همکاری با انجمن علمی مدیریت و کنترل مناطق بیابانی ایران

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد رشته مرتعداری، 'گروه مرتعداری، دانشگاه تربیت مدرس، ایران

2 دانشیار گروه مرتعداری، دانشکده منابع طبیعی، دانشگاه تربیت مدرس، ایران

3 دانشیار پژوهش، بخش تحقیقات جنگل و مرتع، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان مازندران، سازمان تحقیقات، آموزش و ترویج کشاورزی، ساری، ایران

چکیده

تحقیق حاضر به منظور بررسی تأثیر تاج پوشش سه گونه­ی چوبی بادام کوهی(Amygdalus scoparia)، دافنه (Daphne mezereum) و آبنوس (Ebenus stellata) بر ترکیب و تراکم بانک بذر خاک زیر اشکوب آن­ها در اوایل پاییز 1396 بعد از اتمام فصل رشد گیاهان و ریزش بذر آن­ها در مراتع روستای چنارناز استان یزد مورد مطالعه قرار گرفت. پانزده پایه از هرکدام از گونه­های چوبی مذکور انتخاب گردید و از زیر تاج پوشش گونه­ها­ی چوبی همراه با یک تیمار کنترل در بیرون تاج پوشش از عمق 5-0 سانتی­متر، توسط اوگری به قطر 5 سانتی­متر اقدام به برداشت نمونه­های خاک شد. تراکم و ترکیب بانک بذر خاک در نمونه­ها با کشت در گلخانه اندازه گیری شد. نتایج آنالیز واریانس یک‌طرفه نشان داد که تراکم کل بانک بذر در زیر تاج پوشش سه گونه­ی چوبی A. scoparia (با میانگین 17/1133 بذر در مترمربع)، D. mezereum (با میانگین 10/823 بذر در مترمربع)، E. stellata (با میانگین 21/793 بذر در مترمربع) با یکدیگر اختلاف معنی­دار داشتند. بعلاوه تراکم کل بانک بذر در زیر تاج­پوشش سه گونه­ی چوبی مذکور به طور معنی­داری بیشتر از بیرون تاج پوشش (با میانگین 48/134 بذر در مترمربع) بود. همچنین گونه­های با فرم زیستی همی­کریپتوفیت بیشترین فراوانی را در بانک بذر خاک داشتند. نتایج این تحقیق تأثیر مثبت تاج پوشش گونه­های چوبی در مناطق نیمه خشک کشور را بر افزایش تراکم بانک بذر زیر اشکوب نسبت به محیط اطراف و اثر بیشتر A. scoparia بر تراکم بانک بذر زیر اشکوب خود در مقایسه با دو گونه D. mezereum و E. stellata اثبات نمود و بر حفظ این گونه تاکید گردید

کلیدواژه‌ها

عنوان مقاله [English]

The effect of canopy cover of three species on soil seed bank characteristics in the arid regions Case Study: rangelands of Chenarnaz village in Khatam county, Yazd province

نویسندگان [English]

  • Mahboubeh Hadinejad 1
  • Reza Erfanzadeh 2
  • Hasan Qelichnia 3

1 M.Sc. student in rangeland management, Department of Range Management, Faculty of Natural Resources, Tarbiat Modares University, Iran

2 Associate Professor, Department of Range Management, Faculty of Natural Resources, Tarbiat Modares University, Iran

3 Associate Professor, Forest and Rangeland Research Department, Mazandaran Agriculture and Natural Resources Research and Education Center, AREEO, Sari, Iran

چکیده [English]

The persent study was designed to investigate the effect of canopy cover of three woody species, Amygdalus scoparia, Daphne mezereum, Ebenus stellata on the composition and density of soil seed bank under their canopies. Fifteen individuals were selected from each of the woody species in Chenarnaz rangelands, Yazd provimce, Iran in autumn, 2018. then the soil samples were taken from under the canopies of woody species with a control treatment outside the canopy from a depth of 0-5 cm with an auger, 5 cm in diameter. The density and composition of soil seed banks in samples were measured through germination method in the greenhouse. The results of one-way ANOVA showed significant differences of total seed bank densities under A. scoparia (with average 1133.17 seed per m2), D. mezereum (with average 823.10 seed per m2), E. stellata (with average 793.21 seed per m2). In addition, total soil seed bank density was significantly higher than the outside of canpies (with average 134.48 seed per m2). Hemi-cryptophyte was the most frequent in the soil seed bank. The results of this research showed the positive effect of the canopy of woody species in increasing of density of soil seed bank in which A. scoparia showed a great impact on soil seed bank characteristics.

کلیدواژه‌ها [English]

  • soil seed bank
  • density of soil seed bank
  • Amygdalus scoparia
  • Daphne mezereum
  • Ebenus stellata
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