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Enhancement effects of rare earth elements on the growth of Chaetoceros mulleri is studied in this paper. The results show that all of the light, middle and heavy rare earth elements have similar enhancement effect on the growth of Chaetoceros mulleri, with the beneficial μμconcentrations of La, Gd and Yb being 7.28~87.40mol/L, 6.36~57.23mol/L and 5.78~17.34μmol/L. The optimum concentrations of La, Gd and Yb are 7.28 ~50.98μmol/L,31.80~44.52μmμ ol/L and 5.78~17.34mol/L, respectively. When the concentrations of La , Gd and Yb are 7.28~87.40μmol/L, 6.36~57.23μmol/L and 5.78~17.34μmol/L, the concentrations of chlorophyll have increased by 9.3~47.0%, 33.4~44.3%, and 36.5~40.3%, respectively as compared with the control group. The mechanism of enhancement of rare earth elements on the growth of Chaetoceros mulleri is also discussed in this paper.
Enhancement effects of rare earth elements on the growth of Chaetoceros mulleri is studied in this paper. The results show that all of the light, middle and heavy rare earth elements have similar enhancement effect on the growth of Chaetoceros mulleri, with the beneficial μμconcentrations of La , Gd and Yb were 7.28 ~ 87.40mol / L, 6.36 ~ 57.23mol / L and 5.78 ~ 17.34μmol / L. The optimum concentrations of La, Gd and Yb are 7.28 ~ 50.98μmol / L, 31.80 ~ 44.52μmμ ol / L when the concentrations of La, Gd and Yb are 7.28 ~ 87.40μmol / L, 6.36 ~ 57.23μmol / L and 5.78 ~ 17.34μmol / L, the concentrations of chlorophyll have increased by 9.3 ~ 47.0%, 33.4-44.3%, and 36.5-40.3%, respectively as compared with the control group. The mechanism of enhancement of rare earth elements on the growth of Chaetoceros mulleri is also discussed in this paper.