辽宁省刺萼龙葵入侵区和未入侵区土壤真菌多样性研究

A study on soil fungal diversity of Solanum rostratum-invaded and non-invaded areas in Liaoning province

2008-2009年,对辽宁省刺萼龙葵入侵区(Ⅰ)以及未入侵区(Ⅱ)进行了选择性的取土和抽样调查。对采集的150份土样用平板法培养,经分离、纯化共鉴定的真菌分属30个属,其中刺萼龙葵入侵区(Ⅰ)21个属。通过计数统计发现在刺萼龙葵入侵区(Ⅰ)土壤真菌的各种类群中,以青霉属、曲霉属、木霉属、毛霉属、根霉属、镰孢菌属、枝顶孢属种类较多,为该区的优势类群。根据Jaccard相似性指数原理,刺萼龙葵入侵区(Ⅰ)与未入侵区(Ⅱ)土壤真菌群落的相似性指数Cj值为0.50～0.75,属于中等相似水平,其真菌多样性差异并不显著。从土壤真菌的角度分析,刺萼龙葵向未入侵区(Ⅱ)扩散蔓延的可能性较大。

Soil fungal diversity and numbers were analysed in Solanum rostratum-invaded and non-invaded areas in Liaoning province from 2008 to 2009.One hundred and fifty soil samples were collected and cultured with the soil plate method.All the species were identified and divided into 30 genera,of which Penicillium,Aspergillus,Trichoderma,Mucor,Rhizopus and Fusarium were the dominant groups of the S.rostratum-invaded areas.According to the Jaccard index of similarity theory,the similarity level of the soil fungal communities was medium between the invaded and non-invaded areas.Cj values were between 0.50 and 0.75.Soil fungal diversity was not significantly different between invaded and non-invaded areas.From the soil fungal flora,it is probable that S.rostratum spread to non-invaded areas.