摘要： 为探索葡萄糖（碳源）添加对浮游植物生长的影响，于2015年7月30日—8月6日用太湖梅梁湾水体进行了碳、氮、磷的营养盐添加试验。试验设置3个处理，每个处理均添加相同水平的氮、磷营养盐，而碳添加浓度分别为0 mg/L（对照组）、51 mg/L（低碳组）和102 mg/L（高碳组）。结果显示，对照组与低碳组的叶绿素a（Chl-a）均显著高于高碳组（P<0.05），3个处理间总悬浮颗粒物（TSS）浓度没有显著差异（P>0.05）；整体上，第1～8天和第6～8天，高碳组的硝酸盐氮（NO3--N）、活性磷（SRP）浓度的降低速率均是最高的，低碳组次之，对照组最慢（P<0.05）。研究表明，葡萄糖添加控制了浮游植物生长，促进了水体中无机氮、磷浓度降低；但在添加葡萄糖的处理中，无机氮、磷浓度降低速度的加快并没有得到更高的浮游植物浓度。

关键词: 葡萄糖, 碳源, 浮游植物, 氮、磷营养盐

Abstract: In order to find the effect of carbon source like glucose on the growth of phytoplankton, an experiment on carbon, nitrogen and phosphorus enrichment to water from Lake Taihu was carried out on the shore of Meiliang Bay, Lake Taihu, during 30 July to 6 August, 2015. There were 3 treatments, in which the nitrogen and phosphorus enrichment was the same, and the gradient carbon enrichment were 0 mg/L (the Control), 51 mg/L (Low Carbon treatment) and 102 mg/L (High Carbon treatment). The results was that the Chl-a of the Control and Low Carbon treatment was significantly higher than that of High Carbon treatment (P<0.05), and the concentration of TSS was not significantly different from each other in the three treatments (P>0.05). The concentration reduction rate of SRP and NO3--N in High Carbon treatment from day 1 to day 8 or from day 6 to day 8 was the highest, and the next was Low Carbon treatment, and that in the Control was the slowest (P<0.05). The results showed that glucose addition controlled the growth of phytoplankton. And the effect of glucose was mainly through the reduction of the concentration of inorganic nitrogen and phosphorus in the water, but the increased decrease of the concentration of this nitrogen and phosphorus did not get more promotion in the concentration of phytoplankton.

Key words: glucose, carbon source, phytoplankton, nitrogen and phosphorus nutrient