Measurement
- Version 1 of 1
Measurement Data Component
Title: Fertiliser application dates: AC0116, County Down, 2011
Related Party - Organisation (Author): AFBI
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 the AFBI Hillsborough research farm near Hillsborough, south-east Northern Ireland (clay loam topsoil texture), direct N2O-N emissions were measured using 40 x 40 cm stainless steel static chambers from replicated (x3) plots (2 x 16 m) following spring applications of manufactured nitrogen (N) fertilisers to permanent grassland. A control treatment was included where no N fertiliser was applied. Calcium ammonium nitrate (CAN) fertiliser (27% 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-March, mid-April, mid-May and early-July). Additionally, CAN fertiliser was also applied in six splits in late-March, early-April, mid-April, late-April, mid-May and early-July; the first four splits were of 30-40 kg/N ha i.e. ‘little and often’. In separate CAN 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 CAN and urea plots (2% solution) immediately after N fertiliser application at a rate of 320 kg N/ha, in four split applications. A DCD only treatment was also included, where DCD was sprayed onto the soil surface at a rate equivalent to 10 kg DCD/ha, in four split applications. This essentially gave a Control + DCD treatment which meant that N supplied by the DCD in the CAN + DCD and Urea + DCD did not need to be accounted for. Two extra treatments were included by AFBI at the Hillsborough site; 1) Urea granules coated with a powder of the commercially available urease inhibitor (Agrotain) to c.400 ppm and applied evenly by hand in four split applications to give a total N application rate of 320 kg N/ha; 2) Agrotain coated urea granules (c.400 ppm), applied evenly by hand in four split applications to give a total N application rate of 320 kg N/ha, with DCD sprayed immediately over the fertiliser after application at a rate equivalent to 10 kg DCD/ha. In any of the relevant treatments, the N supplied by the DCD was not accounted for in the 320 kg N/ha application, due to the Control + DCD treatment (outlined above). 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; Calcium ammonium nitrate; Urea; Nitrification inhibitors; DCD; Urease inhibitors
Geographic Keywords: County Down
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): -6.22 Longitude (East): -5.95 Latitude (South): 54.37 Latitude (North): 54.53 |
Phenomenon Time - Start Date/Time: 2011-03-22 End Date/Time: 2012-03-13
Result Time: 2011
Valid Time - Start Date/Time: 2011-03-22 End Date/Time: 2012-03-13
Feature of Interest: biosphere
Publication Date: 2017-04-05
This data is made available under the terms of the FBA Licence.
Total file downloads: 348
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