The parent atrain of Potassium bacteria P1 was alternatively mutated by UV-ray,DES,and more gemma producing mutant PE-R.

• 试验选用钾细菌P1为出发菌株 ,经紫外线、硫酸二乙酯交替处理 ,筛选出一株产菌量和芽孢量较高的突变株PE -R。