Nitrous oxide emissions from grassland and spring barley, following N fertiliser application with and without nitrification inhibitors

1997 ◽  
Vol 25 (3) ◽  
pp. 261-268 ◽  
Author(s):  
I. P. McTaggart ◽  
H. Clayton ◽  
J. Parker ◽  
L. Swan ◽  
K. A. Smith
Keyword(s):  
Nitrous Oxide ◽  
Spring Barley ◽  
Nitrous Oxide Emissions ◽  
Nitrification Inhibitors ◽  
Fertiliser Application

The nitrification inhibitor DMPP applied to subtropical rice has an inconsistent effect on nitrous oxide emissions

Soil Research ◽  
2017 ◽  
Vol 55 (6) ◽  
pp. 547 ◽  
Author(s):  
Terry J. Rose ◽  
Stephen G. Morris ◽  
Peter Quin ◽  
Lee J. Kearney ◽  
Stephen Kimber ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Nitrification Inhibitor ◽  
Nitrous Oxide Emissions ◽  
N2o Emissions ◽  
Aerobic Rice ◽  
Growing Period ◽  
Tropical Environments ◽  
Peak Flux ◽  
Coated Urea ◽  
Fertiliser Application

Although there is growing evidence that the nitrification inhibitor 3,4-dimethylpyrazole phosphate (DMPP) can lower soil nitrous oxide (N2O) emissions in temperate environments, there is little evidence of its efficacy in subtropical or tropical environments where temperatures and rainfall intensities are typically higher. We investigated N2O emissions in field-grown aerobic rice in adjacent fields in the 2013–14 and 2014–15 seasons in a subtropical environment. Crops were topdressed with 80 kg nitrogen (N) ha–1 before rainfall, as either urea, urea + DMPP (at 1.6 kg DMPP t–1 urea: ‘urea-DMPP’) or a blend of 50% urea and 50% urea-DMPP in the 2013–14 season, and urea, urea-DMPP or polymer (3 month)-coated urea (PCU) in the 2014–15 season. DMPP-urea significantly (P < 0.05) lowered soil N2O emissions in the 2013–14 season during the peak flux period after N fertiliser application, but had no effect in 2014–15. The mean cumulative N2O emissions over the entire growing period were 190 g N2O-N ha–1 in 2013–14 and 413 g N2O-N ha–1 in 2014–15, with no significant effect of DMPP or PCU. Our results demonstrate that DMPP can lower N2O emissions in subtropical, aerobic rice during peak flux events following N fertiliser application in some seasons, but inherent variability in climate and soil N2O emissions limited the ability to detect significant differences in cumulative N2O flux over the seasonal assessment. A greater understanding of how environmental and soil factors impact the efficacy of DMPP in the subtropics is needed to formulate appropriate guidelines for its use commercially.

Nitrous oxide emissions and nitrogen use efficiency of manure and digestates applied to spring barley

2017 ◽  
Vol 239 ◽  
pp. 188-198 ◽  
Author(s):  
Khagendra R. Baral ◽  
Rodrigo Labouriau ◽  
Jørgen E. Olesen ◽  
Søren O. Petersen
Keyword(s):  
Nitrous Oxide ◽  
Nitrogen Use Efficiency ◽  
Spring Barley ◽  
Nitrous Oxide Emissions ◽  
Nitrogen Use ◽  
Use Efficiency

Timing of Manure Injection and Nitrification Inhibitors Impacts on Nitrous Oxide Emissions and Nitrogen Transformations in a Barley Crop

2017 ◽  
Vol 81 (6) ◽  
pp. 1595-1605 ◽  
Author(s):  
Sisi Lin ◽  
Guillermo Hernandez-Ramirez ◽  
Len Kryzanowski ◽  
Trevor Wallace ◽  
Robert Grant ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Nitrous Oxide Emissions ◽  
Nitrification Inhibitors ◽  
Nitrogen Transformations ◽  
Barley Crop
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