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| Effects of Nitrogen Nutrition on Diesel Fuel Removal by Rhizosphere of Two Mangrove Seedlings |
| Received:April 17, 2015 |
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| KeyWord:Kandelia candle;Aegiceras corniculatum;rhizosphere;diesel fuel removal;nitrogen nutrition |
| Author Name | Affiliation | E-mail | | ZHAO Bei-bei | South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences/Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture, Guangzhou 510300, China
College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China | | | LIU Yong | South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences/Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture, Guangzhou 510300, China | | | LI Chun-hou | South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences/Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture, Guangzhou 510300, China | scslch@vip.163.com | | XU Shan-nan | South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences/Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture, Guangzhou 510300, China | | | QI Zhan-hui | South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences/Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture, Guangzhou 510300, China | | | XIAO Ya-yuan | South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences/Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture, Guangzhou 510300, China | |
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| Abstract: |
| Oil spill pollution has drawn more and more attention in recent years because the pollutant could enter into the coastal ecosystems and pose a potential risk to human health via food chain. Constructed mangrove wetland has been suggested as a high efficiency in situ method to remedy some pollutants, such as sewage, heavy metal, PAHs, etc. However, environmental factors may affect pollutant removal efficiency of constructed mangrove wetland. A sand-culture experiment was carried out for four months to investigate the effect of nitrogen nutrition on diesel fuel removal and growth of two mangrove seedlings, Kandelia candle and Aegiceras corniculatum. Results showed that the growth of both K. candle and A. corniculatum was significantly inhibited by diesel fuel, with more inhibition at higher concentrations. However, increasing nitrogen nutrition promoted the tolerance of two mangrove seedlings to high concentrations of diesel fuel for four months. The removal rate of diesel fuel ranged from 72% to 80% in the non-rhizosphere, but was over 90% in the rhizosphere of both mangrove seedlings. Moreover, increasing nitrogen supplies improved the removal efficiency of diesel fuel in the rhizosphere areas of two mangrove seedlings. |
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