Nitrogen (N) fertilizer management in agricultural field affects soil N budget that can have significant implication greenhouse gas emission and environmental pollution. This study investigates the effects of nitrification inhibitors Dicyandiamide (DCD) 3,4-dimethyl pyrazole phosphate (DMPP) with urea application on microbial community a subtropical pasture field. A experiment consisting four t...

The influence of burrow spacing on sedimentary nitrification and denitrification was simulated experimentally using sediment plugs of different thicknesses immersed in aerated seawater reservoirs. Different plug thicknesses mimic different distances between oxygenated burrow centers and produce similar changes in aerobic–anaerobic reaction balances as a function of diffusive transport scaling. ...

Knowledge of relative NH(4+)-N to NO(2-)-N oxidation and NO(2-)-N to NO(3-)-N oxidation dynamics is essential before application of either single-step or two-step nitrification models to fit batch nitrification respirograms. We have previously shown that two step nitrification models based on respirometry permit the estimation of kinetic parameters for both nitrification steps from a single res...

Nitrification in the hyporheic zone of Sycamore Creek, a Sonoran Desert stream, was examined, focusing on the association between respiration and nitrate production. Subsurface respiration in Sycamore Creek is highest in regions of hydrologic downwelling where organic matter derived from the stream surface is transported into the hyporheic zone. Similarly, nitrification was closely related to h...

Fixed nitrogen (N) removal from estuaries via coupled nitrification–denitrification plays a significant role in the global N cycle and the biogeochemistry of individual estuaries. Much of our understanding of these processes is drawn from temperate estuaries, yet tropical and subtropical estuaries may respond differently to N inputs. I tested the hypothesis that nitrification is limited within ...

Nitrification inhibitors (NIs) can be used to reduce both NO3−-N leaching and N2O-N emissions. However, the comparative efficacies of NIs strongly affected by soil type. Therefore, four nitrification (dicyandiamide (DCD), 3, 4-dimethylpyrazole phosphate (DMPP), nitrogenous mineral fertilizers containing DMPP ammonium stabilizer (ENTEC) active ingredients: 3.00–3.25% 1, 2, 4-triazole 1.50–1.65% ...