N2O Release During Cultivation of Energy Crops
| dc.contributor.author | Hellebrand, Hans Jürgen | |
| dc.contributor.author | Schulz, Volkhard | |
| dc.contributor.author | Kern, Jürgen | |
| dc.contributor.author | Kavdir, Yasemin | |
| dc.date | 2014-10-08 | en |
| dc.date.accessioned | 2024-05-22T13:42:41Z | |
| dc.date.available | 2024-05-22T13:42:41Z | |
| dc.date.issued | 2005 | en |
| dc.description.abstract | The emission of nitrous oxide (N 2 O) from the soil has a significant impact on the greenhouse gas balance of en- ergy crops. Factors like soil type, temperature, precipitation, tillage practice (annual or perennial crop), and level of fertilisation can affect the source strength of N2 O emissions and fertiliser-induced N2 O emissions. The N2 O-fluxes from different sites of an experimental field were measured using the flux chamber method in combi- nation with gas chromatography. The sites had three nitrogen fertilisation levels (0 kg N ha-1 y-1, 75 kg N ha-1 y-1, and 150 kg N ha-1 y-1). The soil nitrate concentration was determined by ion chromatography. The mean of an- nually accumulated emission of N2 O-N from all measuring spots was 1.4 kg N2 O-N ha-1 y-1. The accumulated emissions varied between 0.5 kg N2 O-N ha-1 y-1 to 3.8 kg N2 O-N ha-1 y-1 depending on fertilisation level, crop variety, and year. The mean annually fertiliser-induced N2 O-N emission from all fertilised sites was 0.7 % for the period from 1999 to 2004. This mean nitrogen conversion factor (ratio of N2 O-N emission to fertiliser-N in- put) ranged from 0.2 to 1.6 %. The mean conversion factor for perennial crops was lower (0.4 % for both fer- tilisation levels of 75 and 150 kg N ha-1 y-1) than that for annual crops (0.7 % for 75 kg N ha-1 y-1 and 0.9 % for 150 kg N ha-1 y-1). Several enhanced N2 O emission spots with maxima of up to 1400 μg N2O m-2 h-1 were ob- served at sites with the higher level of nitrogen fertilisation, lasting for several weeks, in the course of the meas- urements. These local peak emissions were mainly responsible for the raise of the nitrogen conversion factor of sites fertilised with 150 kg N ha-1 y-1 compared to sites with fertilisation level of 75 kg N ha-1 y-1. Although N2O emissions doubtless depend on nitrogen fertilisation and tillage, it could be shown that also climate has a strong effect on N2 O emissions. In contrast to a low correlation between N2 O emissions and soil nitrate concentration, N2 O emissions are relatively close correlated to annual precipitation. | en |
| dc.format | application/pdf | en |
| dc.identifier.uri | https://hohpublica.uni-hohenheim.de/handle/123456789/10403 | |
| dc.language.iso | eng | en |
| dc.relation | //440ejournals.uni-hohenheim.de/index.php/ATF/article/view/8157/7952 | en |
| dc.rights.license | copyright | en |
| dc.source | Agrartechnische Forschung; Vol. 11 No. 5 (2005) | en |
| dc.source | 0948-7298 | en |
| dc.title | N2O Release During Cultivation of Energy Crops | |
| dc.type.dini | Article | en |
| dcterms.bibliographicCitation | Agrartechnische Forschung, 11 (2005), 5. ISSN: 0948-7298 | |
| dcterms.bibliographicCitation.issn | 0948-7298 | |
| dcterms.bibliographicCitation.issue | 5 | |
| dcterms.bibliographicCitation.journaltitle | Agrartechnische Forschung | |
| dcterms.bibliographicCitation.volume | 11 | |
| dcterms.bibliographicCitation.zdb | 2829163-3 | |
| local.export.bibtex | @article{Hellebrand2005, url = {https://hohpublica.uni-hohenheim.de/handle/123456789/10403}, author = {Hellebrand, Hans Jürgen and Schulz, Volkhard and Kern, Jürgen et al.}, title = {N2O Release During Cultivation of Energy Crops}, journal = {Agrartechnische Forschung}, year = {2005}, volume = {11}, number = {5}, } | |
| local.export.bibtexAuthor | Hellebrand, Hans Jürgen and Schulz, Volkhard and Kern, Jürgen et al. | |
| local.export.bibtexKey | Hellebrand2005 | |
| local.export.bibtexType | @article | |
| local.faculty.number | 2 | |
| local.institute.number | 440 |
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