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Impact of land use management on soil CO2 greenhouse gas emissions (Case studyFandoghloo Forest Reserve) | ||
| تحقیقات مرتع و بیابان ایران | ||
| Article 13, Volume 23, Issue 2, September 2016, Pages 343-330 PDF (428.29 K) | ||
| Document Type: Research Paper | ||
| DOI: 10.22092/ijrdr.2016.107035 | ||
| Authors | ||
| Shole Haj agha Memar; Farshad Keivan Behjou* ; Kiomars sefidi; Behzad Behtari | ||
| Abstract | ||
| The aim of this study was to investigate the impact of ecosystem change on emissions and carbon mineralization rate in Fandoghloo region. Soil sampling was performed at three depths (0-30 cm) from the grazing rangeland ecosystem, degraded rangeland ecosystem, and agricultural, ecosystem. Carbon dioxide emissions were measured during incubation with alkali absorption method. The highest and lowest emissions of carbon dioxide and carbon mineralization rate were obtained in the grazing rangeland ecosystem (0.968 mg CO2 g-1 soil and 0.00314 mol C kg-1 soil d-1), and the degraded rangeland ecosystem (4693 mg CO2 g-1 soil, and 0.0015mol C kg-1 soil d-1), respectively, showing a significant difference with other ecosystems at different depth levels. According to the results, significant differences were found for the activity of microorganisms in decomposition of organic matter in the study ecosystems. The dynamics of vegetation and returned fine roots caused high emissions of CO2 in soil of grazing rangeland ecosystem. In the agricultural ecosystem, due to the relatively wet conditions and failure to return organic matter to the soil, the decomposition of inaccessible organic matter caused to decreased soil organic matter and low carbon dioxide emissions. | ||
| Keywords | ||
| Microorganism; Organic Matter; Carbon mineralization; Incubation; alkali absorption | ||
| References | ||
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