As far as the individual with the longest adventitious root and the average value of the long adventitious root were concerned,the medium mixed by sawdust and Danmark commercial medium in a ratio of 1 to 1 got the highest value.

• 锯末与丹麦基质(1?1)的平均不定根最长值和单株不定根最长值最长分别为15 cm和21.；7 cm。