アカマツ林における落葉の分解と土壌堆積腐植層の形成過程

Abstract

アカマツ林におけるリター量の推定と針葉のリターバッグ法による分解の実験の結果から土壌堆積腐植層を形成する有機物の分解時間を推定した。さらに一時間断面における堆積腐植層の微細形態観察の結果からマツ林の堆積腐植層における有機物の分解過程と土壌堆腐植層の形成過程を調査した。アカマツ林における土壌堆積腐植層における有機物の分解や物質循環の様式についての考察を行った。

Decomposition processes and genesis of soil organic layer were studied in a pine forest in Kyoto, Japan. The soil organic layer showed a moder type which is characterized by the development of the H layer consisting of the faunal faces. The decomposition processes were studied by the litter bag and the micromorphological observation methods. The development of the soil organic layer was not simply due to the slow decomposition of substrates, but the accumulation of decomposed materials on and in the decomposing needles and the H layer. The decomposition processes in the soil organic layer were shown in the attached photographs.