Microbial N Transformations and N2O Emission after Simulated Grassland Cultivation: Effects of the Nitrification Inhibitor 3,4-Dimethylpyrazole Phosphate (DMPP).

ABSTRACT: Grassland cultivation can mobilize large pools of N in the soil, with the potential for N leaching and N₂O emissions. Spraying with the nitrification inhibitor 3,4-dimethylpyrazole phosphate (DMPP) before cultivation was simulated by use of soil columns in which the residue distribution corresponded to plowing or rotovation to study the effects of soil-residue contact on N transformations. DMPP was sprayed on aboveground parts of ryegrass and white clover plants before incorporation. During a 42-day incubation, soil mineral N dynamics, potential ammonia oxidation (PAO), denitrifying enzyme activity (DEA), nitrifier and denitrifier populations, and N₂O emissions were investigated. The soil NO₃^- pool was enriched with ¹⁵N to trace source

SUBMITTER: Duan YF 

PROVIDER: S-EPMC5165114 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature