• 关键词：遮光  藻  叶绿素a  抑制作用

• 基金项目：国家重点基础研究(973)项目(No.2002CB412409);上海市科委重大科技攻关项目(No.04DZ12030-2)

• 陈雪初
• 上海交通大学环境科学与工程学院, 上海 200240

• 孙扬才
• 上海交通大学环境科学与工程学院, 上海 200240

• 张海春
• 上海交通大学环境科学与工程学院, 上海 200240

• 李春杰
• 上海交通大学环境科学与工程学院, 上海 200240

• 王晓冬
• 温州水务集团公司, 温州 325000

• 孔海南
• 上海交通大学环境科学与工程学院, 上海 200240

• 摘要：进行了遮光法控制富营养化水池中藻类的中试研究.结果显示,9d试验后,叶绿素a浓度、COD、浊度、DO分别由遮光前的130.5μg·L^-1、30.9mg·L^-1、20.0NTU、12.0mg·L^-1下降至处理后的24.8μg·L^-1、1.7mg·L^-1、5.4NTU、3.1mg·L^-1,TP、TN浓度则变化不明显.表明遮光处理能够在营养盐浓度变化不大的状况下大幅度削减藻类生物量

• Abstract：Apilot-scale experiment of alga control by light shading was conducted in a eutrophicated pond. The results showed that light shading could greatly reduce the alga biomass without removing nutrients after 9 days, considering that Chla declined from 130.5μg·L^-1 to 24.8μg·L^-1; COD from 30.9 mg·L^-1 to 1.7mg·L^-1; turbidity from 20.0 NTU to 5.4 NTU and DO from 12.0 mg·L^-1 to 3.1 mg·L^-1; but TPand TNdid not vary significantly. After light shading for 1 day, Chla, CODand turbidity 105 cm beneath the water were higher than at the water surface, showing that alga was likely to sediment after light shading. After light shading for 2 days, the net productivity 30cm beneath the water was negative, suggesting that the photosynthetic rate was inhibited, which induced algal death.

• Key words：light shading  alga  Chla  inhibition

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