Emissions of CH.sub.4./sub., CO.sub.2./sub., and N.sub.2./sub.O from soil at a cattle overwintering area as affected by available C and N

0429065 - BC 2015 RIV NL eng J - Journal Article
Šimek, Miloslav - Hynšt, Jaroslav - Šimek, P.
Emissions of CH₄, CO₂, and N₂O from soil at a cattle overwintering area as affected by available C and N.
Applied Soil Ecology. Roč. 75, March (2014), s. 52-62. ISSN 0929-1393. E-ISSN 1873-0272
R&D Projects: GA ČR GA526/09/1570; GA MŠMT LC06066
Institutional research plan: CEZ:AV0Z60660521
Institutional support: RVO:60077344
Keywords : methane * nitrous oxide * carbon dioxide * gas * emissions * cattle
Subject RIV: EE - Microbiology, Virology
Impact factor: 2.644, year: 2014

Relationships between CH₄, CO₂, and N₂O emissions were studied in soil that had been freshly amended with large deposits of cattle wastes. Dynamics of CH₄, CO₂, and N₂O emissions were investigated with flux chambers from early April to late June 2011, during the 3 months following cattle overwintering at the site. This 81-day field study was supplemented with soil analyses of available C and N content and measurement of denitrification activity. In a more detailed field investigation, the daily time course of emissions was determined. The field research was complemented with a laboratory experiment that focused on the short-term time course of N₂O and CH₄ production in artificially created anoxic soil microsites. The following hypotheses were tested: (i) a large input of C (and N and other nutrients) in cattle manure creates conditions suitable for methanogenesis, and therefore overwintering areas can produce large amounts of CH₄; (ii) N₂O is produced and emitted until the level of mineral N decreases, while the level of CH₄ production is low; and (iii) production of CH₄ is greater when N immobilization decreases the level of NO₃^- in soil. N₂O emissions were relatively large during the first 3 weeks, then peaked (at ca. 4000 µg N₂O-N m^-2 h^-1) and soon decreased to almost zero; the changes were related to the mineral and soluble organic N content in soil. CH₄ fluxes were large, though variable, in the first 2 months (600-3000 µg CH₄-C m^-2 h^-1) and were independent of C and N availability. Although time courses differed for CH₄ and N₂O, a negative relationship between N₂O and CH₄ emissions was not detected.
Permanent Link: http://hdl.handle.net/11104/0236136