Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| DOI | 10.1016/S0038-0717(99)00151-0 |
| Title (Primary) | Different pathways of formation of N2O, N2 and NO in black earth soil |
| Author | Wolf, I.; Russow, R. |
| Source Titel | Soil Biology & Biochemistry |
| Year | 2000 |
| Department | BOPHY; BOFO |
| Volume | 32 |
| Page From | 229 |
| Page To | 239 |
| Language | englisch |
| Abstract | The use of (15)N tracer provides a suitable technique to investigate the processes of N transformation in soils and the origin of the environmentally relevant gaseous N compounds N(2)O and NO from nitrification and denitrification. incubation experiments with black earth soil under two different water contents are presented here. Nitrification and denitrification proceeded simultaneously, but the importance of these two microbial processes shifted depending on the water content of the soil. Under water-unsaturated conditions the microbial oxidation of NH(4)(+) to NO(3)(-) predominated, but a reduction of NO(3)(-) also occurred. The emission of NO exceeded the emission of N(2)O by a factor of up to 20 at the beginning of the experiments. Under water-saturated conditions denitrification was the dominant process of N transformation in the soil. However, nitrification also occurred to a considerable extent. The emission of N(2)O was greater than under unsaturated conditions. The formation of NO could hardly be observed. N loss by molecular nitrogen from denitrification could be detected under saturated conditions. The N loss amounted to 60% of NO(3)(-) and thereby the cumulative N ratio of N(2) to N(2)O was 3. Under either unsaturated or saturated conditions NO arose from NO(2)(-) or during the microbial oxidation of NH(4)(+) to NO(2)(-). However, N(2)O mainly formed from denitrification under both conditions. Furthermore, NO could not be observed as a precursor of N(2)O and the free NO(2)(-) could not be detected as a common N pool for the formation of N(2)O and NO. High emissions of NO could be a problem for the black earth soil in the semi-arid climate in central Germany, if there are large amounts of NH(4)(+) in the soil after fertilisation. |
| Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=7798 |
| Wolf, I., Russow, R. (2000): Different pathways of formation of N2O, N2 and NO in black earth soil Soil Biol. Biochem. 32 , 229 - 239 10.1016/S0038-0717(99)00151-0 |
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