Anaerobic ammonia oxidation in a fertilized paddy soil.

ABSTRACT: Evidence for anaerobic ammonium oxidation in a paddy field was obtained in Southern China using an isotope-pairing technique, quantitative PCR assays and 16S rRNA gene clone libraries, along with nutrient profiles of soil cores. A paddy field with a high load of slurry manure as fertilizer was selected for this study and was shown to contain a high amount of ammonium (6.2-178.8  mg  kg(-1)). The anaerobic oxidation of ammonium (anammox) rates in this paddy soil ranged between 0.5 and 2.9  nmol N per gram of soil per hour in different depths of the soil core, and the specific cellular anammox activity observed in batch tests ranged from 2.9 to 21  fmol per cell per day. Anammox contributed 4-37% to soil N2 production, the remainder being due to denitrification. The 16S rRNA gene sequences o

SUBMITTER: Zhu G 

PROVIDER: S-EPMC3223303 | biostudies-literature | 2011 Dec

REPOSITORIES: biostudies-literature