Measurement

Download CSV Daily N2O AC0213 Cambridgeshire 2012.csv 0.11MB


Measurement Data Component

Title: Daily nitrous oxide (N2O) flux measurements: AC0213, Cambridgeshire, 2012
Related Party - Organisation (Author): ADAS UK Ltd.
Related Party - Organisation (Funder): Defra
Abstract:
On a commercial arable farm near Cambridge, eastern England (clay topsoil texture), direct nitrous oxide (N2O) and ammonia (NH3) emissions were measured from replicated (x3) plots (24 x 11 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), urea fertiliser (46% N) or an ammonium sulphate nitrate (ASN) fertiliser (26% N) were applied at a rate of 200 kg N/ha, in three split applications (mid-March, mid-April & early-May). In separate treatments, two commercially available nitrification inhibitors were tested; dicyandiamide (DCD) was sprayed at a rate of 10 kg/ha (6.5 kg N/ha) 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 200 kg N/ha, in three split applications. The N supplied by the DCD was accounted for in the 200 kg N/ha application. Additionally, AN and urea fertiliser was also applied in five equal splits in mid-March, late-March, mid-April, late-April and early-May i.e. 'little and often'. Following N fertiliser application, measurements of direct nitrous oxide (N2O) emissions 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. The first measurement is a 'background' measurement i.e. before any treatments were applied. 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; Ammonium sulphate nitrate; Nitrification inhibitors; Arable land; Clay soils
Geographic Keywords: Cambridgeshire
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): -0.16     Longitude (East): 0.11     Latitude (South): 52.19     Latitude (North): 52.35

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Phenomenon Time -  Start Date/Time: 2012-03-12 End Date/Time:  2013-03-13
Result Time: 2013-03-13
Valid Time -  Start Date/Time: 2012-03-12 End Date/Time:  2013-03-13
Feature of Interest: biosphere
Publication Date: 2017-02-03

This data is made available under the terms of the FBA Licence.

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Is Input Of	Is Part Of Dataset
	Nitrification inhibitors and fertiliser nitrogen application timing strategies to reduce N2O. Site in Cambridgeshire, 2012