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Soil Carbon Dynamics Inferred from Carbon Isotope Compositions of Soil Organic Matter and Soil Respiration

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小嵐 淳   ; 飯田 孝夫*; 森泉 純*; 浅野 智宏

Koarashi, Jun; Iida, Takao*; Moriizumi, Jun*; Asano, Tomohiro

陸域生態系において、主要な炭素リザーバーである土壌有機物の生成・貯蔵・分解は,炭素循環およびC-14の環境動態を支配する重要な過程である。本研究では、土壌有機物および土壌呼吸CO$$_{2}$$の炭素同位体組成を評価する手法を提供する。土壌有機物および土壌呼吸CO$$_{2}$$の炭素同位体組成に基づいて、土壌炭素サイクルメカニズムを解析した。

Soil organic matter (SOM) is a significant carbon reservoir in terrestrial ecosystems. Therefore, knowledge of SOM dynamics is essential for better understanding not only the global carbon cycle but also the environmental behabior of additional 14C produced by the nuclear power industry. In this study, carbon isotope compositions were determiend for chemically fractionated SOM and soil respiration in an urban forest, to investigate the formation, storage and decomposition of SOM.

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