اثر آللوپاتی برگ درخت شب‌خسب (Albizia julibrissin Durazz.) بر ویژگی‌های بیوماس نهال عرعر (Ailanthus altissima Mill.)

نوع مقاله : مقاله پژوهشی


1 نویسنده مسئول، استادیار، دانشکده کشاورزی و منابع طبیعی اهر، دانشگاه تبریز، تبریز، ایران

2 استادیار، دانشکده کشاورزی و منابع طبیعی اهر، دانشگاه تبریز، تبریز، ایران


به‌منظور بررسی اثر آللوپاتیک برگ درخت شب‌خسب (Albizia julibrissin) بر روی ویژگی‌های بیوماس نهال گونه عرعر(Ailanthus altissima)، آزمایشی در قالب طرح کاملاً تصادفی با هشت تکرار اجرا شد. تیمارهای آزمایشی شامل سطوح مختلف پودر برگ درخت شب‌خسب در غلظت‌های صفر، 5/2، 5 و 5/7 درصد بود. به‌منظور بررسی اثر آللوپاتی بر جوانه‌زنی بذور از شاخص سرعت سبز شدن و بر بیوماس نهال از اندازه‌گیری پارامترهای قطر یقه، وزن تر و خشک نهال، وزن ‌تر و خشک ریشه، تعداد برگچه، شاخص بنیه وزنی نهال و شاخص درصد آب بافت استفاده شد. نتایج نشان داد که شاخص جوانه‌زنی بذر، وزن خشک نهال، وزن تر و خشک ریشه و شاخص بنیه وزنی نهال به‌طور معنی‌داری در غلظت‌های مختلف عصاره برگ شب‌خسب نسبت به حالت شاهد کاهش یافتند اما افزایش غلظت تأثیر معنی‌داری بر این ویژگی‌ها نداشت. غلظت‌های بالاتر عصاره برگ شب‌خسب اثرات بازدارندگی قوی‌تری بر ویژگی‌های قطر یقه نهال ، وزن تر نهال و تعداد برگچه در هر نهال داشت. پژوهش حاضر اثر آللوپاتی عصاره برگ شب‌خسب بر ویژگی‌های بیوماس نهال‌های عرعر را قوت بخشید و می‌توان از اثر آللوپاتی بقایای برگ شب‌خسب به‌منظور کنترل و مدیریت علف‌های هرز در اکوسیستم‌های اگروفارستری بهره جست، که این امر مستلزم بررسی‌های تکمیلی است. بنابراین در یک جنگلکاری چند کشتی، گونه شب‌خسب نباید بدون مطالعه همراه با سایر گونه‌ها کاشته شود زیرا به استناد نتایج پؤوهش حاضر دارای مواد آللوپاتیک است.


عنوان مقاله [English]

Allelopathic Effects of Persian silk tree (Albizia julibrissin) on Seedling Biomass Attributes of Tree of Heaven (Ailanthus altissima)

نویسندگان [English]

  • Roya Abedi 1
  • sakineh abdi 2
1 department of forestry, university of Tabriz
2 Ahar faculty of agriculture and natural recourse , University of Tabriz
چکیده [English]

The current study evaluated the allelopathic potential of the Persian silk tree (Albizia julibrissin) leaf residues on seed germination and biomass attributes of the Tree of heaven (Ailanthus altissima) seedlings. An experiment was conducted based on a completely randomized design by eight replications. Experimental treatments consisted of different levels of leaf residues at concentrations of 0%, 2.5%, 5%,and 7.5%.Germination index was used in order to investigate the effect of allelochemicals on seeds germination. In addition, the effect of allelopathic materials on seedling biomass was measured by calculating the parameters of collar diameter, fresh and dry weight of seedlings, root dry weight, number of leaves, seedling weight vigor index and percentages of seedling water content index. The results revealed that seed germination index, seedling dry weight, seedling fresh and dry root weight and seedling weight vigor index significantly decreased at different concentrations of leaf residues compared to control, but the increase in concentration had no significant effect on these attributes. But higher concentrations of leaf residues had stronger inhibitory effects on seedling collar diameter, fresh seedling weight and the number of leaves per seedling. The present study clearly proved the allelopathic effects of the Persian silk tree (Albizia julibrissin) leaf residues on biomass attributes of the Tree of heaven (Ailanthus altissima) seedlings. In addition, the Persian silk tree (Albizia julibrissin) leaf residues can be used to control the irregular growth of Tree of heaven seed as an invasive species, as well as weed management in agroforestry systems which require further studies.

کلیدواژه‌ها [English]

  • Allelopathy
  • Germination
  • Germination index
  • Seedling water content index
  • Weight vigor index
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