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Ammonia loss from pasture : impact of the urease inhibitor NBPT. Murroon, Victoria, 2010 [Theme 1:Inhibitors for reducing emissions]

Data Set Citation

Chen D of The University of Melbourne and Suter H of The University of Melbourne. Ammonia loss from pasture : impact of the urease inhibitor NBPT. Murroon, Victoria, 2010 [Theme 1:Inhibitors for reducing emissions].
Suter.9.11 (http://www.n2o.net.au/knb/metacat/Suter.9.11/html).

Metadata download:
Ecological Metadata Language (EML) File
Licence
View Licence
Data Set Owner(s):
Individual:
Professor Deli Chen
Organization:
The University of Melbourne
Position:
Reader
Address:
Department of Resource Management and Geography, Melbourne School of Land and Environment,
The University of Melbourne,
Parkville,
VIC 3010
Australia
Phone:
+61 3 8344 8148 (voice)
Email Address:
delichen@unimelb.edu.au
Web Address:
http://www.findanexpert.unimelb.edu.au/researcher/person13219.html
Individual:
Dr. Helen Suter
Organization:
The University of Melbourne
Position:
Research Fellow
Address:
Department of Resource Management and Geography, Melbourne School of Land and Environment,
The University of Melbourne,
Parkville,
VIC 3010
Australia
Phone:
+61 3 8344 0179 (voice)
Phone:
+61 3 8344 5579 (fax)
Email Address:
helencs@unimelb.edu.au
Web Address:
http://www.findanexpert.unimelb.edu.au/researcher/person16560.html
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

This data package describes a field trial conducted to assess the influence of urea applied with and without a urease inhibitors NBPT, and as a fine particle (FPA) or liquid application (UAN) on loss of the indirect greenhouse gas ammonia (NH3) from a ryegrass pasture (Lolium perenne L) in autumn and spring of 2010. The trial was designed to assess both fertlizer type and seasonal impacts on NH3 loss. Ammonia loss was measured on 50 m diameter circles using a passive ammonia sampling system of Leunig et al (1985) where NH3 was trapped in centrally located acid traps. Data was collected on NH3 captured, soil mineral and urea N, plant biomass production and nitrogen content as well as local climatic conditions.

Keywords
  • NH3
  • Ammonia emissions
  • N-(n-butyl) thiophosphorictriamide
  • nBTP
  • Urease inhibitor
  • Agrotain
  • Green urea
  • Ammonia volatilisation
  • Pasture
  • Urea hydrolysis
  • Murroon
  • VIC
anzsrc-for
  • 0502
  • 0799
Geographic Coverage
Geographic Description:
Murroon, Victoria, Australia
Bounding Coordinates:
West:  
143.81  degrees
East:  
143.81  degrees
North:  
-38.43  degrees
South:  
-38.43  degrees
Temporal Coverage
Begin:
2010-04-12
End:
2010-12-23
Contact(s)
Individual:
Professor Deli Chen
Organization:
The University of Melbourne
Position:
Reader
Address:
Department of Resource Management and Geography, Melbourne School of Land and Environment,
The University of Melbourne,
Parkville,
VIC 3010
Australia
Phone:
+61 3 8344 8148 (voice)
Email Address:
delichen@unimelb.edu.au
Web Address:
http://www.findanexpert.unimelb.edu.au/researcher/person13219.html
Individual:
Dr. Helen Suter
Organization:
The University of Melbourne
Position:
Research Fellow
Address:
Department of Resource Management and Geography, Melbourne School of Land and Environment,
The University of Melbourne,
Parkville,
VIC 3010
Australia
Phone:
+61 3 8344 0179 (voice)
Phone:
+61 3 8344 5579 (fax)
Email Address:
helencs@unimelb.edu.au
Web Address:
http://www.findanexpert.unimelb.edu.au/researcher/person16560.html
Methods Info
Step 1:
Description:
Ammonia Volatilisation
Ammonia volatilization was studied in three treatedcircular plots of 25 m radius. The centres of the areaswere 200 m apart and the areas were located so that a linejoining the centres was perpendicular to the prevailingwind direction to ensure that NH3 emissions from one areadid not interfere with emissions from the others.Ammonia loss was determined with a simplified massbalance micrometeorological method using the Leuning etal. (1985) NH3 samplers. Duplicate samplers were used tomeasure horizontal flux density at 0.8m above the crop atthe centre of the circular areas and vertical flux wasdetermined following Denmead (1983) and Turner et al(2010). Background measurements were made with samplersplaced on masts located on the upwind side of the treatedareas. Ammonia emission was measured twice daily fromApril to May 2010, and September toOctober 2010. Ammonia captured in the Leuning samplers wasanalysed using a SAN++ segmented flow analyser (Skalar Analytical).
Instrument(s):
  • Leuning samplers.
  • Skalra SAN++ autoanalyser.
Step 2:
Description:
Soil Sampling
Soil samples were collected from within thecircles and the background area for Urea, NO3- and NH4+analysis using composites of 60 cores.Soil samples were immediately oven dried (40oC) inautumn, passed through a 2mm sieve and extracted in thelaboratory as soon as possible. In spring, samples were extracted onsite, to minimise the risk of urea loss in drying prior toextraction. Each composite sample was mixed and twosubsamples taken (~20 g soil, air dry basis in autumn; 25g field moist soil in spring) for analysis.Soils extractions (1:5 soil: solution ratio) were carried out in 250 mLplasticbottle, shaken for 2 hour with 100 mL of 2 M KClcontaining 5 mg/L phenylmercuric acetate solution andsamples were filtered through Whatman No 42 filter papers.The filtrate was collected and kept in a freezer (-20oC)and then defrosted and analysed for urea, NH4+, and NO3-using a Skalar SAN++ segmented flow analyser
Instrument(s):
  • Skalar SAN++ segmented flow analyser.
Step 3:
Description:
Biomass
Pasture biomass was collected from beneath a 2 x 1 mpasture cage one month after fertilization. Pasture sampleswere analysed at a commercial laboratory for biomass weight and Kjeldahl nitrogen.
Sampling Area And Frequency:

The trial was conducted on a two year old perennial ryegrass pasture (Lolium perenne) with two 3 week sampling campaigns, one commencing in April 2010 and the other commencing in September 2010. A single circle of 25 m diameter was used for each treatment and duplicate samplers were used to collect the NH3.

Sampling Description:

Duplicate ammonia traps for each treatment were changed twice daily at commencement of the trial and then less frequently to 21 days. Soil sampling as done every few days. Biomass samples were collected after 1 month

Project Info
Title:
Nitrous Oxide Research Program
Personnel:
Individual:
Professor Deli Chen
Organization:
The University of Melbourne
Position:
Reader
Address:
Department of Resource Management and Geography, Melbourne School of Land and Environment,
The University of Melbourne,
Parkville,
VIC 3010
Australia
Phone:
+61 3 8344 8148 (voice)
Email Address:
delichen@unimelb.edu.au
Web Address:
http://www.findanexpert.unimelb.edu.au/researcher/person13219.html
Role:
Principal Investigator
Individual:
Dr. Helen Suter
Organization:
The University of Melbourne
Position:
Research Fellow
Address:
Department of Resource Management and Geography, Melbourne School of Land and Environment,
The University of Melbourne,
Parkville,
VIC 3010
Australia
Phone:
+61 3 8344 0179 (voice)
Phone:
+61 3 8344 5579 (fax)
Email Address:
helencs@unimelb.edu.au
Web Address:
http://www.findanexpert.unimelb.edu.au/researcher/person16560.html
Role:
Principal Investigator
Funding:

DAFF/GRDC

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