Measurement
- Version 1 of 1
Measurement Data Component
Title: Daily nitrous oxide (N2O) flux measurements: AC0213, Devon, 2011
Related Party - Organisation (Author): Rothamsted Research - North Wyke
Related Party - Organisation (Funder): Defra
Abstract:
At a grassland site near Rothamsted Research, North Wyke in south-west England (sandy clay loam topsoil texture), direct nitrous oxide (N2O) and ammonia (NH3) emissions were measured from replicated (x3) plots (12 x 13 m) following spring applications of manufactured nitrogen (N) fertilisers to grassland. A control treatment was included where no N fertiliser was applied. Ammonium nitrate (AN) fertiliser (34.5% N), urea fertiliser (46% N) or an ammonium sulphate nitrate (ASN) fertiliser (26% N) were applied at a rate of 120 kg N ha-1 in two equal split applications (mid- and late April). In separate treatments, two commercially available nitrification inhibitors were tested; dicyandiamide (DCD) was sprayed onto the AN and urea plots immediately after N fertiliser application, and a 3,4-dimethylpyrazole phosphate (DMPP) containing fertiliser (26% N) was also applied at a rate of 120 kg N ha-1, in two split applications. The DCD was applied in a solution (15 kg DCD ha-1) and sprayed onto the plots immediately after N fertiliser application. The N supplied by the DCD was accounted for in the 120 kg N ha-1. As separate treatments, AN and urea fertiliser were also applied in four equal splits 1 week apart from mid-April to early May i.e. 'little and often'. Following N fertiliser application, measurements of direct N2O-N were made over c.12 months, using 5 static chambers (0.8 m2 total surface area) per plot and analysed by gas chromatography. This dataset is of daily nitrous oxide flux (g N2O-N/ha/d) measurements. ND = not determined. DMPP = 3,4-dimethylpyrazole phosphate. If the data file is downloaded/opened in excel, dates may appear as dd-mm-yy instead of the standard yy-mm-dd.
Subject Keywords: Nitrous oxide; Ammonium nitrate; Urea; Nitrification inhibitors; Grassland soils; Ammonium sulphate nitrate
Geographic Keywords: Devon
Observed Properties: Date; Experimental blocking; Experimental treatment; Nitrous oxide mass flux; Year
Parameter: Block number
Parameter: Daily nitrous oxide emission
Parameter: Measurement date
Parameter: Treatment
Parameter: Year experiment started
Geographic Extent - Longitude (West): -4.03 Longitude (East): -3.76 Latitude (South): 50.72 Latitude (North): 50.89 |
Phenomenon Time - Start Date/Time: 2011-04-14 End Date/Time: 2012-04-12
Result Time: 2012-04-12
Valid Time - Start Date/Time: 2011-04-14 End Date/Time: 2012-04-12
Feature of Interest: biosphere
Publication Date: 2017-02-03
This data is made available under the terms of the FBA Licence.
Total file downloads: 113
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