| Hu Minghui,Yang Yiping,Xu Chunling,P. J. Harrison. 1990. Phosphate limitation of phytoplankton growth in the Changjiang Estuary. Acta Oceanologica Sinica, (3):405－411 |
| Phosphate limitation of phytoplankton growth in the Changjiang Estuary |
| Phosphate limitation of phytoplankton growth in the Changjiang Estuary |
| Received:July 10, 1989 Revised:November 10, 1989 |
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| 基金项目:This project is financed by the National Nature Science Foundation of China. |
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| Abstract: |
| Laboratory experiments of bioassay with Pltaeodaetytum tricornutum, Chatoceros didymus, Chaetoreros calcitraus and Heterogtoea sp.sampled from the Changjiang Estuary in spring and summer, 1986, indicated that both N and P limit phytoplankton growth in the medium with N:P ranged between 8-30, and N limits phytoplankton production in the medium with N:P<8, while P is the limitary nutrient in the N:P>30.Generally, N:P in the Changjiang Estuary waters is 2 times higher than Redfield ratio.The bioassay experiments with high N:P water samples collected from Changjiang Estuary show that phytoplankton production is limited by P.Phytopiankton appears to give priority to the uptake of P at all periods of time.And the optimum N:P for phytoplankton growth is determined to be 18. |
| 中文摘要: |
| Laboratory experiments of bioassay with Pltaeodaetytum tricornutum, Chatoceros didymus, Chaetoreros calcitraus and Heterogtoea sp.sampled from the Changjiang Estuary in spring and summer, 1986, indicated that both N and P limit phytoplankton growth in the medium with N:P ranged between 8-30, and N limits phytoplankton production in the medium with N:P<8, while P is the limitary nutrient in the N:P>30.Generally, N:P in the Changjiang Estuary waters is 2 times higher than Redfield ratio.The bioassay experiments with high N:P water samples collected from Changjiang Estuary show that phytoplankton production is limited by P.Phytopiankton appears to give priority to the uptake of P at all periods of time.And the optimum N:P for phytoplankton growth is determined to be 18. |
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