Effect of Dry Mycelium of Penicillium chrysogenum and Bacillus subtilis Mixture on the Float Seedling of Nicotiana tabacum L.cv.K326 in Three Substrates

• XIE Hong, 
• ZHANG Limeng, 
• YANG Hailin, 
• SHI Hongmin, 
• YAN Chunli, 
• WANG Jianguang, 
• CHEN Suiyun