Directly, By Providing Nitrite And, After Further Oxidation, Nitrate to Denitrifiers, the Bacterial And
Archaeal Nitrification of Ammonia Is a Substantial Source to Worldwide Nox Emissions. Due to the Huge
And Continuous Increases In the Usage of Ammonia-Based Fertilisers, Which Have Been Driven By The
Demand For Higher Food Production But Also Serve As a Source of Energy For Ammonia Oxidizers,
Terrestrial Settings Are the Primary Contributors to Growing N2 O Emissions (Ao). Many Metabolic
Processes In Ao, Sometimes In Conjunction With Abiotic Mechanisms, Lead to the Direct Synthesis of N2
O. Ammonia-Oxidizing Archaea (Aoa), Ammonia-Oxidizing Bacteria (Aob), and Comammox Bacteria All
Have Their Own Unique Physiological Traits and Methods For Producing N2 O, Which Set Them Apart From
One Another. In Terms of N2 O Production, Aob Much Outstrips the Other Two Types. Many Studies Have
Shown That Aoa and Aob Live In Discrete Ecological Niches Because of the Differences Between Their
Natural and Man-Made Habitats. For Instance, Low Soil Ph and a Slow Rate of Ammonium Delivery Promote
Aoa, Which Is Similar to the Use of Delayed-Release Fertiliser, While a Rapid Rate of Supply Promotes Aob,
Which Is Similar to the Use of Highly Concentrated Inorganic Ammonium or Urea. These Differences
Between Aoa and Aob Provide a Potential Avenue For Improved Fertilisation Strategies, Which Might Lead
To Greater Fertiliser Use Efficiency and Reduced N2 O Emissions from Agricultural Soils. In This P ...