栽培年限的增加对人参根区土壤养分及微生物群落结构的影响OA北大核心CSTPCD

Soil pH,electrical conductivity and various nutrients were measured in the root zone of ginseng with reference to relevant industry standards,and soil fungi,bacteria and actinomycetes were cultured using isolation media.In the same situation,soil microbial community structure also showed some changes,among which the number of soil fungi tended to increase with the increase of cultiva-tion years,and the number of bacteria and actinomycetes tended to decrease;Pilsen correlation analysis showed that there was a close relationship between soil nutrient factors and microorganisms,and the correlation coefficients with statistical significance(≥0.2)in this study accounted for 84.62％of the overall data.The results of sequencing showed that Proteobacteria were the main bacterial phyla in the test soils,and planting ginseng had a significant impact on soil bacterial community structure,leading to a decrease in the relative abundance of common dominant groups and promoting the proliferation of harmful bacteria such as WPS-2;Ascomycota were the main bacterial phyla in the test soils.Ascomycota,which is the main fungal community structure,was affected by planting ginseng,and the relative abundance of conventional species was reduced,and pathogenic fungal groups such as Humicola,Fusarium,and Ilyonectria proliferated had symbiotic relationships with each other.In conclusion,the regulation of soil nutrients by soil microorganisms is positive,and it is important to clarify life activities and development rules of soil microorganisms,which can provide theoretical basis for promoting the optimization and upgrading of ginseng cultivation industry.