土壤全磷和有效磷对土壤真菌功能类群的影响

Effects of Soil total Phosphorus and Available Phosphorus on Soil Fungal Functional Groups

为了探究土壤全磷和有效磷对不同真菌功能类群的影响,于2018年,在浙江百山祖国家级自然保护区亚热带森林动态监测样地(25 hm 2)进行土壤样品采集,采用Illumina高通量测序技术测定土壤真菌群落组成,结合土壤理化性质,分析土壤全磷和有效磷对丛枝菌根真菌、外生菌根真菌、植物病原菌和土壤腐生菌的影响,并构建土壤全磷和有效磷与真菌功能类群的共线性网络。结果表明,土壤全磷和有效磷能显著提高外生菌根真菌和植物病原菌的丰富度;同时,土壤全磷还能显著提高土壤腐生菌的丰富度,土壤有效磷还能显著降低丛枝菌根真菌的丰富度。此外,土壤全磷和有效磷通过影响不同真菌功能类群间接驱动真菌群落结构变化并显著预测功能类群的群落变异。综上结果表明,土壤全磷和有效磷可以驱动不同真菌功能类群的群落变化。

In order to explore the effects of soil total pphosphorus and available phosphorus on different fungal functional groups,soil samples were collected from 25 hm2 of subtropical forest dynamic plot in Baishanzu National Nature Reserve,Zhejiang Province.The composition of Soil fungal community was determined by Illumina high-throughput sequencing technology,and the effects of soil total phosphorus and available phosphorus on arbuscular mycorrhizal fungi,ectomycorrhizal fungi,plant pathogens and soil saprotrophytic fungi were analyzed combined with soil physical and chemical properties.Furthermore,the co-occurrence networks of soil total phosphorus and available phosphorus with fungal functional groups was constructed.The results showed that soil total phosphorus and available phosphorus significantly increased the richness of ectomycorrhizal fungi and plant pathogens,and soil total phosphorus could significantly increase the richness of soil saprotrophtic fungi,while available phosphorus reduced the richness of arbuscular mycorrhizal fungi.In addition,soil total phosphorus and available phosphorus can indirectly drive the change of fungal community structure by affecting different fungal functional groups and significaltle predict the community of functional groups.In summary,soil total phosphorus and available phosphorus can drive the community changes of different fungal functional groups.