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Wiström, Dennis, 2009. Kan kväve bevaras i dräneringsvatten från åkermark som lagras i dammar? : ett laboratorieförsök. Second cycle, A1E. Uppsala: SLU, Dept. of Soil and Environment

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Abstract

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.

Main title:Kan kväve bevaras i dräneringsvatten från åkermark som lagras i dammar?
Subtitle:ett laboratorieförsök
Authors:Wiström, Dennis
Supervisor:Wesström, Ingrid and Pell, Mikael
Examiner:Mårtensson, Anna
Series:Examensarbeten (Institutionen för mark och miljö, SLU)
Volume/Sequential designation:2009:03
Year of Publication:2009
Level and depth descriptor:Second cycle, A1E
Student's programme affiliation:1010A Agriculture Programme (admitted before July 1, 2007) 270 HEC
Department:(NL, NJ) > Dept. of Soil and Environment
(S) > Dept. of Soil and Environment
Keywords:Kväve, nitrat, denitrifikation, vatten, övergödning, växtnäring
URN:NBN:urn:nbn:se:slu:epsilon-8-413
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-8-413
Subjects:Agricultural engineering
Chemistry
Water resources and management
Language:Swedish
Deposited On:22 Jan 2010 15:07
Metadata Last Modified:20 Apr 2012 14:10

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