Chin J Plant Ecol ›› 2007, Vol. 31 ›› Issue (3): 490-496.DOI: 10.17521/cjpe.2007.0061
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XIAO Yue-E1, CHEN Kai-Ning2, DAI Xin-Bin1, XU Xiao-Ming1,*()
Received:
2006-03-24
Accepted:
2006-07-31
Online:
2007-03-24
Published:
2007-05-30
Contact:
XU Xiao-Ming
XIAO Yue-E, CHEN Kai-Ning, DAI Xin-Bin, XU Xiao-Ming. DISSOLVED INORGANIC CARBON UPTAKE IN TWO SUBMERGED MACROPHYTES FROM TAIHU LAKE, CHINA[J]. Chin J Plant Ecol, 2007, 31(3): 490-496.
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URL: https://www.plant-ecology.com/EN/10.17521/cjpe.2007.0061
碱度 Alkalinity (μmol·L-1) | [CT] (mmol·L-1) | [CO2] (μmol·L-1) | 终点pH值 pH values | [CT]/Alk | |
---|---|---|---|---|---|
马来眼子菜 Potamogeton malaianus | 1 200 | 0.832±0.008 | 0.079±0.003 | 10.07±0.01 | 0.693±0.048* |
1 600 | 0.933±0.005 | 0.085±0.006 | 10.15±0.05* | 0.583±0.032* | |
2 000 | 0.906±0.006 | 0.066±0.003 | 10.22±0.03* | 0.453±0.026 | |
菹草 P. malaianus | 1 200 | 0.935±0.007 | 0.210±0.071* | 9.86±0.03 | 0.779±0.034 |
1 600 | 0.983±0.005* | 0.127±0.005 | 9.93±0.02 | 0.614±0.005 | |
2 000 | 0.938±0.007* | 0.119±0.065 | 10.02±0.04 | 0.469±0.025 |
Table 1 The pH values, [CO2], [CT] and [CT]/Alk quotients reached in pH drift experiments in two submerged macropytes at three alkalinity
碱度 Alkalinity (μmol·L-1) | [CT] (mmol·L-1) | [CO2] (μmol·L-1) | 终点pH值 pH values | [CT]/Alk | |
---|---|---|---|---|---|
马来眼子菜 Potamogeton malaianus | 1 200 | 0.832±0.008 | 0.079±0.003 | 10.07±0.01 | 0.693±0.048* |
1 600 | 0.933±0.005 | 0.085±0.006 | 10.15±0.05* | 0.583±0.032* | |
2 000 | 0.906±0.006 | 0.066±0.003 | 10.22±0.03* | 0.453±0.026 | |
菹草 P. malaianus | 1 200 | 0.935±0.007 | 0.210±0.071* | 9.86±0.03 | 0.779±0.034 |
1 600 | 0.983±0.005* | 0.127±0.005 | 9.93±0.02 | 0.614±0.005 | |
2 000 | 0.938±0.007* | 0.119±0.065 | 10.02±0.04 | 0.469±0.025 |
Fig.1 Photosynthetic rates-pH curves of two submerged macrophytes in three different alkalinities Real lines and dotted lines indicated photosynthetic rates-pH curve of Potamogeton malaianus and P. cripus respectively, and above right figures are all enlarged when pH values were from 8.0 to 10.5
Fig.3 Photosynthetic rates-CO2 curves of two submerged macrophytes Right figure indicated the photosynthetic rates-CO2 curve when the concentration CO2 were lower than 200 μmol·L-1 with R2 (Potamogeton malaianus)=0.928 and R2 (P. cripus)=0.899
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