The catabolic activity and structural diversity of soil bacteria covered by five different halophytic vegetation types in the Yellow River Delta affected by long-term salinization were studied using Biolog-Eco technology. The result showed that soil quality, the diversity, and catabolic activity of the bacterial community of mildly salt-tolerant vegetation ( Imperata cylindrical (L.) Beauv. and Apocynum venetum L.) were significantly higher than those of the bacterial community of highly salt-tolerant vegetation ( Suaeda salsa (L.) Pall. , Aeluropus sinensis (D.) Tzvel.), while these values were lowest for bacterial communities in bare land. The operational taxonomic units (OTUs) and diversity indexes of soil bacteria covered by Aeluropus sinensis were higher than those of soil bacteria covered by other types of vegetation, while those of soil bacteria covered by bare land were lowest. Principal component analysis (PCA) of the carbon source utilization capacity of the soil bacterial communities showed that organic acids, polymers, and amino acids were sensitive carbon sources that enabled study of the diversity of carbon metabolic functions in soil bacterial communities. And redundancy analysis (RDA) showed that d -galacturonic was significantly positively correlated with Verrucomicrobia, which further demonstrated the effect of organic acid carbon sources on metabolic functional diversity of soil bacterial communities in the Yellow River Delta.

中文翻译：

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盐生植被覆盖土壤中细菌群落的分解代谢活性和结构多样性

利用Biolog-Eco技术研究了黄河三角洲受长期盐渍化影响的五种不​​同盐生植被类型覆盖的土壤细菌的分解代谢活性和结构多样性。结果表明，轻度耐盐植物（白茅草和罗布麻）细菌群落的土壤质量、多样性和分解代谢活性均显着高于高盐植物细菌群落的土壤质量、多样性和分解代谢活性。耐受植被（ Suaeda salsa (L.) Pall. , Aeluropus sinensis (D.) Tzvel.），而这些值对于裸地细菌群落是最低的。Aeluropus sinensis 覆盖的土壤细菌的操作分类单位（OTU）和多样性指数高于其他类型植被覆盖的土壤细菌，而裸地覆盖的土壤细菌最低。土壤细菌群落碳源利用能力的主成分分析 (PCA) 表明，有机酸、聚合物和氨基酸是敏感的碳源，可以研究土壤细菌群落中碳代谢功能的多样性。冗余分析（RDA）显示d-半乳糖醛酸与疣微菌显着正相关，进一步证明了有机酸碳源对黄河三角洲土壤细菌群落代谢功能多样性的影响。氨基酸是敏感的碳源，可以研究土壤细菌群落中碳代谢功能的多样性。冗余分析（RDA）显示d-半乳糖醛酸与疣微菌显着正相关，进一步证明了有机酸碳源对黄河三角洲土壤细菌群落代谢功能多样性的影响。氨基酸是敏感的碳源，可以研究土壤细菌群落中碳代谢功能的多样性。冗余分析(RDA)显示d-半乳糖醛酸与疣微菌显着正相关，进一步证明了有机酸碳源对黄河三角洲土壤细菌群落代谢功能多样性的影响。