Changes of diversity and composition of fungal communities in rhizosphere of Panax ginseng
Continuous cropping obstacles resulted in the yield losses of Panax ginseng,and affected the development of ginseng in-dustry.Soil fungal communities participated in the key ecological process,and their changes of diversity and composition were related to the continuous cropping obstacles.We analyzed the changes of fungal diversity and composition in the rhizosphere of ginseng using the high-throughput sequencing method,stated the effects of ginseng cultivation on the micro-ecology,and provided effective strategies for overcoming continuous cropping obstacles.Compared to those of the forest soils,the fungal diversity of ginseng rhizosphere soils was increased,and the increasing trends were declined with an increasing years of ginseng cultivation;the relative abundance of Sordario-mycetes,Alatospora,Eurotiomycetes,Leotiomycetes,Saccharomycetes,Mucorales and Pezizomycetes were increased in the rhizo-sphere of ginseng.Pearson′s correlation index indicated that soil chemical perporties affected the relative abundance of fungal communi-ties.pH was significantly related to the relative abundance of Dothideomycetes and Alatospora;the content of available potassium was markedly associated with the relative abundance of Dothideomycetes,Alatospora and Mucorales;the content of total nitrogen was signif-icant correlation with the relative abundance of Sordariomycetes and Mucorales.These results indicated that fertilization was one of piv-otal factors affecting the rhizosphere micro-ecology of ginseng,and optimization of fertilization system was an effective method to over-come continuous cropping obstacles.
NETL
NSTL
万方数据
维普
