摘要
本文在藻类不同生长时期、光照、黑暗和光照+DCMU以及不同硝酸盐浓度、温度和pH条件下,研究了环境因子对三角褐指藻亚硝酸盐释放的影响。研究结果表明:三角褐指藻在光照、硝酸盐浓度大于10μmol/L、温度范围18～22℃和pH为8左右条件下,亚硝酸盐释放速率最大。亚硝酸盐在特定条件下的释放对于我们了解海洋中由浮游植物产生的亚硝酸盐第一最大层的形成机制有着十分重要的意义。
The study on the effects of environmental factors on nitrite exctetion of Phaeodacty-lum tricornutum were conducted under different growth phase,light,dark,light+ DCMU,different nitrate concentration,temperature and pH.The tesults are as follows:The maximum excretion rate was found at the condition of light,NO3->10μmol/L,18-22℃ and pH around 8.The excretion of nitrite by phytoplankton under special conditions is very important in understanding the formative mechanism of maximum layer of primary nitrate caused by phytoplankton in the ocean.
关键词
三角褐指藻
亚硝酸盐
生态学
藻
environmental factors
Phaeodactylum tricomutum
nitrite excretion.
