应用正交试验法研究3，2960菌株的固态分批补料发酵条件

选取了对赤霉素真菌３，２９６０菌株产赤霉素能力有影响的七个因素，即培养时间、培养温度、接种量、培养基的初始ｐＨ值，加入玉米淀粉的时间，加入玉米淀粉的量，取下牛皮纸通气的时间，进行六水平正交试验。其结果表明：培养温度对赤霉素含量影响最大，其它为次要因素，培养基的初始ｐＨ值最不重要。该试验找出了使赤霉素含量达最高时的培养条件。

Fed-batch Solid-state Fermentation Study of Strain 3,296 0 by Using Orthogonal Tests

Seven factors which in fluence on the capability of producing gibberelic acid of strain3,2960 were chosen. They are culture time,culture temperature,amount of vaccination,prelimindrypH value of the culture medium , adding-time with corn starch, amcunt of corn starch added andventilation time without wrapping paper. Six-level orthogonal tests were made with these seven foc-tors, The results showed that among the seven selected factors which influence the production of gib-berellic acid of strain 3,2960,the calture temparatare was the most evident,while the others weresecondary,and the least important factor was the preliminary pH valac Of culture medium. The opti-mum ferment condition for producing the greatest amount of gibberellic acid of strain 3,2960 wasfound.