Kan kväve bevaras i dräneringsvatten från åkermark som lagras i dammar? : ett laboratorieförsök
The aim of this thesis was to examine if it is possible to keep nitrogen in the form of nitrate (NO3 -) in ponds from one season to another by keeping a high concentration of oxygen in the pond water. This hypothesis was tested by doing a lab experiment where two systems were compared according to n...
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| Formato: | H1 |
| Lenguaje: | sueco Inglés |
| Publicado: |
SLU/Dept. of Soil and Environment
2009
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| Materias: |
| Sumario: | The aim of this thesis was to examine if it is possible to keep nitrogen in the form of nitrate
(NO3
-) in ponds from one season to another by keeping a high concentration of oxygen in the
pond water. This hypothesis was tested by doing a lab experiment where two systems were
compared according to nitrate concentration. One system had high concentration of oxygen in
the water and one had low concentration of oxygen. Before the main experiment was
conducted I did a pilot study to test the system setup and included parameters. The result from
this study and the main study did not show the same result. In both studies the nitrate
concentration decreased in the beginning of the experimental period. In the main study the
concentration of nitrate remained close to zero. While in the pilot study the nitrate
concentration increased back up close to the starting level in the system with high oxygen
concentration. From this result it is not possible to come to any conclusions regarding the
influence of oxygen concentration on nitrate concentration. One possible reason why the two
experiments showed different results is that the microbial activity was different in the two
systems. |
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