SOD is commonly determined by different methods: sediment cores, in situ tubes,
benthic chamber, whole pond budget calculations and calculations based upon oxygen
profiles in the water sediment interface (Meijer and Avnimelech, 1999). The published
SOD data are quite variable (0.01–5.3 g O2 m 1 h 1), affected possibly by both system
characteristics and measurement technology. For example, Suplee and Cotner (1996) found
an increase in the SOD during a shrimp culture season in an inland brackish water shrimp
operation. The SOD increased from an average of 0.06 g O2 m 2 h 1 in week 3 to 0.24 g
O2 m 2 h 1 at the end-of-season with a maximum SOD of 0.33 g O2 m 2 h 1. However,
most of the published data reported here fall in the range of 0.1–0.3 g O2 m 2 h 1, i.e.,
2.4–4.8 gO2m 2 day 1, an appreciable flux as compared to the oxygen storage in the
water column or to oxygen demand of shrimp. SOD consisted of more than 50% of the total
shrimp pond oxygen demand at the end of the growing season (Ellis, 1992).
SOD is commonly determined by different methods: sediment cores, in situ tubes,benthic chamber, whole pond budget calculations and calculations based upon oxygenprofiles in the water sediment interface (Meijer and Avnimelech, 1999). The publishedSOD data are quite variable (0.01–5.3 g O2 m 1 h 1), affected possibly by both systemcharacteristics and measurement technology. For example, Suplee and Cotner (1996) foundan increase in the SOD during a shrimp culture season in an inland brackish water shrimpoperation. The SOD increased from an average of 0.06 g O2 m 2 h 1 in week 3 to 0.24 gO2 m 2 h 1 at the end-of-season with a maximum SOD of 0.33 g O2 m 2 h 1. However,most of the published data reported here fall in the range of 0.1–0.3 g O2 m 2 h 1, i.e.,2.4–4.8 gO2m 2 day 1, an appreciable flux as compared to the oxygen storage in thewater column or to oxygen demand of shrimp. SOD consisted of more than 50% of the totalshrimp pond oxygen demand at the end of the growing season (Ellis, 1992).
การแปล กรุณารอสักครู่..
