Measurement
- Version 1 of 1
Measurement Data Component
Title: Daily nitrous oxide flux measurements: AC0116, Devon, 2013
Related Party - Organisation (Author): Rothamsted Research - North Wyke
Related Party - Organisation (Funder): Defra
Related Party - Organisation (Funder): Scottish Government
Related Party - Organisation (Funder): Welsh Assembly Government
Related Party - Organisation (Funder): DAERA Northern Ireland
Abstract:
At Rothamsted Research - North Wyke near Okehampton, south-west England (clay loam topsoil texture), direct N2O-N emissions were measured from replicated (x3) plots (12 x 3m) 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) was applied at 5 different rates; 80, 160, 240, 320 and 400 kg N/ha, and urea fertiliser (46% N) at a rate of 320 kg N/ha, in four split applications (late-February, early-April, late-May and late-June). In separate AN and urea treatments, a commercially available nitrification inhibitor was tested; dicyandiamide (DCD) was sprayed at a rate equivalent to 10 kg DCD/ha onto the plots immediately after each N fertiliser application. The N supplied by the DCD was accounted for in the total N application of 320 kg N/ha, which was applied in four splits. Additionally, AN fertiliser was also applied in six splits in late-February, mid-March, early-April, mid-April, late-May and late-June; the first four splits were of 30-40 kg/N ha 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. 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; Manufactured nitrogen fertilizers; Ammonium nitrate; Urea; Nitrification inhibitors; Grassland soils; Clay soils
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): -4.04 Longitude (East): -3.75 Latitude (South): 50.68 Latitude (North): 50.85 |
Phenomenon Time - Start Date/Time: 2013-02-27 End Date/Time: 2014-02-19
Result Time: 2014-02-19
Valid Time - Start Date/Time: 2013-02-27 End Date/Time: 2014-02-19
Feature of Interest: biosphere
Publication Date: 2017-04-05
This data is made available under the terms of the FBA Licence.
Total file downloads: 97
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