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FORMATION OF N2O ISOTOPES IN AGRICULTURAL SOILS
Abstract
Agricultural activity accounts for two-thirds of the total anthropogenic nitrogen oxide (N2O) emissions worldwide. Most of the N2O emissions from agricultural soils come from the use of inorganic fertilizers and/or manure. As agricultural activity intensifies worldwide, N2O emissions are currently increasing by 0.25% per year. In order to investigate the feedback of soil N2O emissions with changes in environmental conditions, an improved understanding based on the wider use of isotopic tracer methods is needed. The aim of this study is to find out the formation of N2O in agricultural soils, as well as to find out other significant influencing factors that influence the formation of isotopes. To perform the experiment in laboratory conditions, 16 mixed soil samples from different experimental plots were collected. The fields have different types of management, there are both conventional and organic fields. For each experimental plot, two soil samples were created with different moisture regimes, one container with normal moisture regime and the other with over moistened conditions, such soil regimes were chosen to create both moist aerobic and moist anaerobic conditions. Soil samples were also measured for ph. N2O isotope measurements were performed using a Picarro G5131-i instrument. Measurement data were collected, processed and further analyzed. The formation of N2O isotopes in the soil is influenced by several factors, both soil moisture and physical properties of the soil, soil ph. level and microbiological activity in the soil.
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Denk, T. R. A., Mohn, J., Decock, C., Lewicka-Szczebak, D., Harris, E., Butterbach- Bahl, K., Kiese, R., & Wolf, B. (2017). The nitrogen cycle: A review of isotope effects and isotope modeling approaches. Soil Biology and Biochemistry, 105, 121�137. DOI: 10.1016/j.soilbio.2016.11.015
Aryal, B., Gurung, R., Camargo, A. F., Fongaro, G., Treichel, H., Mainali, B., Angove, M. J., Ngo, H. H., Guo, W., & Puadel, S. R. (2022). Nitrous oxide emission in altered nitrogen cycle and implications for climate change. Environmental Pollution, 314, 120272. DOI: 10.1016/J.ENVPOL.2022.120272
Flanagan, B. L., Ehleringer, R. J., & Pataki, E. D. (2005). Stable Isotopes and Biosphere - Atmosphere Interactions: Process and Biological Controls. London: Elsvier Academic Press.
Robinson, D. (2001). ?15N as an integrator of the nitrogen cycle. Trends in Ecology and Evolution, 16(3), 153�162. DOI: 10.1016/S0169-5347(00)02098-X
Croteau, P. L. (2010). Nitrous Oxide and Molecular Nitrogen Isotopic Compositions and Aerosol Optical Properties: Experiments and Observations Relevant to Planetary Atmospheres. DNA Mediated Assembly of Protein Heterodimers on Membrane Surfaces, 67. https://escholarship.org/uc/item/98384265
Sutka, R. L., Ostrom, N. E., Ostrom, P. H., Breznak, J. A., Gandhi, H., Pitt, A. J., & Li, F. (2006). Distinguishing nitrous oxide production from nitrification and denitrification on the basis of isotopomer abundances. Applied and Environmental Microbiology, 72(1), 638�644. DOI: 10.1128/AEM.72.1.638-644.2006
Henault, C., Bourennane, H., Ayzac, A., Ratie, C., Saby, N. P. A., Cohan, J. P., Eglin, T., & Gall, C. Le. (2019). Management of soil pH promotes nitrous oxide reduction and thus mitigates soil emissions of this greenhouse gas. Scientific Reports, 9(1), 1�12. DOI: 10.1038/s41598-019-56694-3
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