University of Natural Resources and Life Sciences, Vienna (BOKU) - Research portal
Gewählte Master / Diploma Thesis:
Nazerke Amangeldy
(2022):
Effect of crop residue management on soil greenhouse gas fluxes in an Austrian long-term experiment.
Master / Diploma Thesis - Institut für Bodenforschung (IBF),
BOKU-Universität für Bodenkultur,
pp 70.
UB BOKU
obvsg
- Abstract:
- Agriculture is the primary source of food and feed production. Greenhouse gas (GHG) emissions from agriculture, forestry, and other land uses contribute to about 25 % of the global anthropogenic GHG emissions. Specifically, agriculture is highly responsible for nitrous oxide (N2O) and methane (CH4) emissions. The management practices play a crucial role in climate change mitigation efforts. Until now, most strategies have tried to increase the amount of soil organic carbon to reduce carbon dioxide (CO2) in the atmosphere. One of these management strategies is the incorporation of crop residues into the soil (instead of removing them); this way has been proved to be an effective way to enhance soil organic carbon stocks through increased soil organic matter inputs. However, little is known about the effects of crop residue management practice on soil CH4 and N2O fluxes, which are essential for the soil GHG balance. In this context, a long-term research site, Rutzendorf, was investigated. It was hypothesized that the incorporation of crop residues leads to an increase in soil N2O fluxes compared to the removal of crop residues due to the larger substrate availability for microbial activities. The soil CO2, CH4 and N2O fluxes were monitored with manual static chambers. After analysis, it was found that crop residue incorporation induced N2O emissions. At the same time, CO2 fluxes had no significant difference between the crop residue incorporation and crop residue removal treatments through the investigated time range. Therefore, less evidence was found to explain the variances in CH4 and CO2 fluxes.
- Beurteilende*r: Zechmeister-Boltenstern Sophie
- 1.Mitwirkender: Diaz-Pines Eugenio