甘草、麻黄根际土壤微生物的生态分布特性

Specific feature of distribution on rhizosphere soil microor-ganisms of wild Ephedra intermedia,Ephedra przewalskii and Glycyrrhiza uralensis and Glycyrrhiza inflata

对野生中麻黄 Ephedraintermedia 、膜果麻黄 Ephedraprzewalskii 、乌拉尔甘草 Glycyrrhizauralensis 和胀果甘草 Glycyrrhizainflata 根际土壤微生物的种类、数量、分布规律及其与土壤肥力关系进行了研究,结果表明,麻黄和甘草根际土壤微生物均以细菌为主,其次是放线菌,真菌最少.甘草根际土壤微生物数量多于麻黄;乌拉尔甘草根际土壤微生物数量多于胀果甘草;中麻黄根际土壤微生物的数量多于膜果麻黄;通过测定土壤微生物数量可间接的判断土壤的肥力.麻黄根际分离的细菌可提高麻黄种子的发芽率.

Species and number of the rhizosphere soil microorganisms about wild Ephedra which distributes in Xinjiang and Glycyrrhiza in Gansu province were studyied.The distribution regularities are:number of rhizosphere soil microorganism of wild Ephedra and Glycyrrhiza is bacteria>actinomycetes>fungi.Number of rhizosphere soil microorganism of wild Glycyrrhiza is larger than Ephedras.Number of Glycyrrhiza uralensis is larger than Glycyrrhiza inflatas.Number of Ephedra intermedia is larger than Ephedra przewalskiis.Which Soil is fertile or not could be explained indirectly by determining number of rhizosphere soil microorganisms.It was also indicated that bacteria isolated from rhizosphere soil of wild Ephedra can increase germination rate of the Ephedra seed.