Differences of Microbial Diversity and Network Characteristics in Crocus sativus-Planting Soil of Different Continuous Cropping Years
[Objective]To explore the diversity and network structure of bacterial and fungal communities in soil microorganism of Crocus sativus in different years of continuous cropping.[Method]High-throughput sequencing was carried out to determine the diversity,composition and network structure of bacterial and fungal communities in soil microorganism of C.sativus.[Result]The diversity of bacteria and fungi in soil of C.sativus had significant changes,especially the OTUs,Shannon,Simpson,Chao and ACE indices of fungi,which showed a significant increase trend with the increase of continuous cropping years.The results of PCoA and NMDS showed that there were significant differences in the composition of bacteria and fungi in soil of C.sativus in different years of continuous cropping.At the bacterial phylum level,Actinobacte-ria,Proteobacteria,Acidobacteria,Chloroflexi and Planctomycetes were the top five phyla.At the fungal phylum level,Ascomycota(55%)was the most abundant phylum.The relative abundance of Actinobacteria and Gemmatimonadetes were lower in soils of continuous cropping 4 year than continuous cropping 1,2 and 3 year.The relative abundance of Solicoccozyma was signifcantly higher in soils of continuous cropping 4 year than continuous cropping 1,2 and 3 year(P＜0.05).There were different connectivity patterns of bacteria and fungi in C.sativus-plant-ing soil of different continuous cropping years.[Conclusion]The study describes the differences of microbial diversity,composition and network structure in C.sativus-planting soil of different continuous cropping years,and explores the mechanism of C.sativus continuous cropping obsta-cles from a microbial perspective,providing reference for solving the obstacles of continuous cropping in C.sativus.
万方数据
维普
