浙江省五、七干校“九二○”生产小组采用楝树皮作为“九二○”的一级种子培养基,其菌丝体生长浓密粗壮,不亚于马铃薯葡萄糖琼脂培养基。把用楝树皮培养的一级种子直接接入三级瓶子固体发酵,成品经测定,“九二○”含量都在一万单位以上。一、切块培养法。取新鲜楝树皮洗净,刮去质角,切成块片(长度一般以试管的五分之一为宜),装入试管(试管底部可放一小团用清水浸湿的棉花),灭菌,接种。接种时 The “920” production team of the fifth and seventh cadre schools in Zhejiang Province adopted the bark of Neem bark as the first grade seed medium of “920”, and the mycelium grows densely and stoutly, no less than potato dextrose agar. The neem bark cultured seed directly into the three bottles of solid fermentation, the finished product was determined, “920” content of more than ten thousand units. First, cut culture method. Take fresh neem bark wash, scrape off the horn, cut into pieces (length is generally one fifth of the test tube is appropriate), into the test tube (tube can be placed at the bottom of a small group soaked with water, cotton) Sterilization, inoculation. Inoculation