The effect of soil pH and dicyandiamide (DCD) on N2O emissions and ammonia oxidiser abundance in a stimulated grazed pasture soil
Aimee Robinson, Hong Jie Di, Keith C Cameron, Andriy Podolyan, Jizheng He
Journal of Soils and Sediments | SPRINGER HEIDELBERG | Published : 2014
Purpose: Nitrous oxide (N2O) is a potent greenhouse gas which is mainly produced from agricultural soils through the processes of nitrification and denitrification. Although denitrification is usually the major process responsible for N2O emissions, N2O production from nitrification can increase under some soil conditions. Soil pH can affect N2O emissions by altering N transformations and microbial communities. Bacterial (AOB) and archaeal (AOA) ammonia oxidisers are important for N2O production as they carry out the rate-limiting step of the nitrification process. Material and methods: A field study was conducted to investigate the effect of soil pH changes on N2O emissions, AOB and AOA com..View full abstract
We thank the New Zealand Agricultural Greenhouse Gas Centre for funding the research project and for providing a scholarship to A. R; and Carole Barlow, Manjula Premaratne, Steve Moore, Neil Smith, Glen Treweek and Jie Lei of Lincoln University for the technical support.