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Effective management practices to reduce nitrous oxide emissions from sugarcane soils. Ingham and Bundaberg, Queensland, 2012-2015 [Theme 5: Reducing emissions through improved NUE]

Data Set Citation

Wang W of Department of Science, Information Technology Innovation and the Arts. Effective management practices to reduce nitrous oxide emissions from sugarcane soils. Ingham and Bundaberg, Queensland, 2012-2015 [Theme 5: Reducing emissions through improved NUE].
datalibrarian.193.5 (http://www.n2o.net.au/knb/metacat/datalibrarian.193.5/html).

Metadata download:
Ecological Metadata Language (EML) File
Data Table
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Data Set Owner(s):
Individual:
Dr. Weijin Wang
Organization:
Department of Science, Information Technology Innovation and the Arts
Position:
Soil Scientist
Address:
GPO Box 2454,
Brisbane,
QLD 4001
AUSTRALIA
Phone:
+61 (7) 3170 5768 (voice)
Phone:
+61 (7) 3170 5801 (fax)
Email Address:
weijin.wang@science.dsitia.qld.gov.au
Web Address:
http://www.qld.gov.au/dsitia/
Associated Party
Individual:
Dr. Barry Salter
Organization:
BSES Ltd
Position:
Agronomist
Address:
26135 Peak Downs Highway,
Te Kowai,
QLD 4740
Australia
Phone:
+61 7 4963 6802 (voice)
Phone:
+61 7 4945 5167 (fax)
Email Address:
bsalter@bses.com.au
Web Address:
http://www.bses.org.au
Role:
Field experiment maintenance and data collection
Individual:
Mr. Neil Halpin
Organization:
Department of Agriculture Fisheries and Forestry
Position:
Senior Agronomist
Address:
49 Ashfield Street,
Bundaberg,
QLD 4670
Australia
Phone:
+61 7 4132 5538 (voice)
Phone:
+61 7 4155 6129 (fax)
Email Address:
neil.halpin@daff.qld.gov.au
Web Address:
http://www.daff.qld.gov.au
Role:
Field experiment maintenance and data collection
Abstract

High nitrous oxide (N2O) emissions have been observed in previous field studies in Australian sugarcane cropping systems. These observations demonstrate a genuine need and great potentials for developing effective mitigation strategies. In this project, we are using a combination of automatic gas sampling systems and manual chambers to investigate effective management practices for reducing N2O emissions in the wet tropical and subtropical sugarcane production regions. The major objectives of this project were to (i) investigate the efficacy of DMPP and polymer coating on mitigating N2O emissions, reducing N fertiliser application rates and increasing fertiliser N use efficiency whilst maintaining or enhancing crop yield in the wet tropics where normal fertiliser N is susceptible to losses by denitrification, leaching and runoff; and (ii) identify better soybean residue management practices for mitigating N2O emissions and maximising N use efficiency in the subtropics where leguminous crop rotation is recommended as one of the sustainable management practices in future farming systems. To address objective 1 a field experiment was setup near Ingham, in northern Queensland, while another field experiment was setup near Bundaberg in Queensland, to address objective 2.

Keywords
  • Nitrous oxide
  • Sugarcane
  • Nitrification inhibitors
  • Greenhouse gases
  • Soybean
  • Urea
  • Legume rotation
  • DMPP
  • Bundaberg
  • Ingham
  • QLD
anzsrc-for
  • 0502
  • 0799
  • 0701
Geographic Coverage
Geographic Description:
Ingham
Bounding Coordinates:
West:  
146.15  degrees
East:  
146.15  degrees
North:  
-18.65  degrees
South:  
-18.65  degrees
Geographic Description:
Bundaberg
Bounding Coordinates:
West:  
152.35  degrees
East:  
152.35  degrees
North:  
-24.87  degrees
South:  
-24.87  degrees
Temporal Coverage
Begin:
2012
End:
2015
Contact(s)
Individual:
Dr. Weijin Wang
Organization:
Department of Science, Information Technology Innovation and the Arts
Position:
Soil Scientist
Address:
GPO Box 2454,
Brisbane,
QLD 4001
AUSTRALIA
Phone:
+61 (7) 3170 5768 (voice)
Phone:
+61 (7) 3170 5801 (fax)
Email Address:
weijin.wang@science.dsitia.qld.gov.au
Web Address:
http://www.qld.gov.au/dsitia/
Methods Info
Step 1:
Description:
Ingham treatments to address objective 1
(1) 0N: Control, no nitrogen fertiliser applied;(2) 140N_U: Normal urea applied at 140 kg/ha (recommended rate);(3) 140N_PCU: Polymer-coated urea at 140 kg N/ha;(4) 140N_U+DMPP: DMPP-coated urea at 140 kg N/ha;(5) 100N_U: Normal urea at 100 kg N/ha (sub-optimal rate; not measured for N2O emissions);(6) 100N_PCU: Polymer-coated urea at 100 kg N/ha;(7) 100N_U+DMPP: Urea added with DMPP at 100 kg N/ha
Instrument(s):
  • Automated gas sampling chambers (50cm L * 50cm W)
  • Manual gas sampling chambers (50cm L * 50cm W)
Step 2:
Description:
Bundaberg treatments to address objective 2
(1). BF-T-S-0N: Bare fallow followed by tillage and sugarcane crop with no nitrogen fertiliser applied;(2). BF-T-S-150N: Bare fallow followed by tillage and sugarcane crop with nitrogen fertiliser applied as urea at 150 kg N/ha (normal application rate);(3). SF-T -S: Soybean fallow with grain harvested followed by tillage (incorporation of soybean residues into soil) and sugarcane planting, perhaps with supplementary nitrogen fertiliser depending on the soybean biomass yield;(4). SF-NT-S: Same as (3) but soybean residues laid on the soil surface (no-till);(5). SF-T+DMPP-S: Same as (3) but the soybean residues are sprayed with the nitrification inhibitor DMPP before tillage.(6). SF-NT+DMPP-S: Same as (4) but the soybean residues are sprayed with DMPP.
Instrument(s):
  • Automated gas sampling chambers (50cm L * 50cm W)
  • Manual gas sampling chambers (50cm L * 50cm W)
Sampling Area And Frequency:

Treatments at the Ingham site were arranged in a randomised block design with four replicates. The plots were 20 m long with a 1 m buffer zone between blocks and 8.4 m wide with 5 crop rows planted in the middle of approximately 1 m wide beds. Treatments at the Bundaberg site were arranged in a randomised block design with four replications for each treatment. Each plot measured 20 m long with a 1-m gap between two adjacent plots and 9.15 m wide (5 beds) with one crop bed as a buffer between two neighbouring plots. Automatic chambers measured CH4, N2O and CO2 fluxes continually approximately every 2 to 3 hours. Manual gas samples were taken 2 to 3 days a week between 9am and 11am.

Sampling Description:

The automatic gas sampling system delivered gas samples to a gas chromatograph eqipped with an ECD and FID to measure N2O and CH4 respectively, while a li-cor was used to continuously measure CO2 concentrations. Gas samples taken using the manual chamber method were stored in exetainers and analysed in a laboratory using a gas chromatograph equipped with an ECD, FID and TCD for the determintation of N2O, CH4, and CO2 respectively.

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