Managing fertiliser nitrogen to reduce nitrous oxide emissions and emission intensities from a cultivated Cambisol in Scotland

Hinton, Nicola; Cloy, Joanna M.; Bell, M. J.; Chadwick, David R.; Topp, Cairistiona F. E.; Rees, Robert M.

doi:10.1016/j.geodrs.2014.12.002

Cited by 31 publications

(29 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This can partly be explained by the smaller application rates in the earlier doses (Table 2), and thus the lower level of soil mineral N available for nitrification and denitrification until after the final application, but also by the rainfall and soil moisture status at these times. The fact that the time lag between final fertiliser application and peak N 2 O emissions was shortest at Gilchriston suggests either a lower mineral N threshold for N 2 O production at this site, or that other environmental thresholds were crossed before soil N had peaked at this site, allowing the production of N 2 O (also see Hinton et al, 2015). Although soil mineral N remained high at Rosemaund after fertiliser application it was not accompanied by further N 2 O emission peaks, indicating that other limiting factors, in particular rainfall, must have prevented the production of N 2 O, emphasising the complex nature of this process.…”

Section: Discussionmentioning

confidence: 97%

Nitrous oxide emissions from fertilised UK arable soils: Fluxes, emission factors and mitigation

Bell

Hinton

Cloy

et al. 2015

Agriculture, Ecosystems & Environment

Self Cite

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 97%

Nitrous oxide emissions from fertilised UK arable soils: Fluxes, emission factors and mitigation

Bell

Hinton

Cloy

et al. 2015

Agriculture, Ecosystems & Environment

Self Cite

View full text Add to dashboard Cite

“…The most important factors are soil moisture, soil carbon content, and soil pH31323334. For example, nitrate-containing fertilizers such as AN tend to release more N 2 O if denitrification is supported by wet and therefore partly anaerobic soil conditions accompanied by high soluble soil carbon content353637. Whereas urea and ammonium fertilizers can release higher rates of N 2 O under rather dry conditions3839.…”

Section: Discussionmentioning

confidence: 99%

Direct Nitrous Oxide Emissions From Tropical And Sub-Tropical Agricultural Systems - A Review And Modelling Of Emission Factors

Albanito

Lebender

Cornulier

et al. 2017

Sci Rep

View full text Add to dashboard Cite

There has been much debate about the uncertainties associated with the estimation of direct and indirect agricultural nitrous oxide (N2O) emissions in developing countries and in particular from tropical regions. In this study, we report an up-to-date review of the information published in peer-review journals on direct N2O emissions from agricultural systems in tropical and sub-tropical regions. We statistically analyze net-N2O-N emissions to estimate tropic-specific annual N2O emission factors (N2O-EFs) using a Generalized Additive Mixed Model (GAMM) which allowed the effects of multiple covariates to be modelled as linear or smooth non-linear continuous functions. Overall the mean N2O-EF was 1.2% for the tropics and sub-tropics, thus within the uncertainty range of IPCC-EF. On a regional basis, mean N2O-EFs were 1.4% for Africa, 1.1%, for Asia, 0.9% for Australia and 1.3% for Central & South America. Our annual N2O-EFs, estimated for a range of fertiliser rates using the available data, do not support recent studies hypothesising non-linear increase N2O-EFs as a function of applied N. Our findings highlight that in reporting annual N2O emissions and estimating N2O-EFs, particular attention should be paid in modelling the effect of study length on response of N2O.

show abstract

“…Hinton et al. () found EFs from 0.44% to 0.56% for the five weeks following AN application, but annual EFs of 1.36, 0.9%6 and 1.08% for AN application rates of 120, 160 and 200 kg N ha −1 at the Scottish arable site. Smith et al.…”

Section: Discussionmentioning

confidence: 99%

“…Cumulative fluxes were calculated using the trapezoidal rule (area under the curve) to interpolate fluxes between sampling days (Bell, Hinton, et al., ; Bell, Rees, et al., ; Bell et al., ; Hinton et al., ) as follows:…”

Section: Methodsmentioning

confidence: 99%

Isolating the effect of soil properties on agricultural soil greenhouse gas emissions under controlled conditions

Miller

Rees

Griffiths

et al. 2019

Soil Use and Management

View full text Add to dashboard Cite

Agricultural soils are important sources of greenhouse gases (GHGs). Soil properties and environmental factors have complex interactions which influence the dynamics of these GHG fluxes. Four arable and five grassland soils which represent the range of soil textures and climatic conditions of the main agricultural areas in the UK were incubated at two different moisture contents (50 or 80% water holding capacity) and with or without inorganic fertiliser application (70 kg N ha−1 ammonium nitrate) over 22 days. Emissions of N2O, CO2 and CH4 were measured twice per week by headspace gas sampling, and cumulative fluxes were calculated. Multiple regression modelling was carried out to determine which factors (soil mineral N, organic carbon and total nitrogen contents, C:N ratios, clay contents and pH) that best explained the variation in GHG fluxes. Clay, mineral N and soil C contents were found to be the most important explanatory variables controlling GHG fluxes in this study. However, none of the measured variables explained a significant amount of variation in CO2 fluxes from the arable soils. The results were generally consistent with previously published work. However, N2O emissions from the two Scottish soils were substantially more sensitive to inorganic N fertiliser application at 80% water holding capacity than the other soils, with the N2O emissions being up to 107 times higher than the other studied soils.

show abstract

Managing fertiliser nitrogen to reduce nitrous oxide emissions and emission intensities from a cultivated Cambisol in Scotland

Cited by 31 publications

References 42 publications

Nitrous oxide emissions from fertilised UK arable soils: Fluxes, emission factors and mitigation

Nitrous oxide emissions from fertilised UK arable soils: Fluxes, emission factors and mitigation

Direct Nitrous Oxide Emissions From Tropical And Sub-Tropical Agricultural Systems - A Review And Modelling Of Emission Factors

Isolating the effect of soil properties on agricultural soil greenhouse gas emissions under controlled conditions

Contact Info

Product

Resources

About