تأثیر جنگل‌کاری با گونه‌های سوزنی‌برگ بر ترسیب‌کربن اتمسفری (پژوهش موردی: جنگل‌کاری‌های کارخانه ذوب‌آهن اصفهان)

نوع مقاله : علمی- پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد جنگلداری، دانشگاه یزد

2 استادیار، دانشگاه یزد

3 پژوهشگر، بخش تحقیقات پایه، ایمنی، بهداشت و محیط‌زیست کارخانه ذوب‌آهن اصفهان

چکیده

به‌منظور ارزیابی توان ترسیب کربن گونه‌های سوزنی برگ سرو نقره‌ای (Cupressusarizonica)و کاج  تهران (Pinuseldarica) در جنگل‌کاری‌های ذوب‌آهن اصفهان که در سنین 17 تا 18 سالگی بودند، پس از مشخص کردن قطعات کشت‌شده با این‌گونه‌ها، تعدادی از آنها به‌صورت کاملاً تصادفی انتخاب شدند. سپس از هر گونه تعداد پنج پایه‌ از طبقات قطری مختلف (پنج طبقه) انتخاب و قطع شد. همچنین نمونه‌های خاک از دو عمق صفر تا 30 و 30 تا 60 سانتی‌متری در هر یک از قطعات کشت‌شده تهیه شد. پس از انتقال اندام‌های مختلف گیاهی به آزمایشگاه، ضریب تبدیل ترسیب کربن اندام‌های گیاهی به‌صورت جداگانه با روش احتراق تعیین شد. درنهایت میزان ترسیب کربن کل برای گونه‌های مختلف و اندوخته کربن اندام‌ها و عمق‌های مختلف خاک مورد مقایسه قرار گرفت. نتایج نشان داد که میزان ترسیب کربن در دو گونه مورد بررسی، اختلاف معنی‌داری در سطح اطمینان 99 درصد دارد و سرو نقره‌ای توان ترسیب کربن بیشتری را نسبت به کاج تهران به‌خود اختصاص داده است. همچنین ترسیب کربن در بین اندام‌های مختلف (برگ، اندام چوبی، ریشه) تفاوت معنی‌داری در سطح 99 درصد نشان داد، به‌طوری‌که اندام چوبی بیشترین مقدار ترسیب کربن در هکتار را داشت. کربن ذخیره‌ شده در خاک دو منطقه کشت‌شده با این گونه‌ها اختلاف معنی‌داری با یکدیگر نداشت.

کلیدواژه‌ها

عنوان مقاله [English]

Effects of plantation with conifers on Carbon sequestration (Case study: Zob-e-Ahan company, Isfahan)

نویسندگان [English]

  • Hojjat Narimani 1
  • Mohammad Hossein Iran Nezhad Parizi 2
  • Bahman Kiani 2
  • Rasoul Ghorbali 3
1 M.Sc. Student Forestry, Faculty of Natural Resources and Desert Science, Yazd University, Yazd, Iran
2 Assistant Prof., Faculty of Natural Resources and Desert Science, Yazd University, Yazd, Iran
3 Research Expert, Division of Main, Safety, Hygiene and Environment, Esfahan Steel Company, Isfahan, Iran
چکیده [English]

The potential for carbon sequestration was evaluated for two coniferous species (Cupressus arizonica Green var. arizonica and Pinus eldarica Medw) in 17-18 year old plantations of Zob-e-Ahan industrial company near Isfahan. Transect sampling was conducted in each section, and five trees in each of the available 5 diameter classes were randomly selected and cut. Moreover, soil samples from 0 to 30 and 30 to 60 cm depth were collected in each part. Shoots and roots of the trees were separately collected and weighted. In addition, carbon sequestration of organs and soil was determined with an in-situ combustion method. Results showed that the rate of carbon sequestration was significantly different between two species (p<0.01), for which C. arizonica showed higher rate than P. eldarica. In addition, carbon sequestration showed significant difference (p<0.01) amongst the tree parts (roots, woody organs and leaves), where woody parts exhibited the highest carbon sequestration. Investigation of soil carbon storage showed no significant difference between soils in which two plantations were established.

کلیدواژه‌ها [English]

  • Carbon sequestration
  • plantation
  • conifer
  • Zob-e-Ahan company of Isfahan

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