Nitrous Oxide

Current research programme

The current focus of the NZAGRC’s nitrous oxide (N2O) research programme is on measuring the effects pasture plants and pasture plant communities have on nitrous oxide emissions.

This work is closely aligned to the MBIE P21 and Forages for Nitrate Leaching programmes (FRNL). In addition, an investigative project on a technology to locate and treat urine patches was completed in 2015/16.

Learn more about:

Principal investigators

Dr Cecile de Klein, AgResearch
Professor Hong Di, Lincoln University

Research Stories

1550 Keith Goulding (Rothamsted Research, UK)

Keith provided an international perspective on nitrous oxide and soil carbon research. With respect to N2O, he highlighted work on investigating the genes related to nitrous oxide emissions and noted that there is one clear message for reducing nitrous oxide, avoid excess nitrogen.

The IPCC has recently indicated that biochar may have a part to play in reducing agricultural GHGs and a number of research groups are searching for natural nitrification inhibitors.

Keith indicated that soil carbon needs to be considered carefully. Data were published that could be interpreted to imply that grasslands could continue to sequester carbon indefinitely. However, this has been refuted and there is agreement that for a specific system there is an upper limit for carbon, and he noted the interesting work in New Zealand in this area. t been proven yet, but it appears that the deeper roots also reduce run off significantly and thus could offer multiple benefits.

Keith concluded with a warning that too much emphasis on soil carbon sequestration could risk taking our eyes off more important climate change threats, such as land clearance and wetland drainage. He also stressed that our priorities should be promotion of good land stewardship and integrated solutions that consider the whole system and do not merely “pollution swap”.

Download presentation 

  1. pdf 12_Goulding_1550_International perspectives.pdf (5.37MB)

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