The influence of earthworms (Lumbricidae) on the nitrogen dynamics in the soil litter system of a deciduous forest

摘要: The influence of earthworms (Aporrectodea caliginosa (Savigny) and Lumbricus castaneus (Savigny)) on the rate nitrogen net mineralization soil was studied in laboratory field. additional cause by burrowing activity substrat feeding earthworm A. (N L )was directly correlated to biomass lumbricids independently their number. A rise temperature caused an exponential increase N values. Q 10 value this process (2.18) found be much higher than that without (Q 10=1.22). At 15°C calculated about 250 μg g-1 fresh body wt d-1. Using experimentally determined relationship between values, a population beechwood limestone 4.23 kg ha-1 a-1.In contrast litter dwelling species L. lost considerable amounts (56%) during 4 week incubation period. Only 1/3 equivalent weight loss animals recovered mineral pool.The addition (old beech leaf litter, freshly fallen ash litter) had pronounced effect both values soil. Presence old leaves wheres other types effected decrease mineralization. Fragmented have most distinct (-69%) (-74%).