The new addition of cyaneus in actinomycetes group in rhizosphere soil and non - rhizosphere soil may be fundamental reason for the second rotation effect . ( 4 ) compared to the young stand of pinus sylvestris var 二代林放线菌类群中具有兰色类群和玫瑰紫亚类，樟子松林则没有，而樟子松林土壤具有的放线菌中的金色类群和绿色类群，二代林则没有。
