Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10846072 | Soil Biology and Biochemistry | 2011 | 11 Pages |
Abstract
⺠Antecedent soil moisture conditions affected denitrification. The N2+N2O fluxes and the N2/N2O ratios were higher in soils which were preincubated under dry conditions when compared to soils preincubated under wet conditions. ⺠The observed time patterns of N2O and N2 suggested a nonhomogeneous distribution of nitrate and denitrifier activity in the incubated soil. ⺠The time courses of δ15N-N2O, δ18O-N2O and Site Preference (SP) varied in line with the observed N2O and N2 emissions supporting the existence of multipools of nitrate. ⺠Isotopic fractionation modelling of the δ15N of emitted N2O, during the time series confirmed it being derived from multipools of nitrate. ⺠Manipulating the timing of fertiliser application according to antecedent moisture conditions could be a potential mitigation measure for soil N2O emissions.
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Authors
Anja Bergstermann, Laura Cárdenas, Roland Bol, Lucy Gilliam, Keith Goulding, Ana Meijide, David Scholefield, Antonio Vallejo, Reinhard Well,