Nitrogen transformations in intensive aquaculture system and its implication to climate change through nitrous oxide emission

Hu, Zhen, Lee, Jae Woo, Chandran, Kartik, Kim, Sungpyo, Sharma, Keshab, Brotto, Ariane Coelho and Khanal, Samir Kumar (2013) Nitrogen transformations in intensive aquaculture system and its implication to climate change through nitrous oxide emission. Bioresource Technology, 130 314-320. doi:10.1016/j.biortech.2012.12.033


Author Hu, Zhen
Lee, Jae Woo
Chandran, Kartik
Kim, Sungpyo
Sharma, Keshab
Brotto, Ariane Coelho
Khanal, Samir Kumar
Title Nitrogen transformations in intensive aquaculture system and its implication to climate change through nitrous oxide emission
Journal name Bioresource Technology   Check publisher's open access policy
ISSN 0960-8524
1873-2976
Publication date 2013-02
Year available 2012
Sub-type Article (original research)
DOI 10.1016/j.biortech.2012.12.033
Volume 130
Start page 314
End page 320
Total pages 7
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2014
Language eng
Formatted abstract
The rapid development of aquaculture could result in significant environmental concerns such as eutrophication and climate change. However, to date, very few studies have been conducted to investigate nitrogen transformations in aquaculture systems; and specifically the emission of nitrous oxide (N2O), which is an important greenhouse gas and ozone-depleting substance. In this study, nitrogen transformations in intensive laboratory-scale Chinese catfish (Clarias fuscus) aquaculture systems were investigated by identifying and quantifying N2O emissions. Results indicated that about 1.3% of the nitrogen input was emitted as N2O gas. Dissolved oxygen (DO) concentrations and feeding rates had significant effects on N2O emissions. Higher N2O emissions were obtained in aquaculture systems with lower DO concentrations and higher feeding rates. Both nitrification and denitrification appeared to be responsible for the emissions of N2O. Key factors which correlated with the N2O emission rate in aquaculture systems were NO2-, DO and total ammonia nitrogen concentrations.
Keyword Nitrous oxide
Biological nitrogen transformations
Greenhouse gas
Intensive aquaculture system
Climate change
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online 27 December 2012.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
Advanced Water Management Centre Publications
 
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