Influẽncia de duas fomas de nitrogênio no crescimento de microcystis aeruginosa KutZ - cyanoprocariota

Abstract

Microcystis aeruginosa Kutz, Cyanoprokaryote was cultivated in the laboratory to test the hypothesis that blue-green algae growth is greater in ammonia than in nitrate. In order to verify this hypothesis, a laboratory evaluation of the increase in biomass in three different treatments was carried out. An 18-day experiment with bath cultures was carried out, during which pH and ambient temperature were measured as control parameters of the experiment, and oxygen, chlorophyll a and biovolume as indicators of algae growth. In this study it was found that Microcystis aeruginosa assimilates the two forms of nitrogen (nitrogen as nitrate and nitrogen as ammonia) with greater growth being recorded in the treatment with nitrate. This result contradicts the initial hypothesis that is based on the findings of Blomquist et al (1994). (TRADUÇAO NOSSA)