ارائه روشی کارآمد در محاسبه قطر یقه درختان شاخه‏ زاد بلوط ایرانی در جنگل‏ های خشک و نیمه‏‏ خشک زاگرس

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار، بخش مدیریت مناطق بیابانی، دانشکده کشاورزی، دانشگاه شیراز، شیراز، ایران

2 دانشجوی کارشناسی ارشد، بخش مدیریت مناطق بیابانی، دانشکدة کشاورزی، دانشگاه شیراز، شیراز، ایران

چکیده

قطر از مشخصه‏ های مهم در آمار جنگل است که ارائه روشی مناسب برای اندازه‏ گیری آن، به‌ویژه در درختان شاخه‏ زاد، اهمیت زیادی دارد. به این موضوع در جنگل‏ های زاگرس ـ که بخش بیشتر آن‌ها را درختان شاخه‏ زاد تشکیل می‏دهند ـ باید بیشتر توجه شود. بنابراین، این پژوهش با هدف دست‌یابی به روشی کارآمد در محاسبه قطر یقه در درختان شاخه ‏زاد بلوط ایرانی ـ از مهم‌ترین گونه ‏های جنگل‏ های زاگرس ـ انجام شده است. بدین‌منظور، در 235 درخت شاخه ‏زاد بلوط ایرانی در دشت برم استان فارس، قطر یقه به دو روش، و مساحت و ارتفاع تاج و ارتفاع درختان اندازه‏ گیری شدند. نتایج نشان داد میانگین قطر یقه با روش اول (69/12 ± 06/24 سانتی‏متر) با روش دوم (22/7 ± 03/13 سانتی‏متر) از نظر آماری متفاوت بوده و همبستگی معنی‏دار بیشتری با سایر ویژگی‏ های زیست‏‏سنجی درختان دارد. بنابراین، می‏توان نتیجه گرفت روش اول استفاده‌شده در این پژوهش، روشی کارآمد در محاسبۀ قطر درختان شاخه زاد بلوط ایرانی در منطقه مورد تحقیق است. همچنین، توصیه می‏‏شود این روش در سایر درختان شاخه‏ زاد جنگل ‏های زاگرس ارزیابی شود تا در صورت تأیید، برای کل جنگل‏ های زاگرس به‏ صورت یک دستورالعمل واحد استفاده شود.

کلیدواژه‌ها

عنوان مقاله [English]

An Efficient Method in Diameter at Root Collar Measurement of Persian Oak Coppice Trees in Zagros Dry Forests, Iran

نویسندگان [English]

  • Seyed Yousef Erfanifard 1
  • Hamid Soleimani 2
1 Assistant Professor, Department of Desert Management, College of Agriculture, Shiraz University, Shiraz, I.R. Iran
2 M.Sc. Student, Department of Desert Management, College of Agriculture, Shiraz University, Shiraz, I.R. Iran
چکیده [English]

Diameter is such a notable characteristic in forest inventory that it is important to have a suitable
method of its measurement, especially in coppice trees. This seems more important in Zagros forests
that most of them are covered with coppice trees. So this research was aimed to find an efficient
method in studying the diameter at root collar (DRC) of Persian Oak coppice trees as the most
important species in Zagros forests. For this purpose, DRC by two methods, crown area and height
and tree height were measured in 235 Persian Oak coppice trees. The results showed that the average
of DRC by the first method (24.06±12.69 cm) was significantly different from the second method
(13.03±7.22 cm) and it had higher significant correlation with other characteristics. Also the linear
relation between DRC by two methods and other characteristics showed the higher significant
correlation of the DRC measured with the first method. So it is concluded that the first method applied
in this research is an efficient method in DRC studies in Persian Oak coppice trees of the study area.
Also it can be recommended to assess this method in other coppice trees of Zagros forests and if
proved, it can be applied to all coppice trees in Zagros forests.

کلیدواژه‌ها [English]

  • Coppice
  • Correlation
  • diameter at root collar
  • Persian Oak
  • Zagros

مراجع

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