摘要
试验调查了我国广州、昆明、武汉、北京和哈尔滨5个地区在不同季节 VA 菌根真菌(Endogonaceae)的发生频率以及不同作物根际 VA 菌根真菌的种群密度和丰度。结果表明:在我国南方的广州和武汉,VA 菌根真菌的种类较北方的哈尔滨和北京更为丰富。各种真菌在秋季分离到的频率较春季高,此外,在秋季真菌的孢子密度也较大。从作物来看:禾本科作物根际较其他几类作物有更高的孢子密度和种群丰度。在我国较普遍发生的真菌种类有:Glomus mos-seae,G.fasciculatum,G.geosporum,G.constrictum 和 G.claroideum。
Occurence frequency of vesicular-arbuscular mycorrhizal fungi (Endogonaceae) in different seasons and spore density and species richness of VAM fungi in the rhizospheres of various crops were investigated in Guangzhou (South China),Kunming (Southwest China),Wuhan (Central China),Beijing (North China) and Harbin (Northeast China) .The obtained results showed that Guangzhou and Wuhan of the South had richer VAM fungalspecies than Harbin and Beiiing of the North.The spore density and occurence frequency of VAM fungi were biger in fall than in spring.There were high spore density and spe- cies richness in the rhizospheres of cereal crops among the investigated plants. The VAM fungal species that commonly occurred in China were Glomus mosseae, G.fasciculatum,G.geosporum,G.constrictum and G.claroideum.
