The relationship between shifts in the rhizosphere microbial community and root rot disease in a continuous cropping American ginseng system oleh Yan-Meng Bi, Yan-Meng Bi, Xi-Mei Zhang, Xi-Mei Zhang, Xiao-Lin Jiao, Xiao-Lin Jiao, Jun-Fei Li, Na Peng, Gei-Lin Tian, Gei-Lin Tian, Yi Wang, Wei-Wei Gao