Nitrous oxide productivity of soil fungi along a gradient of cattle impact

0446949 - BC 2016 RIV GB eng J - Journal Article
Jirout, Jiří
Nitrous oxide productivity of soil fungi along a gradient of cattle impact.
Fungal Ecology. Roč. 17, October (2015), s. 155-163. ISSN 1754-5048. E-ISSN 1878-0083
R&D Projects: GA ČR GPP504/12/P752
Institutional support: RVO:60077344
Keywords : soil * fungi * nitrous oxide * selective inhibition * cattle overwintering * oxygen availability
Subject RIV: EE - Microbiology, Virology
Impact factor: 2.631, year: 2015

The objective of the study was to identify N₂O-producing fungi isolated from six qualitatively different sections of an overwintering pasture with substantial cattle impact. 80 out of 164 fungal isolates were considered as N₂O-producers in nitrite-containing medium, representing 33 fungal species of 23 different genera. Ability to produce N₂O was newly reported in eight genera: Arthrinium, Gibellulopsis, Ilyonectria, Lichtheimia, Paraphaeosphaeria, Purpureocillium, Tolypocladium, Westerdykella. Three levels of fungal N₂O-productivity were assigned according to the fraction of nitrite-N transformed into N₂O–N: < 1%, 1–10%, over 10%. Fungi capable of high and moderate transformation rates were predominantly isolated from sections under current or past cattle impact, where they contributed with a maximum of 65% of the total N₂O emissions. There was no significant effect of cultivation conditions on the fraction of N₂O-producing fungi. The results demonstrate that N₂O-producing fungi are a common constituent of fungal communities in soils impacted by overwintering cattle.
Permanent Link: http://hdl.handle.net/11104/0249895