芒草对盐碱地土壤理化特性和微生物群落组成的影响OA
Effects of Miscanthus on soil physicochemical characteristics and microbial community composition in saline-alkali soil
[目的]探讨种植不同种类芒草对盐碱地土壤理化特性及微生物群落组成结构的影响,为选择适宜的芒草种类用于盐碱地生态修复提供依据.[方法]在芒(Miscanthus sinensis)、荻(Miscanthus sacchariflorus)、五节芒(Miscanthus floridulus)、南荻(Miscanthus lutarioriparius)、奇岗(Miscanthus×longiberbis)等 5 种芒草的种植地分别采集根际土、非根际土以及裸地(CK)土壤样品,测定土壤理化特性,并利用高通量测序技术分析土壤微生物群落组成.[结果]与裸地土壤相比,种植芒草显著改善了土壤环境:5种芒草种植地的土壤含水量增加,其中芒种植地的含水量显著增加,增加了 40.4％;土壤pH和全盐含量降低,其中奇岗种植地的pH与CK相比降低了2.6％,荻种植地的全盐含量显著降低了 83.9％;有机碳、全氮和速效磷含量增加;微生物群落α多样性差异不明显,但群落组成结构发生显著变化,优势菌门为假单胞菌门(Pseudomonadota);酸杆菌门(Acidobacteriota)、放线菌门(Actinobacteriota)和绿弯菌门(Chloroflexota)的相对丰度显著增加,而芽单胞菌门(Gemmatimonadota)和蓝细菌门(Cyanobacteria)的相对丰度显著降低.[结论]种植芒草能有效改良盐碱地土壤理化性质、提升土壤肥力并优化微生物群落结构.综合改良效果以荻为最佳.本研究结果可为盐碱地生态修复中芒草种类的选择提供理论依据和实践指导.
[Objective]To investigate the effects of planting different Miscanthus species on the physicochemical properties of saline-alkali soil and the composition and structure of the microbial community,thus providing a basis for selecting suitable Miscanthus species for ecological restoration of saline-alkali land.[Method]Rhizosphere soil,non-rhizosphere soil,and bare land(CK)soil samples were collected from the planting sites of five Miscanthus species:Miscanthus sinensis,Miscanthus sacchariflorus,Miscanthus floridulus,Miscanthus lutarioriparius,and Miscanthus × longiberbis.Soil physicochemical properties were measured,and high-throughput sequencing technology was employed to analyze the composition of the soil microbial community.[Result]Compared with bare land soil,planting Miscanthus significantly improved the soil environment:soil water content increased in the planting sites of all five Miscanthus species,with a significant increase of 40.4％in the Miscanthus sinensis planting site.Soil pH and total salt content decreased,with a 2.6％reduction in pH in the M.× longiberbis planting site compared to CK,and a significant 83.9％reduction in total salt content in the M.sacchariflorus planting site.The contents of organic carbon,total nitrogen,and available phosphorus increased.While no significant differences were observed in microbial community α diversity,the community composition and structure underwent significant changes,with Pseudomonadota being the dominant phylum.The relative abundances of Acidobacteriota,Actinobacteriota,and Chloroflexota significantly increased,whereas those of Gemmatimonadota and Cyanobacteria significantly decreased.[Conclusion]Planting Miscanthus effectively ameliorates the physicochemical properties of saline-alkali soil,enhances soil fertility,and optimizes microbial community structure.Among the tested species,M.sacchariflorus exhibited the best overall improvement effects.The findings of this study provide a theoretical basis and practical guidance for selecting Miscanthus species in the ecological restoration of saline-alkali land.
张哲;宗俊勤;李玲;陆海龙;薛建辉
南京林业大学生态与环境学院,南方现代林业协同创新中心,江苏 南京 210037江苏省中国科学院植物研究所,江苏 南京 210014江苏省中国科学院植物研究所,江苏 南京 210014江苏省中国科学院植物研究所,江苏 南京 210014南京林业大学生态与环境学院,南方现代林业协同创新中心,江苏 南京 210037||江苏省中国科学院植物研究所,江苏 南京 210014
生物科学
芒草盐碱地土壤理化性质微生物群落组成
Miscanthus spp.saline landsoil physical and chemical propertiesmicrobial community composition
《南京林业大学学报（自然科学版）》 2026 (1)
50-57,8
江苏省林业科技创新与推广"揭榜挂帅"项目(LYKJ[2022]02).
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