Abstract:
:One alternative to mineral fertilization is to use organic fertilizers. Our aim was to compare the impacts of 7-year applications of composted pig manure and ammonium nitrate on the structure and activity of the denitrifying community. Mineralization and organization of N, denitrification rates and N2O/N2 ratio were also investigated. Fourteen months after the last application, the potential denitrifying activity (+319%), N mineralization (+110%) and organization (+112%) were higher under pig compost than under ammonium nitrate fertilization. On the other hand, the N2O/(N2O+N2) ratio was lower (P<0.05, n=5) under organic fertilization. These effects of organic fertilization were in accordance with its higher total carbon content and microbial biomass. Fingerprints and clone library analyses showed that the structure of the denitrifying community was affected by the fertilization regime. Our results reveal that organic or mineral fertilizer applications could affect both structure and activity of the denitrifying community, with a possible influence on in situ N2O fluxes. These effects of the fertilization regime persisted for at least 14 months after the last application.
journal_name
FEMS Microbiol Ecoljournal_title
FEMS microbiology ecologyauthors
Dambreville C,Hallet S,Nguyen C,Morvan T,Germon JC,Philippot Ldoi
10.1111/j.1574-6941.2006.00064.xsubject
Has Abstractpub_date
2006-04-01 00:00:00pages
119-31issue
1eissn
0168-6496issn
1574-6941pii
FEM064journal_volume
56pub_type
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