Effects of cattle slurry and nitrification inhibitor application on spatial soil O2 dynamics and N2O production pathways

Nguyen, Quan Van; Wu, Di; Kong, Xianwang; Bol, Roland; Petersen, Søren O.; Jensen, Lars Stoumann; Liu, Shurong; Brüggemann, Nicolas; Glud, Ronnie N.; Larsen, Morten; Bruun, Sander

doi:10.1016/j.soilbio.2017.07.012

Cited by 46 publications

(24 citation statements)

References 70 publications

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“…3g. The modelled declines in O 2g were consistent with results from an incubation of wetted soil amended with cattle slurry by Nguyen et al (2017), in which O 2g declined below one-half of atmospheric concentration within 1 d of slurry application and gradually rose again after 2 d, while no decline occurred in an unamended soil. The period of low O 2s in this incubation study coincided with peak emissions of CO 2 and N 2 O from the amended soil, as was modelled here in Figs.…”

Section: Ni Effects On Barley Silage Yieldssupporting

confidence: 82%

“…The smaller nitrifier biomass modelled with NI was consistent with the findings of Dong et al (2013) that DMPP reduced populations of ammonia oxidizing bacteria in soil incubations. Greater [O 2s ] modelled with NI was consistent with greater [O 2g ] measured in an incubation of wetted soil amended with cattle slurry with DMPP vs. without DMPP by Nguyen et al (2017). Slower nitrifier growth and greater [O 2s ] both contributed to reductions in N 2 O emissions modelled with NI beyond those from the direct effects of I t on nitrification in Eq.…”

Section: Spring Slurry Applicationsupporting

confidence: 71%

“…These O 2 transfers were sustained by concentration gradients from O 2g to O 2s and from O 2s to O 2 at microbial surfaces (O 2m ) so that declines in O 2s (Fig. 3) (Nguyen et al, 2017;Owens et al, 2017). These O 2 deficits were modelled using a K m for O 2m of 10 µM by nitrifiers (Sect.…”

Section: Ni Effects On Barley Silage Yieldsmentioning

confidence: 99%

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Modelling nitrification inhibitor effects on N2O emissions after fall- and spring-applied slurry by reducing nitrifier NH4+ oxidation rate

2020

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Abstract. Reductions in N2O emissions from nitrification inhibitors (NI) are substantial but remain uncertain because measurements of N2O emissions are highly variable and discontinuous. Mathematical modelling may offer an opportunity to estimate these reductions if the processes causing variability in N2O emissions can be accurately simulated. In this study, the effect of NI was simulated with a simple, time-dependent algorithm to slow NH4+ oxidation in the ecosystem model ecosys. Slower nitrification modelled with NI caused increases in soil NH4+ concentrations and reductions in soil NO3- concentrations and in N2O fluxes that were consistent with those measured following fall and spring applications of slurry over 2 years from 2014 to 2016. The model was then used to estimate direct and indirect effects of NI on seasonal and annual emissions. After spring slurry applications, NI reduced N2O emissions modelled and measured during the drier spring of 2015 (35 % and 45 %) less than during the wetter spring of 2016 (53 % and 72 %). After fall slurry applications, NI reduced modelled N2O emissions by 58 % and 56 % during late fall in 2014 and 2015 and by 8 % and 33 % during subsequent spring thaw in 2015 and 2016. Modelled reductions were consistent with those from meta-analyses of other NI studies. Simulated NI activity declined over time so that reductions in N2O emissions modelled with NI at an annual timescale were relatively smaller than those during emission events. These reductions were accompanied by increases in NH3 emissions and reductions in NO3- losses with NI that caused changes in indirect N2O emissions. With further parameter evaluation, the addition of this algorithm for NI to ecosys may allow emission factors for different NI products to be derived from annual N2O emissions modelled under diverse site, soil, land use and weather.

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Section: Ni Effects On Barley Silage Yieldssupporting

confidence: 82%

Section: Spring Slurry Applicationsupporting

confidence: 71%

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Modelling nitrification inhibitor effects on N2O emissions after fall- and spring-applied slurry by reducing nitrifier NH4+ oxidation rate

2020

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“…Baral et al (2016), using 15 N-labelling, also found that denitrification was the main source of N 2 O from surface-applied cattle manure independent of soil water content. A recent study under wet conditions concluded that denitrification was the main N 2 O source in grassland soil following surface application of cattle manure (Van Nguyen et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

Effects of dairy shed effluent dry matter content on ammonia and nitrous oxide emissions from a pasture soil

et al. 2018

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Atmospheric emissions of nitrogen (N) from New Zealand dairy farms are significant but have the potential to be affected by manure management prior to land application. The current work examined whether reducing cattle manure dry matter (DM) from 0.16 high DM (HDM) to 0.06 low DM (LDM), to enhance infiltration and reduce ammonia (NH3) emissions when applied to grassland, would affect nitrous oxide (N2O) emissions. Pasture was cut, simulating grazing, and either amended with HDM (173 kg N/ha) or LDM manure (48 kg N/ha) or left unamended. Ammonia emissions from HDM manure were higher than from LDM manure, as a flux or as a percentage of total ammoniacal nitrogen (TAN, i.e. NH3 + NH4+) applied, due to more TAN being retained near the soil surface and the higher soil surface pH under HDM manure treatment. Cumulative N2O emissions over 37 days from HDM plots were higher than from the control but not from the LDM plots. After 5 days, the daily N2O emission rate was larger from HDM plots than from LDM and control plots. The N2O fluxes from LDM and HDM treatments did not differ, either as a proportion of TAN applied or as a proportion of total-N applied. Increasing DM contributed to reductions in both oxygen (O2) availability and relative gas diffusivity, and thus potentially N2O production. Under the conditions of the current study, lower manure DM content reduced NH3 emissions but did not increase cumulative losses of N2O.

