Effects of Grassland Community Composition and Digestate Fertiliser on Nitrous Oxide Emissions from Soil

Published by: Teagasc

Licensed under: cc-by-nc

Category: Agriculture

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The dataset originates from a two-year field experiment (2022–2024) at Teagasc Johnstown Castle, Wexford, Ireland. It captures nitrous oxide (N₂O) emissions, emission intensities, and emission factors from grassland systems fertilised with either digestate (from an anaerobic digestion plant) or calcium ammonium nitrate (CAN). Four grassland community compositions were tested: perennial ryegrass monoculture, ryegrass with white clover, ryegrass with red clover, and a six-species mixture including grasses, legumes, and herbs. The dataset therefore integrates greenhouse gas fluxes, soil characteristics, climatic records (temperature, rainfall, air pressure), soil moisture, and agronomic performance data (yields, nitrogen uptake) across fertiliser treatments and grassland types

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Teagasc_Johnstown_grassland_N2O_dataset_2022-2024.

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Data Owner	Dr John Finn
Data Owner Email	john.finn@teagasc.ie
Theme	Agriculture
Rights notes	https://creativecommons.org/licenses/by-nc/4.0/
Language	English
Provenance information	Data collection involved high-resolution N₂O sampling following each fertiliser application: four times per week in the first two weeks, twice weekly in the next two weeks, and weekly thereafter until the next application. In winter months (November–March), sampling frequency was reduced to monthly. Cumulative N₂O emissions were calculated by trapezoidal integration of daily fluxes. Emission intensities were scaled to nitrogen yield, and emission factors estimated using IPCC and Global Research Alliance guidelines. In year one, digestate N application was unintentionally lower due to delays in nutrient analysis, but this was corrected in year two by pre-application C and N testing. The dataset was further refined through statistical analyses (using RStudio), with data transformations applied where needed to meet assumptions of normality and variance
OR: specify what period of time the dataset covers	April 2022 – April 2024
High Value Dataset (HVD)	No