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Measurement Data Component

Title: Annual N2O measurements and associated data: NT26, Dumfries, 2004
Related Party - Individual (Point of Contact): Professor R.M. Rees (SRUC)
Related Party - Organisation (Author): The University of Edinburgh
Related Party - Organisation (Author): SRUC
Related Party - Organisation (Funder): Defra
Nitrous oxide emissions (2 closed static chambers/plot) were monitored for about 12 months, following the spring application, by hand, of various nitrogen fertilisers (ammonium nitrate, urea, urea+urease inhibitor nBTPT [trade name Agrotain®], urea ammonium sulphate) and from an untreated control. Three fertiliser applications were made in order to achieve the target, commercial rate of 220 kg N/ha. There were 3 replicate plots (2 x 6 m) of each treatment arranged in a randomised block design. The plots were established on grassland, on a sandy loam soil in south west Scotland, UK. Where measured, this dataset contains: annual nitrous oxide emissions (kg N2O-N/ha/year), annual nitrous oxide emission factors (% of total nitrogen applied), year experiment started, crop type, previous crop type, age of grass ley, soil texture, soil clay content, soil dry bulk density, soil organic carbon content, soil pH, total rainfall during the experimental period, nitrogen source, experimental treatments, application timing, block number, total nitrogen applied, readily available nitrogen (i.e. if present, the sum of ammonium-N and nitrate-N) applied, cumulative ammonia emissions, cumulative nitrate leaching loss, crop yield and crop total nitrogen offtake. ND = not determined. NA = not applicable. nBTPT = N-(n-butyl) thiophosphoric triamide. The N2O emission factors & annual cumulative N2O values have been extrapolated to a 365 day measurement period. 'Rainfall during the experimental period' = cumulative rainfall from the first day of fertiliser application to the last day of N2O sampling. The N2O emission factors are calculated using annual cumulative N2O values to 15 decimal places, however the annual cumulative N2O and emission factor values have been reported elsewhere to 2 decimal places. Note: in the paper reporting these results (Smith K A, Dobbie K E, Thorman R, Watson C J, Chadwick D R, Yamulki S and Ball B C 2012 The effect of N fertilizer forms on nitrous oxide emissions from UK arable land and grassland Nutr. Cycl. Agroecosyst. 93 127–49) the annual cumulative N2O emissions (and hence Emission Factors) have been calculated differently to those reported here.
Subject Keywords: Nitrous oxideManufactured nitrogen fertilizersAmmonium nitrateUreaUrea ammonium sulphate fertilizersUrease inhibitorsGrassland soilsSandy soils
Geographic Keywords: Dumfries and Galloway
Observed Properties: Ammonia emissionApplication timingCrop nitrogen offtakeCrop yieldCropsEmission factorExperimental blockingExperimental treatmentGrass ley ageNitrate leachingNitrogen sourceNitrous oxide mass fluxRainfallReadily available-nitrogenSoil clay contentSoil dry bulk densitySoil organic carbonSoil pHSoil textureTotal nitrogenYear
Parameter: Age of grass ley
Parameter: Annual nitrous oxide emission
Parameter: Annual nitrous oxide emission factor (% of total nitrogen applied)
Parameter: Application timing
Parameter: Block number
Parameter: Clay content
Parameter: Crop total nitrogen offtake
Parameter: Crop type
Parameter: Crop yield
Parameter: Cumulative ammonia emission
Parameter: Cumulative nitrate leaching loss
Parameter: Nitrogen source
Parameter: Previous crop type
Parameter: Rainfall during the experimental period
Parameter: Readily available-nitrogen applied
Parameter: Soil dry bulk density
Parameter: Soil organic carbon
Parameter: Soil pH
Parameter: Soil texture
Parameter: Total nitrogen applied
Parameter: Treatment
Parameter: Year experiment started

Geographic Extent -
    Longitude (West): -3.72
    Longitude (East): -3.46
    Latitude (South): 54.97
    Latitude (North): 55.13

Phenomenon Time -  Start Date/Time: 2004-03-10 End Date/Time:  2005-01-26
Result Time: 2005-01-26
Valid Time -  Start Date/Time: 2004-03-10 End Date/Time:  2005-01-26
Feature of Interest: biosphere
Publication Date: 2017-04-07

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

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