轻、中和重稀土元素对球等鞭金藻的促生长作用

Enhancement of 3 rare earth elements to Isochrysis galbana

轻、中和重稀土元素对球等鞭金藻的生长有相同程度的促进作用，但其有益浓度范围不同，镧为７．２８～８７．４０μｍｏｌ／Ｌ，钆为６．３６～５７．２３μｍｏｌ／Ｌ，镱为５．７８～１７．３４μｍｏｌ／Ｌ。这３种稀土元素对球等鞭金藻的最佳浓度分别为：３６．４２～６５．５５，１９．０８～５７．２３和５．７８～１７．３４μｍｏｌ／Ｌ。可分别提高单胞藻数量２１．８％～２４．３％，１０．４％～１７．２％和１７．９％～２３．０％；叶绿素含量较对照组分别提高了２９．３％～４１．２％，２５．６％～３８．１％和３６．５％～４０．３％。

The degrees of enhancement effect of light,middle and heavy rare earth elements to Isochrysis galbanaare similar,the beneficial concentrations of La,Gd and Yb range from 7.28～87.40μmol/L,6.36～57.23μmol/L and 5.78～17.34μmol/L,respectively.Their optimum concentrations range from 36.42～65.55μmo/L,19.08～59.23μmo/L and 5.78～17.34μmol/L respectively,which make the cell numbers increase by 21.8%～24.3%,10.4%～17.2% and 17.9%～23.0%.The comcentrations of chlorophyll increased by 29.3～41.2%,25.6～38.1% and 36.5～40.3% compared with the control group.