biostudies-literatureUnknown9Duan YFInternationalt Center for Forskning i Ăkologisk Jordbrug og FødevaresystemerAgricultural soils are a significant source of anthropogenic nitrous oxide (N<sub>2</sub>O) emissions, because of fertilizer application and decomposition of crop residues. We studied interactions between nitrogen (N) amendments and soil conditions in a 2-year field experiment with or without catch crop incorporation before seeding of spring barley, and with or without application of N in the form of digested liquid manure or mineral N fertilizer. Weather conditions, soil inorganic N dynamics, and N<sub>2</sub>O emissions were monitored during spring, and soil samples were analyzed for abundances of nitrite reduction (<i>nirK</i> and <i>nirS</i>) and N<sub>2</sub>O reduction genes (<i>nosZ</i> clade I and II), and structure of nitrite- and N<sub>2</sub>O-reducing communities. FertilizationFrontiers in microbiology2629https://www.ebi.ac.uk/biostudies/studies/S-EPMC6225543biostudies-literatureCatch Crop Residues Stimulate N<sub>2</sub>O Emissions During Spring, Without Affecting the Genetic Potential for Nitrite and N<sub>2</sub>O Reduction.PMC6225543Jones CMPetersen SOPrieme ALabouriau RDuan YFHallin SfalseCatch Crop Residues Stimulate N<sub>2</sub>O Emissions During Spring, Without Affecting the Genetic Potential for Nitrite and N<sub>2</sub>O Reduction.Agricultural soils are a significant source of anthropogenic nitrous oxide (N<sub>2</sub>O) emissions, because of fertilizer application and decomposition of crop residues. We studied interactions between nitrogen (N) amendments and soil conditions in a 2-year field experiment with or without catch crop incorporation before seeding of spring barley, and with or without application of N in the form of digested liquid manure or mineral N fertilizer. Weather conditions, soil inorganic N dynamics, and N<sub>2</sub>O emissions were monitored during spring, and soil samples were analyzed for abundances of nitrite reduction (<i>nirK</i> and <i>nirS</i>) and N<sub>2</sub>O reduction genes (<i>nosZ</i> clade I and II), and structure of nitrite- and N<sub>2</sub>O-reducing communities. Fertilization2018-01-01T00:00:00Z20182026-07-15T17:13:29.937Z2019-03-27T00:08:19ZS-EPMC62255433045008910.3389/fmicb.2018.02629