Floating rice-culture system for nutrient remediation and feed production in a eutrophic lake. (1st December 2017)

• Record Type: Journal Article
• Authors: Srivastava, Ankita; Chun, Seong-Jun; Ko, So-Ra; Kim, Junhwan; Ahn, Chi-Yong; Oh, Hee-Mock
• Is Part Of: Journal of environmental management. Volume 203:Part 1(2017)
• Page Start: 342
• Page End: 348
• Publication Date: 2017-12-01
• Subjects: Floating culture system -- Rice -- Phytoremediation -- Microcystin -- Bloom control; Environmental policy -- Periodicals; Environmental management -- Periodicals; Environment -- Periodicals; Ecology -- Periodicals; 363.705
• DOI: 10.1016/j.jenvman.2017.08.006
• Languages: English
• ISSNs: 0301-4797

Abstract

Abstract: The increased inputs of nutrients have been demonstrated to be a major contributing factor to the eutrophication of lakes and reservoirs which can lead to the production of harmful algal/cyanobacterial blooms and deleteriously affect the aesthetics of water-bodies. Floating plant-culture systems have been widely used for the ecological remediation of eutrophic water in a cost-effective manner. We investigated the applicability of Korean japonica rice variety 'Nampyeong' in a floating-culture system in a eutrophic lake for nutrient uptake and biomass production. Chemical and organic compound compositions were analyzed two times during the growth stages of the rice plant: 98 DAT (days after transplanting) and 165 DAT. Total nitrogen and phosphorus contributed around 1.36 and 0.15 (% dry weight), respectively, in rice plant components at 165 DAT. Crude protein, lipids, fiber and ash were 4.35, 1.91, 23.66 and 5.55 (% dry weight), respectively. In addition, microcystin levels in the rice plant components ranged from 0.0008 to 0.002 μg/g and did not exceed the recommended tolerable limits. These results suggested that the developed floating rice-culture system showed a good potential as a holistic management approach in terms of nutrient reduction, rice production for further use as feed and for bloom control. Graphical abstract: Highlights: Floating rice-culture system assimilated nutrients effectively. Microcystin content in rice plants did not exceed the recommended tolerable limits. Nutrient- and organic compound-rich rice biomass can be a resource for animal feed. The developed floating rice-culture system is environmentally sustainable.