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- Clarholm, M., et al.
(author)
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Biological aspects of nitrogen mineralization in humus from a pine forest podsol incubated under different moisture and temperature conditions
- 1981
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In: Oikos. - 1600-0706. ; 37:2, s. 137-145
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Journal article (peer-reviewed)abstract
- Abstract in UndeterminedFluctuations of soil organism abundance, soil respiration and inorganic nitrogen werestudied in a laboratory experiment on material taken from the humus layer of a Scotspine forest and incubated under different moisture and temperature regimes. Theexperiment was run for 28 wk with samplings every 7 wk. At 28 wk, increases in"total movable N" (inorganic N + biomass N) were observed in samples incubated athigh temperature and/or high moisture content. Most of the N was found in biomassexcept in incubations at the highest temperatures and moistures. Under those conditions,high abundance of nematodes occurred together with drastically increasedamounts of inorganic N. Low values of inorganic N were recorded under conditionscommon in the field. No obvious relations could be detected between standing cropsof bacteria and temperature, moisture or respiration. The number of bacterial-feedingnematodes seemed to be a possible measure of previous bacterial productioncontributing more information than the standing crop measurements of the bacteria,which varied little despite the direct evidence of substantial bacterial production insome incubation conditions.
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