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Nitrous oxide emissions from urine patches - experiment 3. Terang, Victoria, 2012-2013 [Theme 1: Inhibitors for reducing emissions]

Data Set Citation

Kelly K of Future Farming Systems Research Division, Victorian Department of Environment and Primary Industries (Victoria). Nitrous oxide emissions from urine patches - experiment 3. Terang, Victoria, 2012-2013 [Theme 1: Inhibitors for reducing emissions].
kelly.38.26 (http://www.n2o.net.au/knb/metacat/kelly.38.26/html).

Metadata download:
Ecological Metadata Language (EML) File
Data Table
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Data Set Owner(s):
Individual:
Mr. Kevin Kelly
Organization:
Future Farming Systems Research Division, Victorian Department of Environment and Primary Industries (Victoria)
Position:
Project Leader
Address:
Private Bag 1,
Ferguson Road,
Tatura,
Victoria 3616
Australia
Phone:
+61 3 5833 5359 (voice)
Email Address:
kevin.kelly@depi.vic.gov.au
Associated Party
Individual:
Ms. Siobhann McCafferty
Organization:
Institute for Future Environments, Queensland University of Technology
Position:
Data Librarian
Address:
2 George Street,
Brisbane,
QLD 4001
Australia
Phone:
+61 7 3138 0457 (voice)
Email Address:
siobhann.mccafferty@qut.edu.au
Role:
Custodian/Steward
Abstract

A study of the impact of the nitrification inhibitors dicyandiamide (DCD) on nitrous oxide emissions from dairy cows urine deposited on pasture was conducted at Terang in south-western Victoria, Australia from July 2012 to August 2013. It was originally planned to apply components of treatment over 4 times periods (however due to issues around the use of DCD the experiment was terminated before the fourth application of urine). Initial experimental design was (4 treatments by 6 replicates) for soil sampling and two replicates of the 4 treatments for emissions measurement. Measurement system used automated chambers liked to a Fourier Transform infrared spectometer for gas analysis. Daily flux (g N2O-N/ha/day) was calculated for each chamber. Soil water (surface 0-65 mm) and soil temperature (50mm) was measured continuously in each chamber base. Soil mineral N content of all treatment and replicates was measured (0-100 mm) routinely. Initial site soil physical and chemical status were defined. Standard meteorological information was collected for an on-site weather station.

Keywords
  • Nitrous oxide
  • N2O
  • Nitrification inhibitors
  • Soil mineral nitrogen
  • Dicyandiamide (DCD)
  • Bovine urine
  • Pasture
  • Dairy Cattle
  • Terang
  • Auto Chambers
  • VIC
anzsrc-for
  • 0502
  • 0799
Geographic Coverage
Geographic Description:
DemoDAIRY, Terang, Victoria, Australia 38 14 S, 142 55 E
Bounding Coordinates:
West:  
142.92  degrees
East:  
142.92  degrees
North:  
-38.24  degrees
South:  
-38.24  degrees
Contact(s)
Individual:
Mr. Kevin Kelly
Organization:
Future Farming Systems Research Division, Victorian Department of Environment and Primary Industries (Victoria)
Position:
Project Leader
Address:
Private Bag 1,
Ferguson Road,
Tatura,
Victoria 3616
Australia
Phone:
+61 3 5833 5359 (voice)
Email Address:
kevin.kelly@depi.vic.gov.au
Methods Info
Step 1:
Description:
Flux Measurements
Flux was measured using 8 automatic enclosure chambers (0.8m*0.8m*0.47m) with air drawn from each chamber in sequence at a flow rate of approximately 3 L/min and passed through a glass cell mounted in a Fourier Transform Infrared spectrometer (FTIR), all air was recycled to chambers. Chambers are sampled in sequence (dictated by the software), with each chamber sampled for a 30 minute period each 4 hours. Daily flux (g N2O-N/ha/day) was calculated from 6 measurement periods on each chamber each day as an arithmetic mean. Each chamber had to fixed bases with the chamber moved very week.
Instrument(s):
  • -A Fourier Transform Infrared (FTIR) spectrometer, (Matrix-M IRcube supplied by Bruker Optics (Ettlingen, Germany), with a mid-IR globar source, CaF2 beamsplitter and thermoelectrically (TE) cooled MCT detector operating above 2000 cm-1) supplied as Spectronus (Ecotech Australia)
Step 2:
Description:
Soil water
Surface soil water content (0-65 mm), two probes per chamber base, logged every 30 minutes (averag of 10 minute readings)
Instrument(s):
  • Theta-Probes Delta T MK2x
Step 3:
Description:
Soil temperature
Soil temperature - logged every 30 minutes (averag of reading every 10 minutes)
Instrument(s):
  • Type-T thermocouples
Step 4:
Description:
Weather station
Standard measurement weather station
Instrument(s):
  • MEA - Australia
Sampling Area And Frequency:

July 2012 - August 2013

Sampling Description:

Originally planned to apply components of treatment over 4 times periods (however due to issues around the use of DCD the experiment was terminated before the fourth application of urine). Initial experimental design was (4 treatments by 6 replicates) for soil sampling and two replicates of the 4 treatments for emissions measurement. The treatments were Treatment 1 - nil applied, Treatment 2 - urine @1000 kgN/ha was original target however urine was only applied three times to 25% of chamber base at each application on 17 Sept 2012, 22 Nov 2012 and 16 May 2013 [Note each urine patch was applied @ 1000 kg N/ha, but given only 75% of the chamber base had urine applied, the overall rate was for the chamber base was 750 kg N/ha), Treatment 3 - urine @ 1000 kg N/ha applied to 25% of the chamber base 17 Sept 2012, 22 Nov 2012 and 16 May 2013 and with DCD @10 kg a.i./ha applied as surface spray on 17 Sept 2012 and again 16 May 2013 [Note as study was terminated before the final planned urine application as in treatment 2 the patch application rate of urine was 1000 kg N/ha, but only 75% of the area was treated with urine gievn an overall application of 750 kg N/ha], Treatment 4 - urine @ 1000 kg N/ha applied to 25% of the chamber base 17 Sept 2012, 22 Nov 2012, and 16 May 2013 with DCD is mixed in with urine at each application at a rate equivalent to 20 kg a.i./ha [Note see treatment 3 and 4 for explaination, as the planned fourth application did not occur].

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