ارزیابی ویژگی‌های رویشی بذر و نونهال بلوط‌های گروه Quercus libani

نوع مقاله : علمی- پژوهشی

نویسندگان

1 هیات علمی، موسسه تحقیقات جنگلها و مراتع کشور

2 کارشناس ارشد پژوهش، موسسه تحقیقات جنگلها و مراتع کشور

چکیده

جنس بلوط از مهمترین جنس‌های درختی جنگل‌های ایران است که بیشترین تنوع گونه‌ای آن در جنگل‌های زاگرس شمالی قابل‌مشاهده است. در رده‌بندی نوین بلوط‌های ایران که براساس ویژگی‌های ریزریخت‌شناسی برگ و دانه گرده انجام شد، از گروه Quercus libani پنج گونه تأیید شدند که عبارتند از: Q. libani، Q. carduchorum ، Q. magnosquamata، Q. ophiosquamata و Q. apiculata. در این پژوهش در راستای تکمیل مطالعات پیشین، بذر پنج گونه یاد شده پس از شناسایی، از رویشگاه‌های طبیعی آنها در جنگل‌های بانه استان کردستان جمع‌آوری شد و پس از انتقال، در محیط گلخانه در شرایط یکسان کاشته شدند تا ارزیابی دقیق‌تری از صفات رویشی بذر آنها به‌دست آید. پس از جمع‌آوری بذرهای هر گونه از سه رویشگاه مختلف، بذرها در سه تکرار 50 تایی و در قالب آماری طرح کاملاً تصادفی کاشته شدند و سپس اندازه‌گیری صفات موردنظر در طول دوره رویش انجام شد. نتایج نشان داد که بین گونه‌های موردمطالعه ازنظر صفات طول بذر، پهنای بذر و سرعت جوانه‌زنی در سطح اطمینان 99 درصد و ازنظر صفات ارتفاع نونهال، وزن تر ساقه، وزن خشک ساقه، وزن خشک ریشه و زی‌توده کل در سطح اطمینان 95 درصد اختلاف معنی‌دار وجود دارد. پس از ترسیم نمودار درختی حاصل از تحلیل خوشه‌ای نیز مشخص شد که گونه  Q.carduchorum به‌تنهایی در یک گروه و سایر گونه‌ها در گروه دیگری دسته‌بندی می‌شوند.

کلیدواژه‌ها

عنوان مقاله [English]

Evaluation of acorn vegetative characteristics of Ouercus libani complex

نویسندگان [English]

  • Parisa Panahi 1
  • Mahnoush Rezaei 2
  • Mehdi Pourhashemi 1
  • Maryam Hasaninejad 2
1 Assistant Prof., Botany Research Division, Research Institute of Forests and Rangelands, Tehran, ‎I.R. Iran
2 Associate Prof., Forest Research Division, Research Institute of Forests and Rangelands, Tehran, I.R. Iran.‎
چکیده [English]

Northern Zagros Forests has remarkable diversity of oaks (Quercus sp.) as one of the most important tree species in Iran. Based on the modern taxonomy of this genus, five species of Q. libani, Q. carduchorum, Q. ophiosquamata, Q. magnosquamata and Q. apiculata were recognized form Q. libani complex. In order to complete the previous studies, here we evaluated the vegetative characteristics of acorns for those five species. Acorns of studied species were gathered from native forest stands of Baneh Forests in Kurdistan province. The acorns were then planted in a fully-identical condition in greenhouse. A completely randomized statistical design with three replications and 50 acorns per replication was used for statistical analysis. The results showed that the acorn length, acorn width and germination rate were significantly different (p < 0.01) amongst the five species. Furthermore, seedling height, wet and dry mass of stem, dry mass of root and total biomass of seedlings showed significant differences (p < 0.05) amongst the five species. Based on cluster analysis, Q. carduchorum was separated from other species and categorized in different category.

کلیدواژه‌ها [English]

  • seedling height
  • Acorn
  • germination rate
  • Kurdistan

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