برآورد ارزش اقتصادی و مقایسۀ ذخیرۀ کربن در رویشگاه‌های مختلف جنگلی استان کهگیلویه و بویراحمد

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار، بخش تحقیقات جنگل‌ها، مراتع و آبخیزداری، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان کهگیلویه و بویراحمد، سازمان تحقیقات، آموزش و ترویج کشاورزی، یاسوج، ایران

2 2استادیار، بخش تحقیقات منابع طبیعی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان چهارمحال و بختیاری، سازمان تحقیقات، آموزش و ترویج کشاورزی، شهرکرد، ایران

3 دانشیار، بخش تحقیقات جنگل، مؤسسۀ تحقیقات جنگل‌ها و مراتع کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران

10.22034/ijf.2021.276293.1767

چکیده

جنگل‌ها از اکوسیستم‌هایی هستند که با انبوهی از ترسیب کربن اتمسفر سالانه در زی‌تودۀ گیاهان چوبی و خاک، تأثیر مهمی در کاهش غلظت دی‌اکسید کربن اتمسفر دارند. سه عامل تعیین‌کنندۀ ذخیرۀ کربن هر رویشگاه جنگلی عبارت است از خاک، پوشش گیاهی و لاشریزه. در این پژوهش برای محاسبۀ ذخیرۀ کربن در جنگل‌های بلوط شهرستان‌های بویراحمد و دنا در اقلیم سردسیر استان کهگیلویه و بویراحمد، پس از جنگل‌گردشی، چهار قطعه‌‌نمونۀ یک هکتار مربعی در چهار رویشگاه معرف جنگل‌های استان انتخاب و متغیرهای مورد نظر (قطر برابرسینه، قطر جست‌گروه، ارتفاع و سطح تاج پوشش) آماربرداری شد. به‌منظور برآورد زی‌توده و ذخیرۀ کربن گونه‌های درختی متناسب با فرم رویشی (دانه‌زاد و شاخه‌زاد)، از معادلات آلومتریک مربوط استفاده شد. برای اندازه‌گیری ذخیرۀ کربن خاک نیز در هر قطعه‌نمونه، پنج نمونه خاک از عمق صفر تا 30 سانتی‌متری برداشت و درصد کربن آلی و وزن مخصوص ظاهری در آزمایشگاه اندازه‌گیری شد. نتایج تجزیۀ واریانس مقایسۀ ذخیرۀ کربن درختان حاکی از اختلاف آماری معنی‌دار بین رویشگاه‌های مختلف بود، به‌نحوی که رویشگاه پریکدون با 31 تن در هکتار بیشترین و رویشگاه قرق با 17 تن در هکتار کمترین مقدار را به خود تخصیص دادند. میانگین ذخیرۀ کربن لاشریزه 730 کیلوگرم در هکتار و ارزش اقتصادی ذخیرۀ کربن در هر هکتار از رویشگاه‌های تحت بررسی، 188 میلیون تومان برآورد شد. مجموع میانگین ذخیرۀ کربن خاک، پوشش گیاهی و لاشریزه در مناطق تحت مطالعه بیش از 159 تن در هکتار برآورد شد، به‌طوری‌ که منطقه (قرق) دارای بیشترین و رویشگاه سرآبتاوه (دامنۀ شمالی) دارای کمترین مقدار بودند.

کلیدواژه‌ها


عنوان مقاله [English]

The economic value and comparison of carbon storage in different forest areas in Kohgiluyeh and Boyer-Ahmad province

نویسندگان [English]

  • Y Askarii 1
  • Y Iranmanesh 2
  • M Pourhashemi 3
1 Assistant Prof., Research Division of Forest, Rangeland and Watershed, Kohgiluyeh and Boyerahmad Agriculture and Natural Resources Research and Education Center, AREEO, Yasouj, I. R. Iran.
2 Assistant Prof., Research Division of Natural Resources, Chaharmahal and Bakhtiari Agriculture and Natural Resources Research and Education Center, AREEO, Shahrekord, I. R. Iran
3 Associate Prof., Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO), Tehran, I. R. Iran
چکیده [English]

Forests as one of the important ecosystems plays a noticeable role in reducing the carbon dioxide by the  annual atmospheric carbon sequestration into the biomass of woody plants and soil. The three determining factors for estimating the carbon storage in a forest ecosystem are soil, vegetation, and litters. This study was carried out to investigate the carbon storage and its sequestration in four 1 ha square sample plots in forests of Boyer-Ahmad and Dena counties, Kohgiluyeh and Boyer-Ahmad province. Relevant allometric equations were used to estimate the biomass and carbon storage of the tree species in two vegetative form of coppice and high forests. For the measurement of soil carbon storage, five soil samples were taken from depths of 0- 30 cm, and percentage of organic matter and bulk density were measured in the laboratory. Analysis of variance showed that the total carbon storage in the trees, soil and litter had no significant difference amongst different sites, but the total carbon storage among the trees showed a significant difference (Parikadon site with 31 and Vezg site with 17 tons/ha, respectively). According to the results, the enclosed area (Vezg) had the highest carbon storage and the Sarabtaveh (northern aspect) had the lowest carbon storage. The average carbon storage of the studied areas was more than 159 tons/ha. The average of carbon storage in litters was about 730 kg/ha and the mean economic value of total carbon storage per ha was estimated 188 million Tomans.

کلیدواژه‌ها [English]

  • Allometric equations
  • Biomass
  • Growth form
  • Litter
  • Soil
  • Vegetative form
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