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对新疆天山北坡单甸草原带、荒漠单原带、单原化荒漠带和典型荒漠带4种不同地带类型中优势植物的菌根发育状况、根际土壤中丛枝菌根(AM)真菌孢子的密度和生物体积以及AM真菌的多样性和地带分布进行了研究.在4种不同地带类型的调查中,共分离到28种AM真菌,隶属于无梗囊霉属(Acaulospora)、原囊霉属(Archaeospora)和球囊霉属(Glomus).其中,G.aggregatum,G.claroideum,G.deserticola,G.etunicatum和G.sinuosum,为4种地带类型中的共有种,其余的24种AM真菌在各地带性中的分布则因地带类型的不同而有所差异.在4种不同的地带类型中,各寄主植物的平均菌根侵染率差异不显著,表明在4种地带类型中,AM真菌是同等重要的;根际土壤的孢子密度和生物体积都表现出因地带性的不同,而有所差异,以草甸草原带最高,典型荒漠带最低;同时,AM真菌的物种丰富度和多样性也呈现相同的规律.就单一的植物而言,以草原化荒漠带中的小车前和典型荒漠带中的东方旱麦草的茵根侵染率最高,分别为:84.48%和83.11%.
The morphological and morphological changes of mycorrhizal colonies in four different types of single meadow grassland, single desert zone, single desert zone and typical desert zone in the northern slope of Tianshan Mountains of Xinjiang, respectively. The arbuscular mycorrhizal (AM) fungi Spore density and biomass as well as the diversity and zonation of AM fungi were studied.A total of 28 AM fungi isolated from Acacia sp., Acaulospora, Archaeospora and Glomus, among which G.aggregatum, G. claroideum, G.deserticola, G.etunicatum and G..sinuosum are the common species among the four zonal types, while the remaining 24 species The distribution of arbuscular mycorrhizal fungi (AMF) in different zonules differed from one genotype to another.The average mycorrhizal infection rates among host plants were not significantly different among the four types of zone types, indicating that among the four zonal types , AM fungi were equally important. The spore density and biomass of rhizosphere soils showed the difference in zonality, but the difference was the highest in the meadow steppe and the lowest in the typical desert. At the same time, the arbuscular mycorrhizal fungi species rich Degree and diversity also show the same pattern For to mycorrhizal infection rate before steppe desert belt in the car and in a typical desert with oriental Eremopyrum highest, are as follows: 84.48% and 83.11%.