نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار پژوهشکده محیط زیست جهاد دانشگاهی

2 دانشیار دانشکده کشاورزی و منابع طبیعی اهر، دانشگاه تبریز

3 استادیار پژوهشکده محیط زیست جهاد دانشگاهی، رشت، ایران

چکیده

جذب و ذخیره کربن فرآیندی حیاتی در مبارزه جهانی با تغییر اقلیم است. با جذب و ذخیره دی‌اکسیدکربن انتشاریافته در جو، از تشدید اثر گلخانه‌ای جلوگیری به عمل می‌آید، به این عمل ترسیب کربن گفته می‌شود. جنگل‌ها کم هزینه‌ترین روش از لحاظ اقتصادی برای کاهش اثرات گلخانه‌ای و سیاست‌های اقلیمی مربوط به تعادل کربن شناخته شده‌اند. در این تحقیق مدل‌سازی و برآورد موجودی و ذخیره کربن خاک در جنگلکاری‌های صنوبر (Populus deltoides) در استان گیلان بر اساس محاسبات مستقیم از طریق آنالیز تنه و تعیین بیوماس گیاهی مورد بررسی قرار گرفت. ترسیب کربن در مقابل متغیر مستقل سن با استفاده از تحلیل رگرسیون غیرخطی مدل‌سازی شد. به این منظور چهار منطقه جنگلکاری صنوبر در استان گیلان انتخاب شدند. در هر قطعه نمونه دو اصله درخت صنوبر به‌صورت تصادفی انتخاب و برای آنالیز تنه، قطع شدند. در هر یک از قطعات نمونه یک پروفیل خاک حفر شد. نمونه‌های خاک از اعماق 20-0، 40-20، 60-40 و 80-60 سانتیمتری خاک جهت انجام آزمایشهای فیزیکی و شیمیایی برداشت شدند.نتایج نشان داد که ترسیب کربن موجود در تنه درختان صنوبر در مناطق مورد مطالعه بین 16/24 تا 52 تن در هکتار در سال بود و مقدار ترسیب کربن در خاک نیز 8/19 تا 88/54 تن در هکتار بود که مقدار ترسیب کربن در عمق‌های سطحی خاک بیشترین بود. مقایسه ترسیب کربن در رویشگاه‌های مختلف می‌تواند به احیای زمینهای تخریب شده و تبدیل آنها به جنگل‌کاریهای پربازده و گام مؤثری در مدیریت ترسیب کربن با استفاده از جنگل‌کاری با گونه‌های سریع‌الرشد خواهد بود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Investigation of Above-ground and soil carbon sequestration in poplar plantations in Guilan province

نویسندگان [English]

  • Tooba Abedi 1
  • Roya Abedi 2
  • Hadi Modaberi 3

1 Assistant Professor, Environmental Research Institute, Academic Center for Education, Culture and Research

2 Associate Professor, Ahar Faculty of Agriculture and Natural Resources, Tabriz University

3 Assistant Professor, Jihad University Environmental Research Institute, Rasht, Iran

چکیده [English]

Forests are regarded as an economically viable solution to reduce greenhouse gas emissions and mitigate climate change. Carbon sequestration in forests is accomplished through surface and underground biomass as well as soil, which are interconnected and important sources of carbon storage. using direct calculations based on stem analysis and plant biomass. Four poplar plantations were selected, and a one-hectare plot was sampled in each plantation. DBH and the total height of all trees were measured in each plot, and two poplar trees were randomly selected and cut for analysis. Stem analysis, wood biomass determination, and carbon measurement were conducted. In each plot, soil profiles were dug, and samples were taken to measure the physicochemical properties. The results showed that Shaft had the highest density (N/ha) (326), followed by Siahkal (216), Langrud (129), and Talesh (190), respectively. Stand tree stem carbon content (tons per hectare) was the highest in Talesh with 52 tons per hectare, followed by Shaft (38.7), Siahkal (28.3), and Langrood (24.16). Allometric equations were established based on the highest correlation coefficient (r2) and the lowest standard error value (SE) between age as the independent variable and carbon as the dependent variable. Calculation of carbon sequestration in plantation stand stock and soil can provide insights into species function and their responses. Furthermore, comparing carbon sequestration in different sites can aid in the restoration of degraded lands and the conversion of such lands into high-yield plantations, which can be an effective measure in managing carbon sequestration using fast-growing species.

کلیدواژه‌ها [English]

  • Carbon Sequestration
  • Climate Change
  • Modeling
  • Stem Analysis
 
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