Impact of different chloride salts and their concentrations on nitrification and trace gas emissions from a sandy soil under a controlled environment

Guo, Yafei; Becker‐Fazekas, Stefan; Mühling, Karl H.

doi:10.1111/sum.12713

Cited by 10 publications

(3 citation statements)

References 67 publications

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“…The pots were first closed by adding lids, gases were mixed by collecting and injecting the gas in and out of the pots a few times with a syringe, and then samples were collected from the headspace at 0, 30, and 60 min after lid closure (Guo et al, 2021b). A 20-ml syringe and hypodermic needle was used to collect the gas samples and inject them into pre-evacuated 12-ml glass headspace exetainer vials fitted with a chloro-butyl rubber septum (Guo et al, 2022a). Gas sampling was carried out between 09:00 and 10:00 a.m.…”

Section: Collection and Measurement Of Ghgsmentioning

confidence: 99%

Prolonged Flooding followed by drying increase greenhouse gas emissions differently from soils under grassland and arable land uses

Guo¹,

Saiz²,

Radu³

et al. 2023

Preprint

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Abstract &#160;&#160;&#160; Under the predicted climate change scenarios, heavy precipitation could result in prolonged flooding (PF) and flooding-drying (FD) of soils in agriculture. The influence of PF and FD on soil greenhouse gas fluxes and nitrogen (N) dynamics of arable and grassland soils, which are the dominant land use types in UK soil, is still unclear. Two months of soil incubation experiments were conducted to find out the impact of PF and FD on soil nitrogen dynamics and greenhouse gas fluxes from arable and grassland soil. The result showed the developed ion selective electrodes (ISE) sensor was working to measure NH4+ in the first 5 days of real-life application under both grassland and arable soil. There were less N2O-N emissions in grassland and arable soil when soil moisture was higher than 100% water-holding capacity (WHC). Arable soil had more N2O-N emissions when soil moisture was higher than 100% WHC compared to grassland soil due to a low pH. Grassland soil had more N2O-N emissions when soil moisture was lower than 100% WHC compare to arable soil due to a high carbon and nitrogen source. When soil moisture was greater than 100% WHC, the available NO3--N in the soil controlled N2O-N emissions of grassland more effectively. The N2O-N emissions of grassland soil were more controlled by soil stable NH4+-N and NO3--N when soil moisture was lower than 100% WHC. The emissions of N2O-N and CO2-C were increased with the time of FD. FD significantly increased N2O-N, CO2-C, and CH4-C emissions in grassland soil compared to arable soil by 0.93, 2.15, and 37.29 times, respectively. Converting arable land use to grassland could increase the greenhouse gas (GHG) emissions under climate change (heavy rain). Further research needs to be done to find out how to reduce the GHG emissions under climate change after transfer arable to grassland.

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Section: Collection and Measurement Of Ghgsmentioning

confidence: 99%

Prolonged Flooding followed by drying increase greenhouse gas emissions differently from soils under grassland and arable land uses

Guo¹,

Saiz²,

Radu³

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Chloride salt may also be used to reduce GHG emissions; for example, 1 g/kg of MgCl 2 application was found to reduce CO 2 emissions by 72% and N 2 O emissions by 19%. However, the effect may highly dependent upon dosage, as a lower dosage (i.e., 0.5 g/kg of MgCl 2 application) was found to increase N 2 O emissions (Guo et al, 2021). The effects of the same mitigation strategies (e.g., biochar amendment) may vary depending on landscape, soil texture, etc.…”

Section: Gas Emissions From Agricultural Soilmentioning

confidence: 99%

Expediting climate‐smart soils management

Hou

2021

Soil Use and Management

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The 26th annual summit of the United Nations climate change conference (COP26) was held in Glasgow, UK, between 31 October and 13 November 2021. The summit achieved significant progress towards stronger and more concerted international efforts in combating climate change. Among others, the second most important greenhouse gas, methane, stepped into the centre of the stage. Over 100 countries have joined the Global Methane Pledge, committing to reduce methane emissions by at least 30% from 2020 to 2030 (EU, 2021). China and the United States agreed to enhance their collaboration on climate action in the 2020s by giving an unexpected joint declaration (USDOS, 2021). Moreover, the international community has for the first time agreed to reduce coal, the worst fossil fuel, accounting for the largest amount of CO 2 emissions, and developed countries are agreeing to help developing countries on adaptation efforts (Rincon, 2021). These advances are encouraging for the international community, especially after years of split and setback after the 2015 Paris agreement during COP21 with, for example, the withdrawal from the Paris agreement by the Trump administration (McGrath, 2020).

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“…An electron capture detector (ECD), adjusted to a temperature of 300 °C with N 2 as a carrier gas, was used to measure N 2 O concentration. A thermal conductivity detector (TCD), adjusted to a temperature of 250 °C with He as a carrier gas, was used to measure CO 2 concentration (Guo et al, 2021a). For each gas measurement, the gas chromatograph was calibrated with respective certified gas standards.…”

Section: Collection and Measurement Of N 2 O And Comentioning

confidence: 99%

Comparative Effectiveness of Biogas Residue Acidification and Nitrification Inhibitors in Mitigating CO2 and N2O Emissions from Biogas Residue-Amended Soils

Guo

Anjum

Khan

et al. 2021

Water Air Soil Pollut

Self Cite

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Owing to their high carbon and nitrogen contents, biogas residues may lead to higher carbon dioxide (CO2) and nitrous oxide (N2O) emissions from soils. Acidification of biogas slurry and application of nitrification inhibitors (NIs) could mitigate the emission of these gases. An incubation experiment was therefore carried out to investigate the effect of NIs, DMPP (3, 4-dimethylpyrazole phosphate), and PIADIN (active ingredients: 3.00–3.25% 1,2,4-triazole and 1.50–1.65% 3-methylpyrazole), on CO2 and N2O emissions from soils fertilized with biogas residues and acidified biogas residues. Biogas residues produced higher ammonium-nitrogen (NH4+-N) and nitrate-nitrogen (NO3−-N) concentrations in soils which resulted in higher emissions of CO2-C and N2O-N than that from acidified biogas residues. Both DMPP and PIADIN significantly decreased the emissions of CO2-C (8.1–55.8%) and N2O-N (87–98%) and maintained lower NH4+-N and NO3−-N concentrations when compared to control (without nitrification inhibitors). However, the DMPP had a higher reduction capability for CO2-C emissions than PIADIN in acidified biogas residue applied soil. In conclusion, the acidification of biogas residues and application of NIs are effect in reducing gaseous emission from biogas residue fertilized soils and thus could improve the fertilizer effectiveness of the residues.

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Impact of different chloride salts and their concentrations on nitrification and trace gas emissions from a sandy soil under a controlled environment

Cited by 10 publications

References 67 publications

Prolonged Flooding followed by drying increase greenhouse gas emissions differently from soils under grassland and arable land uses

Prolonged Flooding followed by drying increase greenhouse gas emissions differently from soils under grassland and arable land uses

Expediting climate‐smart soils management

Comparative Effectiveness of Biogas Residue Acidification and Nitrification Inhibitors in Mitigating CO2 and N2O Emissions from Biogas Residue-Amended Soils

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