石油和油分散剂对藻类胞内外有机氮的影响

THE EFFECTS OF CRUDE OILS AND DISPERSANT ON CELLULAR AND EXTRACELLULAR ORGANIC NITROGEN IN CONTINUDUS CULTURE

Shengli and Bohai oils and a dispersant Corexit 9527 were used in the chronic and acute-crude oil experiments in continuous culture of algae, Phaeodactylum tricornutum and Du-naliella sp.. The experiment results showed that in chronic pollution experiments. PON was related with the growth of the algae, i. e. growth was stimulated with the decrease of PON, inhibited with the increase of PON. DON decreased and DFAA increased in the experiments. In acute pollution experimets, PON varied with the species of algae, DON increased and DFAA decreased. The" effects of oils in oil-plus-dispersant experiments was strengthened, but the extent of dispersant influence was different with the difference of specis of algae, crude oil and the way of pollution. The variation of the ratio of DON/PON and DFAA/DON were also discussed.