培藻肥水型EM菌对3种微藻生长的影响

Effects of EM Bacteria on Growth of Three Species of Microalgae

在水温(22±1)℃和连续光照强度为50μmol·m^(-1)·s^(-2)下,取主要由乳酸菌、硝化菌、芽孢杆菌、光合菌,及酵母菌等组成的培藻肥水型EM菌0.5m L、2.5m L或5.0m L,分别加入到200m L密度相同的小新月菱形藻Nitzschia closterium f.、球等鞭金藻3011 Isochrysis galbana parke和小球藻Chlorella sp.中培养15d,以f培养基为对照,研究不同浓度培藻肥水型EM菌对这3种藻类生长的影响。结果表明:EM菌对金藻、硅藻、绿藻的生长都有一定的促进作用,其中对金藻及硅藻生长的促进作用更加显著,生长率提高20%~50%,最终细胞密度有所提高,添加5m L促生长作用更持久。

EM bacteria primary comprised of lactic acid bacteria, Bacillus subtilis, photosynthetic bacteria and yeasts were added into200 m L medium containing the same concentrations of three species of microalgae（ Nitzschia closterium f., Chlorella sp., and Isochrysis galbana parke 3011） at a dose of 0.5 m L, 2.5 m L or 5 m L to evaluate the EM bacteria on the microalga growth at water temperature of（ 22±1） ℃ and constant light intensity of 50 μmol·m^-1·s^-2 for 15 days. The results showed that the EM bacteria led to improve the growth of three species of microalgae by 20% - 50%, with longer acceleration of growth in the microalgae at an EM bacterium dose of 5 m L.