7Xusheng ZHAO, Wenchao ZHEN, Yongzhi QI, et al.Coordinat- ed effects of root autotoxic substances and Fusarium oxyspo- rum Schl.f.sp.fragariae on the growth and replant disease of strawberry [J].Frontiers of Agriculuture in China, 2009,3 ( 1 ) : 34- 39.