بررسی پتانسیل ذخیره کربن گونة گتگ Halocnemum strobilaceum در مراتع ساحلی جنوب استان بوشهر

نوع مقاله: مقاله پژوهشی

نویسنده

دانشیار، دانشکده مهندسی، دانشگاه آزاد اسلامی، واحد بوشهر، ایران

چکیده

هدف از این مطالعه، برآورد میزان ذخیره کربن و تأثیر پارامترهای محیطی بر ذخیره کربن گونه گتک در مراتع ساحلی منطقه بردخون- استان بوشهر است. به منظور انجام تحقیق، از بخش هوایی و زیرزمینی، خاک پای بوته و فاصله 5/1 متری در دو عمق (30-0 و 50-30 سانتی‌متر) در 5 سایت در محل پراکنش گونه و منطقه شاهد نمونه برداشت گردید. نمونه‌های گیاهی (برگ، شاخه و ریشه) و پارامترهای خاک (درصد شن، رس و سیلت، هدایت الکتریکی، اسیدیته، درصد اشباع، آهک فعال، وزن مخصوص، ماده آلی و ازت) در هر نقطه نمونه‌برداری با روش‌های آزمایشگاهی تعیین گردید. کربن آلی اندام‌های گیاهی به روش احتراق و کربن آلی خاک به روش والکی- بلک تعیین شد. روابط بین پارامترهای خاک و مقدار کربن ذخیره شده در بایومس هوایی و زیرزمینی با روش آنالیز مولفه‌های اصلی و آنالیز خوشه‌ای تعیین گردید. نتایج نشان داد که میانگین میزان ذخیره کربن در زیتوده هوایی 248 گرم در مترمربع و در زیتودة زیرزمینی 62/18 گرم در مترمربع می‌باشد. همچنین میزان کربن ذخیره شده در زیر بوته تفاوت معنی­داری با کربن ذخیره شده در فاصله 5/1 متری دارد. نتایج تجزیه واریانس پارامترهای خاک و ذخیره کربن خاک با منطقه شاهد نشان داد که برای سایر پارامترها، اختلاف در سطح 5 درصد معنی‌دار است. میانگین میزان ذخیره کربن خاک 75/4152 گرم در مترمربع است. میزان کربن ذخیره شده در عمق دوم خاک بیشتر از عمق اول بود، که دلیل آن گسترش عمق نفوذ ریشه و سطح گسترش ریشه است. کل کربن ذخیره شده در زیتوده رویشگاه گونه 3728 تن در 20 هکتار از سطح پراکنش این گونه و 153800 تن در هکتار در سطح منطقه می‌باشد، که نشان می‌دهد خاک رویشگاه نقش مهم‌تری در ذخیره کربن دارد. از پارامترهای خاک مؤثر بر ذخیره کربن هدایت الکتریکی، اسیدیته، درصد شن، درصد رس و وزن مخصوص ظاهری است.
 

کلیدواژه‌ها


عنوان مقاله [English]

Carbon storage potential of Halocnemum strobilaceum in coastal rangelands of Boushehr province

نویسنده [English]

  • fazel amiri
چکیده [English]

This study was conducted to calculate the amounts of carbon storage and effects of environmental factors on C storage of Halocnemum strobilaceum in the coastal rangelands in Bordekhoon of Boushehr province. The plant samples were cut (above and underground), and soil samples were taken at two depths (0-30, 30-50 cm) in five sampling and control sites. The plant samples (leaves, branches, and roots) and soil factors (percentage of sand, clay and silt, EC, pH, SP, T.N.V, Bd, OC, and N) in each sample point were determined by laboratory methods. Organic carbon in plant parts and soil were determined using burning and Walky-black methods. The relations between soil parameters and C storage in above and below ground biomass were determined using principal component analysis and cluster analysis. The result showed that the amount of C storage in above-and below-ground biomass was 248 and 18.62 gr/m2, respectively. Furthermore, the amount of C stored beneath the plant had a significant difference with stored carbon at a distance of 1.5 m. The result of variance analysis of soil parameters and soil carbon storage with a central site for other parameters showed a significant difference at the 5% level. The average soil carbon storage was 4152.75gr/m2. The amount of carbon stored in second soil depth was more than the first depth, due to the root penetration and root development. Total carbon storage in the plant biomass of the study habitat was 3728 tons in 20 ha of species distribution and 153800 t/ha at the regional level, showing the important role of soil in carbon storage. The results of the effect of soil parameters on carbon storage by PCA and cluster analysis showed that, the most important parameters influencing soil carbon storage were EC, pH, percentage of sand and silt and bulk density.

کلیدواژه‌ها [English]

  • Carbon storage
  • Halocnemum strobilaceum
  • Costal rangelands
  • Bordekhoon- Boushehr
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