不同生长时期碱蓬对根际土壤细菌群落结构的影响

Effects of Suaeda glauca at Different Growth Stages on Bacterial Community Structure in the Rhizosphere Soil

土壤微生物是表征土壤质量的重要指标,且对盐碱土壤修复具有重要作用。采用Illumina NovaSeq技术分析松嫩平原盐碱土壤中不同生长时期碱蓬对根际土壤微生物群落结构的影响,以期从微生物的角度评价不同生长时期碱蓬对根际土壤的影响。研究结果表明:随着碱蓬生长时期变化,根际土壤有机质(SOM)和总磷(TP)含量逐渐上升。变形菌门、酸杆菌门和放线菌门为碱蓬根际土壤细菌群落优势菌门。不同生长时期碱蓬土壤有效磷(AP)、有机质(SOM)和pH是影响土壤细菌群落结构的主要环境因子。碱蓬根际土壤细菌的多样性和丰富度高于非根际土壤,并随着碱蓬生长时期增加土壤细菌群落结构和多样性发生改变。总的来说,种植碱蓬能够有效改变盐碱土壤细菌多样性和丰富度,对盐碱土壤进行修复。

Soil microorganism is an important indicator of soil quality,which plays a vital role in the restoration of saline-alkali soil.In this study,Illumina Novaseq technology was used to analyze the effects of Suaeda glauca at different growth stages on the rhizosphere soil microbial community structure,evaluating the influence of Suaeda glauca on the rhizosphere soil from the perspective of microorganisms.The results showed that the content of soil organic matter(SOM)and total phosphorus(TP)in rhizosphere soil gradually increased with the growth of S.glauca.Proteobacteria,Acidobacteria and Actinobacteria were the dominant bacteria in phyla level in S.glauca rhizosphere soil bacterial community.AP,SOM and pH value of S.glauca rhizosphere soil at different growth stages were the main environmental factors affecting the structure of soil bacterial community.The diversity and abundance of bacteria in S.glauca rhizosphere soil were higher than those in non-rhizosphere soil.The structure and diversity of soil bacterial community changed with the growth of S.glauca.In general,planting S.glauca can effectively change the bacterial diversity and abundance of saline-alkali soil,which was helpful for the restoration of saline-alkali soil.