Measurement
- Version 1 of 1
Measurement Data Component
Title: Annual N2O measurements and associated data: AC0116, Ceredigion, 2011-2012
Related Party - Organisation (Author): ADAS
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 ADAS Pwllpeiran near Cwmystwyth, mid Wales (clay loam topsoil texture), direct N2O-N emissions were measured from replicated (x3) plots (5 x 15 m) arranged in a randomised block design. Dairy cattle slurry (c.30 m3/ha) and beef cattle FYM (25 t/ha) were applied to permanent grassland in autumn (late-September) and spring (early-May). The cattle slurry was applied using the ADAS small plot applicator set up for surface broadcast and trailing shoe application. The solid manure was spread by hand. In two separate treatments, the commercially available nitrification inhibitor - dicyandiamide (DCD) was applied by knapsack sprayer to the sward after slurry application by surface broadcast and trailing shoe to give a DCD application rate of 10 kg /ha (6.5 kg N/ha). An untreated control treatment was included where no manure was applied. Following manure application, measurements of direct N2O-N were made over c.12 months, using 5 static chambers (0.8 m2 total surface area) per plot and analysed by gas chromatography. In a separate area of the plot, a wind tunnel technique was used (one per plot) to measure ammonia-N emissions for 7 days after each manure application. Grass yields and N offtakes were measured following grass cuts in mid-June and early-September 2012. 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 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 to 2 decimal places.
Subject Keywords: Nitrous oxide; Cattle slurry; Cattle farmyard manure; Nitrification inhibitors; DCD; Grassland soils; Clay soils
Geographic Keywords: Ceredigion
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): -3.99 Longitude (East): -3.71 Latitude (South): 52.25 Latitude (North): 52.42 |
Phenomenon Time - Start Date/Time: 2011-09-28 End Date/Time: 2013-04-16
Result Time: 2013-04-16
Valid Time - Start Date/Time: 2011-09-28 End Date/Time: 2013-04-16
Feature of Interest: biosphere
Publication Date: 2017-04-05
This data is made available under the terms of the FBA Licence.
Total file downloads: 213
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