宁夏境内腾格里沙漠固沙植物根际土壤真菌多样性研究

发布时间：2018-05-05 01:42

本文选题：生境 + 沙生植物　；参考：《菌物学报》2017年05期

【摘要】：从宁夏境内腾格里沙漠不同生境固沙植物根际采集土样108份,共分离得到257株真菌分属于26属,其中青霉属Penicillium、曲霉属Aspergillus、镰刀菌属Fusarium、链格孢属Alternaria、茎点霉属Phoma、毛霉属Mucor、木霉属Trichoderma和丛梗孢属Monilia是固沙植物根际土壤中普遍存在的真菌种群。多样性分析结果表明,沙漠区真菌物种丰富度、Shannon-Wiener多样性指数和Pielou均匀度最高,分别为16、2.5893和0.9339;而草原区物种丰富度、Shannon-Wiener多样性指数和Pielou均匀度最低,分别为14、2.0891和0.7961。Jaccard相似性研究表明,宁夏境内腾格里沙漠地区4个生境固沙植物根际土壤真菌种群相似性为中等不相似。半荒漠区与封育区相似性最高,草原区与沙漠区相似性最低。典范对应分析(CCA)可知,土壤真菌的种类和数量与土壤性状变化密切相关。9个土壤性状中,氮含量和钾含量是根际真菌群落变化的最主要影响因子。
[Abstract]:108 species of soil samples were collected from the rhizosphere of sand fixing plants in different habitats of the Tengger Desert in Ningxia. 257 fungi belonging to 26 genera were separated, including Penicillium Penicillium, Aspergillus Aspergillus, Fusarium Fusarium, Alternaria, Phoma, Mucor, Trichoderma of Trichoderma, and Monilia of genera of genera. The diversity analysis showed that the species richness of the desert area, the Shannon-Wiener diversity index and the Pielou evenness were the highest, 16,2.5893 and 0.9339, while the species richness of the grassland, the Shannon-Wiener diversity index and the Pielou evenness were the lowest, respectively, 14,2.0891 and 0.7961. .Jaccard similarity study showed that the similarity of fungi population in the rhizosphere soil of 4 habitats in the Tengger Desert Area in Ningxia was not similar. The similarity between the semi desert area and the seal area was the highest, and the similarity of the grassland area and the desert area was the lowest. The species and quantity of soil fungi and the soil properties were closely related to the canonical correspondence analysis (CCA). Nitrogen content and potassium content were the most important factors affecting the change of rhizosphere Fungi Community in.9 related soil properties.

【作者单位】：甘肃农业大学植物保护学院;宁夏农林科学院植物保护研究所/宁夏植物病虫害防治重点实验室;
【基金】：国家自然科学基金(31260009) 宁夏农林科学院科技创新先导资金(NKYJ-15-33) 宁夏自然科学基金(NZ16104)~~
【分类号】：S154.3

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