربن و رقم بر روی هیچ یک از صفات مورد مطالعه تأثیر معنی‌داری نداشت. در یک نگاه کلی، افزایش دی‌اکسید‌کربن موجب افزایش تمامی پارامترهای رشدی بخش هوایی و زیرزمینی گیاه لیزیانتوس شد و بیشترین و کمترین تأثیر در تمامی صفات به ترتیب مربوط به غلظت 1050 پی‌پی‌ام و شاهد بود. در نتیجه تغییرات گاز دی‌اکسید‌کربن در اتمسفر می‌تواند تأثیرات بسیار چشمگیری بر روی گیاه بگذارد که بدین ترتیب می‌توان برخی اثرات تغییر اقلیم در آینده را بر روی کیفیت تولید تجاری گل‌های شاخه بریده پیش‌بینی و بررسی نمود.

کلیدواژه‌ها


عنوان مقاله [English]

Growth Response of Aboveground and Belowground of Eustoma grandiflorum to Elevated Co2 in Hydroponic Culture

نویسندگان [English]

  • mahin nikoo
  • Mahmoud Shoor
  • Ali tehranifar
  • Elham Saeedi pooya
Ferdowsi University of Mashhad
چکیده [English]

Introduction: One of the climate change sign is variation in greenhouse gases in the Earth's atmosphere. Carbon dioxide is the most important greenhouse gas that is released into the atmosphere by humans. It is expected that addition of carbon dioxide could effect the energy balance and global climate. Climate change is effective on agricultural productions. It is clear that different plants have different responses to Co2 variation. These responses are consisting of yield, growth characteristic and variation in root/shoot ratio of plants. On the other hand, using growing media are expanding for plants because of their advantages such as plants nutrient control, reducing the incidence of diseases and pests and increasing the quantity and quality rather than soil cultivation. Properties of various materials as substrates influence directly or indirectly on plant growth and crop production., Hydroponic method can be considered as one of the important methods to optimize water use in agriculture, especially in many countries are located in arid and semi-arid regions that have water crisis. Lisianthus is one of the most beautiful flowers with folded petals in white, blue and purple. I-ts scientific name is Eustoma grandiflorum from the family of Gentianaceae and native to North America. It has variety of annual, biennial or short-lived perennial. The aim of this study was to explore the effect of Co2 enrichment on growth response of aboveground and belowground of Eustoma grandiflorum under increasing of Co2 greenhouse gases in hydroponic culture.
Materials and Methods: The experiment was done as a split-plot based on completely randomized experimental design with three replications at greenhouse of Ferdowsi University of Mashhad. The treatments were consists of three concentrations of carbon dioxide (380 as controls, 750 and 1050 ppm) as main plots and two cultivars Yodel white and GCREC-blue as subplots. Some characteristic such as plant height, internode length, root volume, root area, root and shoot dry weight were measured. Data were analyzed by JMP software Version 8 using analysis of variance (ANOVA) and significant differences between means were determined by using LSD test at P < 0.05.
Results and Discussion: The results of analysis of variance indicated that the effect of Co2 treatment was significant (p

کلیدواژه‌ها [English]

  • Greenhouse Gases
  • Internode
  • Weight
  • Hydroponic
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