| Autor: |
Flemming Ekelund, J. Damgaard, U. Friberg-Jensen, Lars Vesterdal, B. Andersen, H. Kill, K. Thingsgaard, Regin Rønn, C. Thirup, B. Larsen, C. Riis, Lars Stoumann Jensen, Soren Christensen, Jørgen Bo Larsen, Andreas Tom-Petersen |
| Předmět: |
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| Zdroj: |
University of Copenhagen |
| Popis: |
Carbon, nitrogen or phosphorus limitation of microbial growth in a forest and a field soil was evaluated from measurements of respiration and protozoan counts after nutrient addition. In both soils simultaneous addition of C (glucose) and N (NH 4 NO 3 ) resulted in microbial growth as indicated by a gradual increase in respiration rate whereas a single addition of C did not induce microbial growth. Addition of P (KH 2 PO 4 + Na 2 HPO 4 ) to C-amended soil stimulated activity slightly in forest soil but not in field soil whereas addition of P to soil amended with C and N increased growth markedly in both soils. The stimulation of microbial growth indicated by respiration profiles following C and N addition was supported by enumeration of bacterivorous protozoa. The numbers of soil protozoa increased above the control only when C and N were added simultaneously. These observations lend support to the proposal that respiration patterns may be valuable in an analysis of nutrient limitation of microbial growth in soils. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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