Measurement
- Version 1 of 1
Measurement Data Component
Title: Fertiliser application dates: AC0116, Ceredigion, 2013
Related Party - Organisation (Author): ADAS
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:
On a commercial farm near Aberaeron, mid Wales (clay loam topsoil texture), direct N2O-N emissions were measured from replicated (x3) plots (4 x 15 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) 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 (early-March, early-April, late-May and mid-July). 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. A DCD only treatment was also included, where DCD was sprayed onto the soil surface in four split applications giving a total N application of 26 kg/ha. Additionally, AN fertiliser was also applied in six splits in early-March, mid-March, early-April, mid-April, late-May and mid-July; the first four splits were of 30-40 kg/N ha i.e. ‘little and often’. This dataset is of fertiliser application rates (i.e. total nitrogen applied) and dates applied. NA = not applicable. 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: Application timing; Application rates; Manufactured nitrogen fertilizers; Ammonium nitrate; Urea; Nitrification inhibitors; DCD
Geographic Keywords: Ceredigion
Observed Properties: Application timing; Experimental treatment; Total nitrogen
Parameter: Application date split 1
Parameter: Application date split 2
Parameter: Application date split 3
Parameter: Application date split 4
Parameter: Application date split 5
Parameter: Application date split 6
Parameter: Fertiliser Application Rate
Parameter: Fertiliser application rate split 1
Parameter: Fertiliser application rate split 2
Parameter: Fertiliser application rate split 3
Parameter: Fertiliser application rate split 4
Parameter: Fertiliser application rate split 5
Parameter: Fertiliser application rate split 6
Parameter: Nitrification inhibitor application rate
Parameter: Nitrification inhibitor application rate split 1
Parameter: Nitrification inhibitor application rate split 2
Parameter: Nitrification inhibitor application rate split 3
Parameter: Nitrification inhibitor application rate split 4
Parameter: Nitrification inhibitor application rate split 5
Parameter: Nitrification inhibitor application rate split 6
Parameter: Total nitrogen application rate
Parameter: Treatment
Geographic Extent - Longitude (West): -4.30 Longitude (East): -4.03 Latitude (South): 52.14 Latitude (North): 52.30 |
Phenomenon Time - Start Date/Time: 2013-03-04 End Date/Time: 2014-03-16
Result Time: 2013
Valid Time - Start Date/Time: 2013-03-04 End Date/Time: 2014-03-16
Feature of Interest: biosphere
Publication Date: 2017-04-05
This data is made available under the terms of the FBA Licence.
Total file downloads: 420
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