Biorecycle-its structure and variation

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The present study intended to clarify the bio-recycle process in termite-symbiont system, ruminant-symbiont system and soil communities with special reference to cellulose decomposition process and C/N balance problem.1. Cellulose decomposition : Lower termites produce cellulases in salivary glands and midgut, and decompose cellulose into glucose in the midgut, and at the same times symbiotic protoza decompose cellulose in the hindgut. On the other hand, higher termites without symbiotic protozoa produce cellulase from salivary glands and midgut. In ruminants, fungi are also concerened in the cellulose decomposition as well as protozoa and bacteria.2. C/N balance : Lower termites which eat wood poor in nitrogen get nitrogen from the air with the aid of symbiotic bacteria : at least 30-50% of nitrogen of those termite bodies were due to the air, although the dependency on atomospheric nitogen is low in higher termites which mainly consume other dead plant material than wood.3. Importance of fungi in the decomposition process in soil ecosystem was examined in relation to C/N balance problem.