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EFFECTS OF ARBUSCULAR MYCORRHIZAL FUNGI ON GROWTH AND DISEASE RESISTANCE OF REPLANTED GINKGO( Ginkgo biloba L.) SEEDLINGS

QI Guohui, ZHANG Linping,YANG Wenli,LU Xiuru,LI Chunli(Forestry College ,Aricultural University of Hebei, Baoding 071000)  
Effects of arbuscular mycorrhizal (AM) fungi, Glomus mosseae (Nicol. Gerd.)Gerd. Trappe, Glomus intraradices Schenck Smith, Glomus versi forme (Karsten) Berch on the growth of replanted Ginkgo seedlings was investigated. The results showed that infection of AM fungi could increase the seedling growth in both sterilized and non-sterilized soil. The seedling height, leaf area,dry mass of leaf and root, chlorophyll content of leaf were significantly improved by AM fungal colonization. The seedling height was increased by 17 6%~38 0%, and the dry mass of leaf was increased by 20 4%~47 3%compared to control. Root TTC reducing activity of seedling was 1 30~1 41 times than that of control treatment. The disease index of replanted ginkgo leaf blight( Alternaria alternata (Fr.) Keissl; Glomerella cingulata (Stonem.) Spauld. et Schrenk; Pestalotia ginkgo Hori) was significantly reduced by these three AMF inoculation, it reduced by 41 6~63 4% in sterilized soil and 63 9~73 1% in non~sterilized soil.
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