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“…However, the way in which the distribution of O 2 in soil is influenced by the distribution and degradability of the organic matter applied, and in turn how this affects N 2 O production, has not yet been fully investigated. A visualization of soil spatiotemporal O 2 dynamics by planar O 2 optodes has proved useful for enhancing understanding of the processes leading to N 2 O emissions after application of organic materials (Zhu et al, 2014, 2015; Nguyen et al, 2017). Furthermore, N 2 O isotopomer techniques have been used widely to investigate the source of N 2 O production pathways (Toyoda and Yoshida, 1999; Bol et al, 2003b; Sutka et al, 2006; Jinuntuya‐Nortman et al, 2008; Ostrom et al, 2010; Köster et al, 2013; Wu et al, 2017).…”

mentioning

confidence: 99%

Biogas Digester Hydraulic Retention Time Affects Oxygen Consumption Patterns and Greenhouse Gas Emissions after Application of Digestate to Soil

et al. 2017

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Knowledge about environmental impacts associated with the application of anaerobic digestion residue to agricultural land is of interest owing to the rapid proliferation of biogas plants worldwide. However, virtually no information exists concerning how soil-emitted NO is affected by the feedstock hydraulic retention time (HRT) in the biogas digester. Here, the O planar optode technique was used to visualize soil O dynamics following the surface application of digestates of the codigestion of pig slurry and agro-industrial waste. We also used NO isotopomer analysis of soil-emitted NO to determine the NO production pathways, i.e., nitrification or denitrification. Two-dimensional images of soil O indicated that anoxic and hypoxic conditions developed at 2.0- and 1.5-cm soil depth for soil amended with the digestate produced with 15-d (PO15) and 30-d (PO30) retention time, respectively. Total NO emissions were significantly lower for PO15 than PO30 due to the greater expansion of the anoxic zone, which enhanced NO reduction via complete denitrification. However, cumulative CO emissions were not significantly different between PO15 and PO30 for the entire incubation period. During incubation, NO emissions came from both nitrification and denitrification in amended soils. Increasing the HRT of the biogas digester appears to induce significant NO emissions, but it is unlikely to affect the NO production pathways after application to soil.

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Effects of cattle slurry and nitrification inhibitor application on spatial soil O2 dynamics and N2O production pathways

Cited by 46 publications

References 70 publications

Modelling nitrification inhibitor effects on N<sub>2</sub>O emissions after fall- and spring-applied slurry by reducing nitrifier NH<sub>4</sub><sup>+</sup> oxidation rate

Modelling nitrification inhibitor effects on N<sub>2</sub>O emissions after fall- and spring-applied slurry by reducing nitrifier NH<sub>4</sub><sup>+</sup> oxidation rate

Effects of dairy shed effluent dry matter content on ammonia and nitrous oxide emissions from a pasture soil

Biogas Digester Hydraulic Retention Time Affects Oxygen Consumption Patterns and Greenhouse Gas Emissions after Application of Digestate to Soil

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Effects of cattle slurry and nitrification inhibitor application on spatial soil O2 dynamics and N2O production pathways

Cited by 46 publications

References 70 publications

Modelling nitrification inhibitor effects on N&lt;sub&gt;2&lt;/sub&gt;O emissions after fall- and spring-applied slurry by reducing nitrifier NH&lt;sub&gt;4&lt;/sub&gt;&lt;sup&gt;+&lt;/sup&gt; oxidation rate

Modelling nitrification inhibitor effects on N&lt;sub&gt;2&lt;/sub&gt;O emissions after fall- and spring-applied slurry by reducing nitrifier NH&lt;sub&gt;4&lt;/sub&gt;&lt;sup&gt;+&lt;/sup&gt; oxidation rate

Effects of dairy shed effluent dry matter content on ammonia and nitrous oxide emissions from a pasture soil

Biogas Digester Hydraulic Retention Time Affects Oxygen Consumption Patterns and Greenhouse Gas Emissions after Application of Digestate to Soil

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Modelling nitrification inhibitor effects on N<sub>2</sub>O emissions after fall- and spring-applied slurry by reducing nitrifier NH<sub>4</sub><sup>+</sup> oxidation rate

Modelling nitrification inhibitor effects on N<sub>2</sub>O emissions after fall- and spring-applied slurry by reducing nitrifier NH<sub>4</sub><sup>+</sup> oxidation rate