Fragmentation process of leaf litter in Mull-type organic soil
1998
Osono, T. (Kyoto Univ. (Japan)) | Takeda, H.
Fragmentation process of leaf litter in Mull-type organic soil was seasonally investigated. The investigation was made from June to November 1996 at Fagus-Quercus dominated cool temperate forest in Ashiu Experimental Forest, Kyoto University. Weight loss of leaf litter was observed and was mainly due to fragmentation loss while catabolism of soil organisms was of less importance. Seasonal changes in carbon and nutrients concentrations (N, P, Na, K, Mg, Ca) were shown in Fagus leaf litter. Immobilization (Jun to Aug) and mineralization (Sept to Nov) of nitrogen were observed while the C/N ratio was decreased to 22-26. The results suggested that fragmentation process was an important factor of leaf litter decomposition in Mull-type organic soil, and that organic soil, as a source of organic materials to mineral soil, was contributing to nutrient cycle in the forest ecosystem through the processing of leaf litter such as immobilization of nutrients and fragmentation
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