Phylogenetic and functional potential links pH and N₂O emissions in pasture soils.

ABSTRACT: Denitrification is mediated by microbial, and physicochemical, processes leading to nitrogen loss via N₂O and N₂ emissions. Soil pH regulates the reduction of N₂O to N₂, however, it can also affect microbial community composition and functional potential. Here we simultaneously test the link between pH, community composition, and the N₂O emission ratio (N₂O/(NO + N₂O + N₂)) in 13 temperate pasture soils. Physicochemical analysis, gas kinetics, 16S rRNA amplicon sequencing, metagenomic and quantitative PCR (of denitrifier genes: nirS, nirK, nosZI and nosZII) analysis were carried out to characterize each soil. We found strong evidence linking pH to both N₂O emission ratio and community changes

SUBMITTER: Samad MS 

PROVIDER: S-EPMC5080606 | biostudies-literature | 2016 Oct

REPOSITORIES: biostudies-literature