The growth of P. cruentum when added organic carbon source, organic nitrogen source and group B vitamin into medium were investigated in the present work. Results showed that glucose promoted growth rate observably. When addedZ% (W/V)glucose into the medium, the growth rate was doubled and biomass increased 92.6%to that of control after incubated 10 days . organic nitrogen source restrained the growth or harmed to P. cruentum. Vitamin Be and B12 also promoted the growth rate.%研究了有机碳、氮源及B族维生素对紫球藻生长的影响。葡萄糖促生长作用最佳，添加2％(W/V)葡萄糖时，藻细胞生长速度比对照组明显提高，培养10d收获的生物量增加92.6％，培养液中的溶解氧含量和藻体叶绿素a含量也有变化。有机氮源的利用率低，仅蛋白胨、酵母汁可被利用。维生素B2和B12也有促长作用。
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