| 摘要: |
| 于1995年3月–1996年1月，通过实验室模拟培养，研究了中肋骨条藻和新月菱形藻对磷酸盐和硝酸盐的吸收速率，以及温度、光照等环境因素对新月菱形藻吸收磷酸盐的影响。结果表明，用Michaelis－Menton方程处理，求得中肋骨条藻和新月菱形藻吸收磷酸盐的半饱和常数分别为0.61μmol/L和0.48μmol/L，吸收硝酸盐的半饱和常数分别为7.8μmol/L和6.0μmol/L。新月菱形藻对磷酸盐的吸收速率较高，而中肋骨条藻对硝酸盐的吸收速率较高。温度和光照影响营养盐吸收速率及有关动力学参数。新月菱形藻吸收磷酸盐的速率和半饱和常数随温度的降低而降低。在1000–3000lX的光照范围内，新月菱形藻对磷酸盐的吸收速率和半饱和常数基本一致；无光时，吸收速率和半饱和常数降低。 |
| 关键词: 浮游植物 营养盐 吸收速率 温度 光照 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助项目，49476286号 |
附件 |
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| A STUDY ON THE UPTAKE RATE OF THE NUTRIENS BY SKELETONEMA COSTATUM AND NITZSCHIA CLOSTERIUM AND THE ENVIRONMENTAL EFFECTS |
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LI Tie, SHI Zhi-li, QIU Chi-bin, WANG Qiao-ling
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College of Chemistry and Chemical Engineering, Ocean University of Qingdao, Qingdao, 266003
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| Abstract: |
| The uptake rates of phosphate and nitrate by Skeletonema costatum and Nitzschia closterium were studied in Mar., 1995–Jan., 1996. The effects of temperature and light on the uptake parameters of phosphate by Nitzschia closterium were also studied in this paper. The data of the experiments were processed using the Michaelis-Menton equation. The half-saturation constants for the uptake of phosphate by Skeletonema costatum and Nitzschia closterium are 0.61 and 0.48 μmol/L, respectively. Those for the uptake of nitrate by the two species are 7.8 and 6.0 μmol/L, respectively. The uptake rate of phosphate by Nitzschia closterium is higher than that of phosphate by Skeletonema costatum, and the uptake rate of nitrate by Skeletonema costatum are higher than that of phosphate by Nitzschia closterium under the same culture condition.
The uptake rates of phosphate by Nitzschia closterium are also influenced by the condition of light and temperature. The uptake rate and the half-saturation constants decrease with the temperature of the culture medium decreasing; they are similar when the light changes from 1000–3000 lx, and decrease when no light. The effects of the phosphate concentration of the culture medium on the uptake rates are the same as the situation under the condition of light or temperature limitation. |
| Key words: Phytoplankton, Nutrients, Uptake rate, Temperature, Light |
