Effects of temperature on nitrous oxide (N2O) emission from intensive aquaculture system

被引：50

作者：

Paudel, Shukra Raj ^{[1
]}

Choi, Ohkyung ^{[2
]}

Khanal, Samir Kumar ^{[3
]}

Chandran, Kartik ^{[4
]}

Kim, Sungpyo ^{[1
,2
]}

Lee, Jae Woo ^{[1
,2
]}

机构：

[1] Korea Univ, Coll Sci & Technol, Dept Environm Engn, Sejong 339700, South Korea

[2] Korea Univ, Program Environm Technol & Policy, Sejong 339700, South Korea

[3] Univ Hawaii Manoa, Dept Mol Biosci & Bioengn, Honolulu, HI 96822 USA

[4] Columbia Univ, Dept Earth & Environm Engn, New York, NY 10027 USA

来源：

SCIENCE OF THE TOTAL ENVIRONMENT | 2015年 / 518卷

基金：

新加坡国家研究基金会;

关键词：

Nitrous oxide (N2O); Aquaculture system; Nitrification; Denitrification; Greenhouse gas (GHG); Temperature; WASTE-WATER; FEED-UTILIZATION; NITRIC-OXIDE; GROWTH; FISH; DENITRIFICATION; NITRIFICATION; REMOVAL; AMMONIA; TURBOT;

D O I：

10.1016/j.scitotenv.2015.02.076

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This study examines the effects of temperature on nitrous oxide (N2O) emissions in a bench-scale intensive aquaculture system rearing Koi fish. The water temperature varied from 15 to 24 degrees C at interval of 3 degrees C. Both volumetric and specific rate for nitrification and denitrification declined as the temperature decreased. The concentrations of ammonia and nitrite, however, were lower than the inhibitory level for Koi fish regardless of temperature. The effects of temperature on N2O emissions were significant, with the emission rate and emission factor increasing from 1.11 to 1.82 mg N2O-N/d and 0.49 to 0.94 mg N2O-N/kg fish as the temperature decreased from 24 to 15 degrees C. A global map of N2O emission from aquaculture was established by using the N2O emission factor depending on temperature. This study demonstrates that N2O emission from aquaculture is strongly dependent on regional water temperatures as well as on fish production. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：16 / 23

页数：8

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