标题：Nitrogen transformations in aquaponic systems: A review
作者：Wongkiew, Sumeth; Hu, Zhen; Chandran, Kartik; Lee, Jae Woo; Khanal, Samir Kumar
作者机构：[Wongkiew, Sumeth; Khanal, Samir Kumar] Univ Hawaii Manoa, Dept Mol Biosci & Bioengn, 1955 East West Rd, Honolulu, HI 96822 USA.; [Hu, Zhen] Shandon 更多
通讯作者：Khanal, Samir Kumar
通讯作者地址：[Khanal, SK]Univ Hawaii Manoa, Dept Mol Biosci & Bioengn, 1955 East West Rd, Honolulu, HI 96822 USA.
关键词：Aquaponic system; Aquaculture; Hydroponic system; Nitrogen; transformation; Resource recovery
摘要：In recent years, aquaponic systems have gained significant popularity as soilless agriculture systems for organic fruits and vegetables production with concomitant remediation of aquaculture effluent. Aquaponics is a potential sustainable food production system that integrates aquaculture with hydroponics in which nitrogen-rich effluent from the fish production is utilized for plant growth. Because nitrogen is one of the most important inputs in an aquaponic system, it is critical to investigate the nitrogen transformations in the system for enhanced recovery of resources. Since studies on nitrogen transformations and nitrogen utilization efficiency (NUE) in aquaponic systems have been very limited, this review critically examines the important fates of nitrogen from input to outputs (e.g., ammonia nitrogen generation, nitrification, nitrate assimilation and nitrogen loss) to improve NUE in aquaponic systems. Various factors affecting the nitrogen transformations are also discussed. Furthermore, an example of nitrogen imbalance between nitrate uptake and nitrate generation rates in an aquaponic system was demonstrated. This review aims to advance our current understanding of nitrogen transformations and outlines future research needs in aquaponic systems, a sustainable model for efficient water and nutrient managements, and food production. (C) 2017 Elsevier B.V. All rights reserved.