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Estimation of nitrogen and phosphorus in effluent from the striped catfish farming sector in the Mekong Delta, Vietnam

De Silva, Sena S., Ingram, Brett A., Nguyen, Phuong T., Bui, Tam M, Gooley, Geoff J. and Turchini, Giovanni M 2010, Estimation of nitrogen and phosphorus in effluent from the striped catfish farming sector in the Mekong Delta, Vietnam, Ambio : a journal of the human environment, vol. 39, no. 7, pp. 504-514.

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Title Estimation of nitrogen and phosphorus in effluent from the striped catfish farming sector in the Mekong Delta, Vietnam
Author(s) De Silva, Sena S.
Ingram, Brett A.
Nguyen, Phuong T.
Bui, Tam M
Gooley, Geoff J.
Turchini, Giovanni M
Journal name Ambio : a journal of the human environment
Volume number 39
Issue number 7
Start page 504
End page 514
Total pages 11
Publisher Springer Netherlands
Place of publication Dordrecht, Netherlands
Publication date 2010-11
ISSN 0044-7447
1654-7209
0301-0325
Keyword(s) Effluent discharge
Mekong Delta
Nutrient mass balance
Nitrogen
Pangasius
Phosphorus
Striped catfish
Tra Catfish
BMPs
Summary In this study an attempt is made to estimate nitrogen and phosphorus discharged to the environment from the striped catfish (Pangasianodon hypophthalmus) farming sector in the Mekong Delta (8°33̕–10°55̕ N, 104°30̕–106°50̕ E), South Vietnam. The sector accounted for 687,000 t production in 2007 and 1,094,879 t in 2008, with over 95% of the produce destined for export to over 100 countries. Commercial and farm-made feeds are used in catfish farming, currently the former being more predominant. Nitrogen discharge levels were similar for commercial feeds (median 46.0 kg/t fish) and farm-made feeds (median 46.8 kg/t fish); whilst, phosphorus discharge levels for commercial feeds (median 14.4 kg/t fish) were considerably lower than for farm-made feeds (median 18.4 kg/t fish). Based on the median nutrient discharge levels for commercial feeds, striped catfish production in the Mekong Delta discharged 31,602 t N and 9,893 t P, and 50,364 t N and 15,766 t P in 2007 and 2008, respectively. However, the amount of nutrients returned directly to the Mekong River may be substantially less than this as a significant proportion of the water used for catfish farming as well as the sludge is diverted to other agricultural farming systems. Striped catfish farming in the Mekong Delta compared favourably with other cultured species, irrespective of the type of feed used, when the total amounts of N and P discharged in the production of a tonne of production was estimated.
Notes Published online: 6 July 2010
Language eng
Field of Research 070401 Aquaculture
Socio Economic Objective 830102 Aquaculture Fin Fish (excl. Tuna)
HERDC Research category C1 Refereed article in a scholarly journal
HERDC collection year 2010
Copyright notice ©2010, Royal Swedish Academy of Sciences
Persistent URL http://hdl.handle.net/10536/DRO/DU:30030677

Document type: Journal Article
Collection: School of Life and Environmental Sciences
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Created: Mon, 18 Oct 2010, 16:02:35 EST by Teresa Treffry