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Contrasting effects of wood ash application on microbial community structure, biomass and processes in drained forested peatlands
Örebro universitet, Akademin för naturvetenskap och teknik. Dept Plant & Environm Sci, Univ Gothenburg, Gothenburg, Sweden.
Dept Plant & Environm Sci, Univ Gothenburg, Gothenburg, Sweden.
Forestry Res Inst Sweden Skogforsk, Uppsala, Sweden.
Dept Forest Ecol & Management, Swedish Univ Agr Sci SLU, Umeå, Sweden.
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2010 (engelsk)Inngår i: FEMS Microbiology Ecology, ISSN 0168-6496, E-ISSN 1574-6941, Vol. 73, nr 3, s. 550-562Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The effects of wood ash application on soil microbial processes were investigated in three drained forested peatlands, which differed in nutrient status and time since application. Measured variables included the concentrations of soil elements and phospholipid fatty acids (PLFAs), net nitrogen (N) mineralization, nitrification and denitrification enzyme activity, potential methane (CH(4)) oxidation, CH(4) production and microbial respiration kinetics. Wood ash application had a considerable influence on soil element concentrations. This mirrored a decrease in the majority of the microbial biomarkers by more than one-third in the two oligotrophic peatlands, although the microbial community composition was not altered. The decreases in PLFAs coincided with reduced net ammonification and net N mineralization. Other measured variables did not change systematically as a result of wood ash application. No significant changes in microbial biomass or processes were found in the mesotrophic peatland, possibly because too little time (1 year) had elapsed since the wood ash application. This study suggests that oligotrophic peatlands can be substantially affected by wood ash for a period of at least 4 years after application. However, within 25 years of the wood ash application, the microbial biomass seemed to have recovered or adapted to enhanced element concentrations in the soil.

sted, utgiver, år, opplag, sider
2010. Vol. 73, nr 3, s. 550-562
HSV kategori
Forskningsprogram
Mikrobiologi
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URN: urn:nbn:se:oru:diva-18910DOI: 10.1111/j.1574-6941.2010.00911.xISI: 000280633000012OAI: oai:DiVA.org:oru-18910DiVA, id: diva2:445543
Tilgjengelig fra: 2011-10-04 Laget: 2011-09-30 Sist oppdatert: 2018-04-24bibliografisk kontrollert

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