土壤因子对野生植物AM真菌的影响

1　引　　言关于生态因子对ＡＭ真菌发生和分布的影响 ,国内外均有报道1,2 ,7] ,张美庆等6] 比较系统地研究了我国东、南沿海七省ＡＭ真菌的生态分布 ;吴铁航5] 报道了几种土壤因子对栽培作物根围内ＡＭ真菌分布的影响 .本文主要介绍土壤类型、质地、营养状况、ｐＨ等对野生植物根围ＡＭ真菌的侵染、孢子密度和种属分布的影响 .2　研究地区与研究方法2 1　研究地区概况山东省位于 33°2 5′～ 38°2 3′Ｎ ,114°36′～ 12 2°4 3′Ｅ之间 ,属暖温带大陆性季风气候 ,年平均气温 11～ 14℃ ,年平均降水量为 5 5 0～ 95 0ｍｍ .根据地貌不…

Effects of soil factors on arbuscular mycorrhizae(AM)fung i around roots of wild plants

150 rhizospheric soil samples were collected from 45 wild plants distributed in Shandong Province during 1995-1997. More than forty species of AM fungi were isolated, and the effects of some soil factors on AM fungi were also investigated. It was proved that soil conditions were important factors to the colonization, growth, and distribution of AM fungi. Spore numbers were highest in brown earth, and lowest in alkali-saline soil. Glomus occurred in all types of soil. The occurrence frequency of Gigaspora and Scutellospora was much higher in brown earth. The distribution of AM fungi was also affected by soil pH. Glomus occurred in soil with a wide pH range. The greater of soil alkalinity, the more Glomus were found, while the greater of soil acidity, the more Acaulospora were isolated. Scutellospora occurred mostly in soil with pH of 6.0-7.0, and Gigaspora distributed mainly in acid soil.