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| Nitrogen uptake kinetics of a diatom and model prediction analysis in different inorganic nitrogen conditions |
| Received:January 27, 2018 |
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| KeyWord:ammonium;nitrate;nitrogen uptake kinetics;ammonium inhibition;model |
| Author Name | Affiliation | E-mail | | SHI Feng | Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China | | | WEI Xiao-xue | Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China | | | FENG Jian-feng | Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China | | | ZHU Lin | Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China | zhulin@nankai.edu.cn |
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| Abstract: |
| To investigate the utilization of inorganic nitrogen in the water by marine phytoplankton and the relationship between nitrogen sources, the growth curve and the nitrogen (ammonium and nitrate) uptake characteristics of Phaeodactylum tricornutum under different nitrogen culture conditions were measured in the laboratory. Moreover, a kinetic model was developed to predict these nitrogen uptake processes. The results showed that there was no significant difference in the growth of P. tricornutum (P>0.05) when reared in the same concentration but different forms of inorganic nitrogen cultures. Moreover, either of the two nitrogen forms could be taken up rapidly by Phaeodactylum tricornutum when they were present as the sole nitrogen form, but in mixed nitrogen cultures, nitrate uptake was clearly inhibited in the presence of ammonium. Additionally, the refined kinetic model can accurately predict the nitrogen uptake process in the tests. |
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