Measurement
- Version 1 of 1
Measurement Data Component
Title: Daily topsoil mineral nitrogen: AC0116, Bedfordshire, 2011
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
Abstract:
At the Rothamsted Research Woburn farm near Woburn, east of England (loamy sand topsoil texture), direct nitrous oxide emissions were measured from replicated (x3) plots (10 x 6 m) following spring applications of manufactured nitrogen (N) fertilisers to winter wheat. A control treatment was included where no N fertiliser was applied. Ammonium nitrate (AN) fertiliser (34.5% N) was applied at 5 different rates; 60, 120, 180, 240 and 300 kg N/ha, and urea fertiliser (46% N) at a rate of 180 kg N/ha, in three split applications (mid-March, early-April and early-May). 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 180 kg N/ha, which was applied in three splits. A DCD only treatment was also included, where DCD was sprayed onto the soil surface in three split applications giving a total N application of 20 kg/ha. Additionally, AN fertiliser was also applied in five equal splits in mid-March, early-April, late-April, early-May and late-May i.e. ‘little and often’. This dataset contains topsoil mineral nitrogen values measured to a depth of 0-10 cm. Measurements were taken from all treatments, on selected days when nitrous oxide flux measurements were also made. The first measurement is a 'background' measurement i.e. before any treatments were applied. ND = not determined. 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: Soil mineral nitrogen; Top soil; Arable land; Winter wheat; Sandy soils
Geographic Keywords: Bedfordshire
Observed Properties: Ammonium-nitrogen; Date; Experimental blocking; Experimental treatment; Nitrate-nitrogen; Sampling depth; Year
Parameter: Block number
Parameter: Depth of soil sampling
Parameter: Measurement date
Parameter: Soil ammonium-nitrogen content
Parameter: Soil nitrate-nitrogen content
Parameter: Treatment
Parameter: Year experiment started
Geographic Extent - Longitude (West): -0.74 Longitude (East): -0.47 Latitude (South): 51.92 Latitude (North): 52.09 |
Phenomenon Time - Start Date/Time: 2011-03-07 End Date/Time: 2012-03-08
Result Time: 2012-03-08
Valid Time - Start Date/Time: 2011-03-07 End Date/Time: 2012-03-08
Feature of Interest: biosphere
Publication Date: 2017-04-05
This data is made available under the terms of the FBA Licence.
Total file downloads: 110
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