The Energy Flow and Mineral Cycles in a Zoysia japonica and Miscanthus sinensis Ecosystem on Mt. Kwanak 2. Organic Matter Synthesis and Decomposition Balance

관악산의 잔디와 억새 생태계에 있어서 에너지의 흐름과 무기물의 순환 2. 유기물 합성과 분해의 평형

An investigation was performed to reveal the relation of the production and decomposition of the Zoysia japoni ica and Miscanthus sinensis litters on Mt.Kwanak. The decay constant k of litters was as follows; k of Zoysia japonica, k=0.44, k of Miscanthus sicensis, k=0.33 The time required for the decomposition of half of the accumulated organic matter of Zoysia japonice and Miscanthus sinensis was 1.6 and 2.1 years, respectively. The amount of mineral nutrients returned annually to soil is faster in the ZQvsia japonica grassland than in the Miscanthus sinensis grassland on Mt. Kwanak. Key words: Organic rnatter synthesis, Decomposition balance.