نشریه علمی - پژوهشی مرتع و آبخیزداری

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه مهندسی طبیعت، دانشکده منابع طبیعی و علوم زمین، دانشگاه شهرکرد، شهرکرد، ایران.

2 گروه مهندسی محیط زیست، دانشکده منابع طبیعی و علوم زمین، دانشگاه شهرکرد، شهرکرد، ایران.

10.22059/jrwm.2024.372204.1746

چکیده

ذخیره‌سازی کربن در اکوسیستم‌های زمینی بخش مهمی از ذخیره‌سازی جهانی کربن است و نقشی حیاتی در کاهش تغییرات اقلیمی ایفا می‌کند. پژوهش حاضر با هدف بررسی اثرات انواع کاربری/پوشش زمین بر میزان ترسیب کربن خاک و زیتوده گیاهی به عنوان یک خدمت اکوسیستمی مهم در حوزه آبخیز سفیددشت واقع در استان چهارمحال و بختیاری انجام شد. نمونه‌برداری از خاک و پوشش‌گیاهی به صورت تصادفی- سیستماتیک انجام شد. بدین منظور در هر کاربری، از 60 پلات 4 مترمربعی جهت جمع‌آوری خاک، زیتوده گیاهی و لاشبرگ استفاده شد. زیتوده گیاهی به روش اندازه‌گیری مستقیم نمونه‌برداری شد. نمونه‌های خاک نیز از عمق 0-30 سانتی‌متری و به تعداد 20 نمونه در هر منطقه جمع‌آوری شد. مقایسه بین مناطق با استفاده از آنالیز واریانس یک طرفه و آزمون چند دامنه‌ای دانکن انجام گرفت. نتایج نشان داد در مجموع از منظر ذخیره کربن کل بین مناطق مورد بررسی اختلاف معنی‌داری وجود دارد. ذخیره کربن کل از بیشترین به کمترین به ترتیب شامل مرتع متراکم (42/46 تن بر هکتار)، مرتع نیمه‌متراکم (49/38 تن بر هکتار)، اراضی کشاورزی (62/31 تن بر هکتار)، مرتع کم‌تراکم (12/26 تن بر هکتار) و اراضی بایر (21/17 تن بر هکتار) می‌باشد. ارزش اقتصادی کل ذخیره کربن در هر هکتار از کاربری‌های بررسی شده شامل مراتع متراکم، مراتع نیمه‌متراکم، اراضی کشاورزی، مراتع کم‌تراکم و اراضی بایر به ترتیب 5446، 4516، 3710 ، 3065 و 2019 دلار تعیین شد. بنابراین می‌توان نتیجه‌گیری نمود که اجرای سیاست‌های مناسب برای جلوگیری و یا به حداقل رساندن تبدیل کاربری‌های زمینی با ظرفیت ذخیره‌سازی کربن بالاتر به کاربری‌هایی که ظرفیت ذخیره‌سازی کربن کمتری دارند، از اهمیت ویژه‌ای برخوردار است.

کلیدواژه‌ها

عنوان مقاله [English]

Comparison of carbon storage in soil and plant biomass of different land uses/land covers of Sefiddasht watershed in Chaharmahal va Bakhtiari province

نویسندگان [English]

  • Mohsen Amani 1
  • Ali Asghar Naghipour 1
  • Ataollah Ebrahimi 1
  • Zahra Heidari 1
  • Mohammadreza Ashrafzadeh 2

1 Department of Nature Engineering, Faculty of Natural Resources and Earth Science,, Shahrekord University, Shahrekord, Iran.

2 Department of Environmental Engineering, Faculty of Natural Resources and Earth Science, Shahrekord University, Shahrekord, Iran.

چکیده [English]

Carbon storage in terrestrial ecosystems is an important part of global carbon storage and plays a vital role in mitigating climate change. The purpose of this research is to investigate the effects of different types of land uses/land covers (dense rangelands, semi-dense rangelands, low density rangelands, barren lands and agricultural lands) on the amount of soil carbon and plant biomass sequestration as an important ecosystem service in Sefiddasht watershed in in Chaharmahal va Bakhtiari province. Sampling of soil and vegetation was done randomly and systematically. For this purpose, 60 plots of 4 square meters were used for collecting soil, plant material and litter. Plant biomass was sampled by direct measurement method. Soil samples were also collected from the depth of 0-30 cm and 20 samples in each area. The results showed that there is a significant difference between the investigated regions in terms of total carbon storage. The total carbon storage from the highest to the lowest in order includes dense rangelands (46.42 tons/ha), semi-dense rangelands (38.49 tons/ha), agricultural lands (31.62 tons/ha), low-density rangelands (26.12 tons) per hectare) and barren lands (17.21 tons per hectare). The economic value of the total carbon storage per hectare of the examined uses, including dense rangelands, semi-dense rangelands, agricultural lands, low-dense rangelands, and barren lands, was determined to be $5446, $4516, $3710, $3065, and $2019, respectively. Therefore, it can be concluded that the implementation of appropriate policies to prevent or minimize the conversion of land uses with a higher carbon storage capacity to land uses with a lower carbon storage capacity is of particular importance.

کلیدواژه‌ها [English]

  • Rangelands
  • land cover
  • carbon sequestration
  • climate change
  • carbon distribution
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