Naslov
Is it possible to measure nitrogen oxides soil emission combining passive samplers and static chambers method?

Autori
Zgorelec, Željka ; Pehnec, Gordana ; Kolman, Mateja ; Galić, Marija ; Mesić, Milan

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Https://eurosoil-congress.com/ / ECSSS, The European Confederation of Soil Science Societies - Online, 2021, PO086-PO086

Skup
Eurosoil 2021: Sustainable Management of Soil Functions as a Basis to Avoid, Halt, and Reverse Land Degradation

Mjesto i datum
Ženeva, Švicarska, 23.08.2021. - 27.08.2021

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
NO2 flux, triticale vegetation, mineral nitrogen fertilization, Croatia

Sažetak
Knowledge and understanding of carbon and nitrogen biogeochemical cycles in agroecosystems are crucial for a global sustainable management and development. Nitrogen and carbon forms and compounds cycle between pedosphere, hydrosphere and atmosphere. This includes a very wide range of complex reactions which are influenced by many factors. From abiotic, like temperature and sunlight, through biotic (microorganisms) up to anthropogenic, including different agricultural practices (fertilization, tillage, drainage). Nitrogen oxides (NxOy) ammonia (NH3), carbon oxide (CO2) and methane (CH4) emissions from the agricultural sector contribute with more than 10 % in total GHGs emissions. Some of them are primary pollutants (NOx, NH3) or directly affect the greenhouse effect (N2O, CH4, CO2) and some of them contribute in producing secondary pollutants (NOx, NH3) and GHG like O3 or N2O. The methods used for air quality (NxOy) measurement are assigned to 4 categories: (1) passive sampler methods ; (2) active methods ; (3) automatic methods and (4) remote sensing methods. All of them have advantages and disadvantages. This research, which was conducted in a conventional agroecosystem under triticale vegetation, in a field experiment in Croatia, was based on measurement of nitrogen oxide emissions, by using a method with passive samplers and static chambers which we have developed. The aim of the study was to determine the suitability of the selected method for N-NO2 concentration measurement. It was presumed that, if measured concentration was higher than the limit of detection (LOD), it was possible to determine the potential impact of mineral fertilization on the N-NO2 emission (two treatments with 0 and 300 kg N/ha). Also, the intention was to compare N-NO2 emission between two sets of measurements in phenophases (tillering and jointing) of triticale. The research had shown that the used method was suitable for N-NO2 concentration measurement (measured concentrations were above LOD). Measured daily values of N-NO2 emission ranged from 1.66 to 7.18 mg/ha per day, depending on phenophase and treatment. Statistically significant differences in N-NO2 emission between two monitored treatments (300 kg N and 0 kg N) were not observed, as well as between two investigated phenophases. Soil temperature in March 2014 (22.3 °C) was significantly higher than in April 2014 (10.9 °C). Average cumulative annual flux was 1.15 g/ha per year and 1.55 g/ha per year, respectively, depending on the treatment.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Interdisciplinarne prirodne znanosti, Poljoprivreda (agronomija), Interdisciplinarne biotehničke znanosti

Napomena
Cijeli rad moguće je pročitati na:

https://doi.org/10.15255/KUI.2020.057

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