The contribution of ericoid plants to soil nitrogen chemistry and organic matter decomposition in boreal forest soil

Bartosz Adamczyk, Anu Ahvenainen, Outi-Maaria Sietiö, Sanna Kanerva, Antti-Jussi Kieloaho, Aino Smolander, Veikko Kitunen, Pekka Saranpää, Tapio Laakso, Petra Strakova, Jussi Heinonsalo

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Sammanfattning

Nitrogen (N) availability restricts plant carbon assimilation from the atmosphere in N-limited boreal ecosystems. Boreal forest floor is covered with ericoid plants and in soil, ectomycorrhizal and ericoid mycorrhizal plant roots and fungal hyphae are intermixed. How different mycorrhizal plants affect N mobilization from soil organic matter (SOM) has yet to be elucidated. Here we compared the effects of ericoid plants (Calluna vulgaris, Vaccinium myrtillus, Vaccinium vitis-idaea), forming ericoid mycorrhiza (ERM), on soil N chemistry, plant N uptake and SOM decomposition and compared them with ectomycorrhizal (ECM) Pinus sylvestris in a microcosm experiment. Pine and ericoid plants affected soil N similarly, accessing both degradable and recalcitrant N pools. Both ericoid plants and pine took up N from organic source. Ericoid plant roots contained more phenolic compounds and condensed tannins than pine roots which together with lower pH under ericoids suggests substantial changes in soil chemistry and biology. This study underlines the plant stimulation of SOM degradation with special emphasis on ericoid plants. We point out that both ericoid and ectomycorrhizal plants and their interactions should be of interest when N uptake and SOM decomposition in boreal forests are studied. (C) 2016 Elsevier Ltd. All rights reserved.
Originalspråkengelska
TidskriftSoil Biology & Biochemistry
Volym103
Sidor (från-till)394-404
Antal sidor11
ISSN0038-0717
DOI
StatusPublicerad - sep 2016
MoE-publikationstypA1 Tidskriftsartikel-refererad

Bibliografisk information

Corrigendum to “The contribution of ericoid plants to soil nitrogen chemistry and organic matter decomposition in boreal forest soil” [Soil Biol. Biochem. 103 (2016) 394–404]
in Soil Biology and Biochemistry Volume 112, September 2017, Pages 281-282
DOI: 10.1016/j.soilbio.2017.05.009

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