Measurement
- Version 1 of 1
Measurement Data Component
Title: Annual N2O measurements and associated data: AC0111, Oxfordshire, 2010-2011
Related Party - Organisation (Author): ADAS
Related Party - Organisation (Funder): Defra
Abstract:
An experiment was carried out at Faringdon (Oxfordshire, average annual rainfall 650 mm) on a heavy clay soil (54% clay) in harvest season 2011. Cattle slurry (c.50m3/ha) was applied to field-scale (40 m x 48 m) hydrologically isolated plots using trailing hose equipment in September 2010 (to stubble and grass), March and April 2011 (to a growing winter wheat crop) and March and July 2011 (to grass). Each plot was drained with pipe drains at 48 m spacing and 90 cm depth, supplemented by permeable fill to within 30 cm of the surface and secondary mole drains installed at right angles to the lateral drains at 50 cm depth and 2 m spacing. There were 3 replicates of each treatment arranged in a randomised block design. At each application timing a replicate control plot, receiving no slurry, was also established on each of the slurry treatments. Direct nitrous oxide emissions were measured from each treatment and the untreated control for 12 months using the static chamber technique (5 chambers per plot). Ammonia emissions were measured for 7 days after application using the micro-meteorological mass balance technique. Where treatments were applied in autumn, drainage volumes were measured continuously from each plot and drainage water samples (collected on a flow-proportional basis) were analysed for nitrate-N. 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, application method, block number, total nitrogen applied, readily available nitrogen (i.e. if present, the sum of ammonium-N, nitrate-N and uric acid-N) applied, cumulative ammonia emissions, cumulative nitrate leaching loss, crop yield, crop total nitrogen offtake, manure dry matter, manure pH, manure organic carbon, manure ammonium-N applied, manure nitrate-N applied, manure uric acid-N applied and time to incorporation. ND = not determined. NA = not applicable. 'Rainfall during the experimental period' = cumulative rainfall from the first day of manure application to the last day of N2O sampling. The soil organic carbon content and soil pH were measured in 2007. 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.
Subject Keywords: Nitrous oxide; Cattle slurry; Grassland soils; Arable land; Clay soils
Geographic Keywords: Oxfordshire
Observed Properties: Ammonia emission; Ammonium-nitrogen; Application methods; Application timing; Crop nitrogen offtake; Crop yield; Crops; Dry matter content; Emission factor; Experimental blocking; Experimental treatment; Grass ley age; Nitrate leaching; Nitrate-nitrogen; Nitrogen source; Nitrous oxide mass flux; Rainfall; Readily available-nitrogen; Soil clay content; Soil dry bulk density; Soil organic carbon; Soil pH; Soil texture; Time to incorporation; Total nitrogen; Total organic carbon; Uric acid-nitrogen; Year; pH
Parameter: Age of grass ley
Parameter: Annual nitrous oxide emission
Parameter: Annual nitrous oxide emission factor (% of total nitrogen applied)
Parameter: Application method
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: Manure ammonium-N applied
Parameter: Manure dry matter
Parameter: Manure nitrate-N applied
Parameter: Manure pH
Parameter: Manure total organic carbon
Parameter: Manure uric acid-N applied
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: Time to incorporation
Parameter: Total nitrogen applied
Parameter: Treatment
Parameter: Year experiment started
Geographic Extent - Longitude (West): -1.80 Longitude (East): -1.52 Latitude (South): 51.55 Latitude (North): 51.72 |
Phenomenon Time - Start Date/Time: 2010-09-07 End Date/Time: 2012-07-06
Result Time: 2012-07-06
Valid Time - Start Date/Time: 2010-09-07 End Date/Time: 2012-07-06
Feature of Interest: biosphere
Publication Date: 2017-04-11
This data is made available under the terms of the FBA Licence.
Total file downloads: 421
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