ارزیابی عملکرد بهره‌برداران محلی گلاجارها در زاگرس شمالی

نوع مقاله: علمی - پژوهشی

نویسندگان

1 گروه جنگل داری، دانشکده منابع طبیعی، دانشگاه کردستان، ستتدج، ایران

2 دانشیار گروه جنگل داری، دانشکده منابع طبیعی، دانشگاه کردستان، ستتدج، ایران

3 پژوهشگر گروه تعاملات اکولوژیک-اجتماعی در بوم سازگان های کشاورزی، دانشگاه گوتینگن و دانشگاه کاسل، آلمان

چکیده

هدف این پژوهش، ارزیابی عملکرد بهره‌برداران محلی گلاجارها با استفاده از نمایه‌های زیست‌سنجی (ارتفاع کل، ارتفاع تاج، سطح تاج و نسبت ارتفاع تاج به ارتفاع کل) گونۀ‌ وی‌ول (Quercus libani Oliv.) است. برای انجام این پژوهش، سه گلاجار با شرایط فیزیوگرافی تا حدودی مشابه و سن گلازنی یکسان (گذشت چهار سال از انجام آخرین گلازنی) انتخاب شد. در گلاجارهای انتخاب­شده با انجام آماربرداری صد‌در‌صد، مشخصۀ‌ قطر یقه برای تمام درختان (قطر یقه ≥ 5 سانتی‌متر) مورد اندازه‌گیری قرار گرفت. برای درختان وی‌ول، به­عنوان یکی از گونه‌های اصلی در گلاجارهای بررسی‌شده، جدای از قطر، ارتفاع کل، ارتفاع تنه و دو قطر کوچک و بزرگ تاج در دو جهت عمود بر­هم نیز اندازه‌گیری شد. نتایج، حاکی از وجود تفاوت معنی‌دار از­نظر نمایه‌های زیست‌سنجی (ارتفاع کل، ارتفاع تاج، سطح تاج و نسبت ارتفاع تاج به ارتفاع کل) است که تأیید­کننده‌ عملکرد متفاوت بهره‌برداران محلی در انجام گلازنی و امکان استفاده از نمایه‏های زیست‏سنجی برای ارزیابی عملکرد آن­ها است.

کلیدواژه‌ها


عنوان مقاله [English]

Impact assessment of local users of pollarded stands on Northern Zagros forests

نویسندگان [English]

  • Abdolla Naderi 1
  • Loghman Ghahramany 2
  • Hedayet Ghazanfari 2
  • zahed shakeri 3
1 Department of Forestry, Faculty of Natural Resources, University of Kurdistan, Sanandaj, Iran
2 Department of Forestry, Faculty of Natural Resources, University of Kurdistan, Sanandaj, Iran
3 Social-Ecological interactions in Agricultural Systems, University of Goettingen and University of Kassel, Germany.
چکیده [English]

The aim of this study was to evaluate the performance of local users on pollarded oak stands. For this purpose, biometric indices (total height, trunk height, crown height, crown area and crown height to total height ratio) of Quercus libani Oliv. trees were used. Three pollarded stands with similar physiographic conditions and the same pollarded age (four years after pollarding) under the traditional management of three different local users were selected. In the selected pollarded stands, using 100% inventory, collar diameter for all trees (collar diameter ≥ 5 cm) were measured. For the Quercus libani trees, in addition to collar diameter, total height, trunk height and two small and large crown diameters in the two perpendicular directions were measured. The results indicate a significant difference in terms of biometric indices (i.e. total height, crown height, crown area and crown height to total height ratio), which confirms the different behavior of local foresters in performing pollarding and the possibility of using these biometric indices to evaluate the performance of local users.

کلیدواژه‌ها [English]

  • Local forester
  • Pollarding
  • Traditional management
  • Biometric indices
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