Syringic acid from rice roots inhibits soil nitrification and N₂O emission under red and paddy soils but not a calcareous soil.

ABSTRACT: Syringic acid (SA) is a novel biological nitrification inhibitor (BNIs) discovered in rice root exudates with significant inhibition of Nitrosomonas strains. However, the inhibitory effect of SA on nitrification and nitrous oxide (N₂O) emissions in different soils and the environmental factors controlling the degree of inhibition have not been studied. Using 14-day microcosm incubation, we investigated the effects of different concentrations of SA on nitrification activity, abundance of ammonia-oxidizing microorganisms, and N₂O emissions in three typical agricultural soils. The nitrification inhibitory efficacy of SA was strongest in acidic red soil, followed by weakly acidic paddy soil, with no significant effect in an alkaline calcareous soil. Potential nitri

SUBMITTER: Lu Y 

PROVIDER: S-EPMC9808040 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature