Data

Greenhouse gas emissions from a well established, unfertilized subtropical grass-legume pasture

Queensland University of Technology
Grace, Peter ; Rowlings, David
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=info:doi10.4225/09/586b25f30ba1a&rft.title=Greenhouse gas emissions from a well established, unfertilized subtropical grass-legume pasture&rft.identifier=10.4225/09/586b25f30ba1a&rft.publisher=Queensland University of Technology&rft.description=Greenhouse gas emissions from a well established, unfertilized tropical grass-legume pasture were monitored over two consecutive years using high resolution automatic sampling. Nitrous oxide emissions were highest during the summer months and were highly episodic, related more to the size and distribution of rain events than WFPS alone. Mean annual emissions were significantly higher during 2008 (5.7 ± 1.0 g N2O-N ha day) than 2007 (3.9 ± 0.4 and g N2O-N ha day) despite receiving nearly 500 mm less rain. Mean CO2 (28.2 ± 1.5 kg CO2 C ha day) was not significantly different (P < 0.01) between measurement years, emissions being highly dependent on temperature. A negative correlation between CO2 and WFPS at >70% indicated threshold for soil conditions favouring denitrification. The use automatic chambers for high resolution greenhouse gas sampling can greatly reduce emission estimation errors associated with temperature and WFPS changes.&rft.creator=Grace, Peter &rft.creator=Rowlings, David &rft.date=2017&rft.edition=1&rft.relation=http://eprints.qut.edu.au/37655/&rft.relation=http://eprints.qut.edu.au/37656/&rft.coverage=northlimit=-26.5; southlimit=-28.625; westlimit=152.375; eastLimit=153.5; projection=WGS84&rft_rights=©&rft_subject=CO2&rft_subject=Humid&rft_subject=improved pasture&rft_subject=interannual&rft_subject=CH4&rft_subject=Subtropical&rft_subject=GEOCHEMISTRY&rft_subject=EARTH SCIENCES&rft_subject=N2O&rft_subject=ATMOSPHERIC SCIENCES&rft.type=dataset&rft.language=English Access the data

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Contact Information

Postal Address:
Associate Professor David Rowlings
Ph: +61 7 3138 9508

d.rowlings@qut.edu.au

Full description

Greenhouse gas emissions from a well established, unfertilized tropical grass-legume pasture were monitored over two consecutive years using high resolution automatic sampling. Nitrous oxide emissions were highest during the summer months and were highly episodic, related more to the size and distribution of rain events than WFPS alone. Mean annual emissions were significantly higher during 2008 (5.7 ± 1.0 g N2O-N ha day) than 2007 (3.9 ± 0.4 and g N2O-N ha day) despite receiving nearly 500 mm less rain. Mean CO2 (28.2 ± 1.5 kg CO2 C ha day) was not significantly different (P < 0.01) between measurement years, emissions being highly dependent on temperature. A negative correlation between CO2 and WFPS at >70% indicated threshold for soil conditions favouring denitrification. The use automatic chambers for high resolution greenhouse gas sampling can greatly reduce emission estimation errors associated with temperature and WFPS changes.

Data time period: 03 2007 to 28 02 2009

Click to explore relationships graph

153.5,-26.5 153.5,-28.625 152.375,-28.625 152.375,-26.5 153.5,-26.5

152.9375,-27.5625

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