准噶尔盆地南缘两种典型禾本科植物根鞘土壤微生物群落功能多样性

发布时间：2018-05-12 16:43

本文选题：根鞘 + 微生物功能多样性　；参考：《生态学报》2017年17期

【摘要】：以准噶尔盆地南缘两种禾本科植物的根鞘与其外围土壤为研究对象,采用Biolog-ECO微平板检测法对土壤微生物群落功能多样性进行了研究。结果表明:两种植物根鞘土壤的有机质、全氮、速效氮和速效钾均高于根鞘外围土壤;两种禾本科植物根鞘土壤的微生物平均颜色变化率(AWCD)、香农多样性指数、均匀度指数、优势度指数和丰富度指数均高于根鞘外围土壤;两种植物根鞘土壤微生物主要利用的碳源类型为羧酸、糖类和聚合物,其中芨芨草根鞘微生物是以利用羧酸、糖类、聚合物和氨基酸类物质为主,羽毛针禾根鞘土壤微生物是以利用糖类、氨基酸和聚合物为主;微生物平均颜色变化率与Shannon多样性指数、均匀度指数、速效钾和全氮呈显著相关性,除了全钾以外,与其余的土壤理化指标均存在正相关性。总而言之,根鞘结构改善了微生物的生存环境,提高了土壤微生物群落功能多样性,从而增强了缓冲外界不利影响的能力。
[Abstract]:The functional diversity of soil microbial communities was studied by Biolog-ECO microplate method with the root sheaths of two grasses and their peripheral soils in the southern margin of Junggar Basin as the research objects. The results showed that the organic matter, total nitrogen, available nitrogen and available potassium in the soil of root sheath of two plants were higher than those in the soil around the sheath of root sheath, and the average color change rate of microorganism was AWCD, Shannon diversity index and evenness index in the soil of root sheath of two gramineous plants. The dominant index and richness index were higher than those in the outer soil of root sheath, and the main carbon source types used by microbes in the soil of root sheath were carboxylic acid, carboxylic acid and polymer, among which Achnatherum splendens root sheath microorganism was composed of carboxylic acid and carboxylic acid, sugar, carboxylic acid and carboxylic acid. Polymer and amino acid are the main substances, the microbes in the root sheath are mainly using carbohydrate, amino acid and polymer, the average color change rate of microorganism and Shannon diversity index, evenness index, the average color change rate of microorganism, the diversity index of Shannon, the evenness index of microorganism, There was a significant correlation between available potassium and total nitrogen, except for total potassium, there was a positive correlation between available potassium and other soil physical and chemical indexes. In a word, the root sheath structure improves the living environment of microbes, enhances the functional diversity of soil microbial communities, and thus enhances the ability to buffer the adverse effects of the outside world.
【作者单位】：石河子大学生命科学学院;
【基金】：新疆生产建设兵团社会发展科技攻关与成果转化计划项目(2015AD023)
【分类号】：S154.3

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