METLA

Priha, Outi. 1999.

Microbial activities in soils under Scots pine, Norway spruce and silver birch

Academic dissertation.
Metsäntutkimuslaitoksen tiedonantoja - Finnish Forest Research Institute, Research Papers 731. - 50 p. + Papers I - VI.
[951-40-1678-5]
[Price 75 FIM - 12,60 EUR]

Julkaisun yhteenveto - Publication summary

Text and tables as pdf -files. If needed download Adobe Acrobat -reader

METSÄNTUTKIMUSLAITOKSEN TIEDONANTOJA 731, 1999
FINNISH FOREST RESEARCH INSTITUTE, RESEARCH PAPERS 731, 1999

Microbial activities in soils under Scots pine, Norway spruce and silver birch


Outi Priha

Finnish Forest Research Institute


Vantaa Research Centre

Academic dissertation in Environmental Microbiology
Faculty of Agriculture and Forestry
University of Helsinki

To be presented, with the permission of the Faculty of Agriculture and Forestry of the University of Helsinki, for public criticism in Auditorium 2041 at Viikki Biocenter (Viikinkaari 5, Helsinki) on May 21st, 1999, at 12 o'clock noon.

Helsinki, 1999


"Microbial activities in soils under Scots pine, Norway spruce and silver birch"
- 50 p. + Papers I -VI. [ISBN 951-40-1678-5]

Tables

Table 1. Soil pH, concentrations of total organic C and total N, and C:N ratios of the soils of the field sites. OMT = Oxalis acetocella - Vaccinium myrtillus -type and VT = Vaccinium vitis-idaea -type (Cajander 1949).

Table 2. Proportions of microbial biomass C and N of soil organic C and total N, and microbial biomass C:N ratio of the soils at different experiments. FE = fumigation-extraction. For explanation of forest site types, see Table 1.

Table 3. Different pools of N in the pot experiments. For explanation of calculating Nmic (microbial biomass N), see Table 2.

Table 4. A generalized overall picture of the effects of tree species on soil microbes and their activities. The symbols can only be compared within one experiment. Cmic (microbial biomass C), C mineralization and Nmic (microbial biomass N): +++ > ++ > +. Net formation of mineral N and net nitrification: + = mineralization, 0 = no net effect, - = immobilization into microbes. PLFAs (phospholipid fatty acids) and CLPPs (community level physiological profiles; Biolog): different symbols indicate varying patterns. * = results could not be simplified into this form. P = pine, S = spruce and B = birch. For explanation of forest site types, see Table 1.


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