Effects of Peat Soil and Mushroom Residue Application on the Potato Root-Associated Microbiome and Yield
Improving soil structure of the paddy-upland rotation is an important measure to enhance the efficiency of soil nutrient supply for winter potatoes.In this study,an investigation was undertaken to explore the comprehensive effects of peat soil(PS)and mushroom residue(MR)short-term application on the soil physicochemical properties and nutrient composition of paddy soils,using the potato cultivar'Favorita'as the experimental material.High-throughput amplicon sequencing was utilized to clarify the impact of soil improvement treatments on the structure and function of the root-associated microbiome.Results showed that PS and MR treatments have altered the proportionate distribution of soil aggregates to a certain extent;both treatments also significantly increased soil organic matter content,as well as the levels of available phosphorus and potassium.The soil improvement treatments also enhanced the diversity of the rhizosphere microbial community,with Proteobacteria,Actinobacteria,Bacteroidetes,and Firmicutes being the dominant phyla in both rhizosphere and endophytic regions.Principal coordinate analysis(PCoA)results showed that,compared to bacterial communities,fungal community compositions were relatively stable,and less impact on changes induced by soil amendments.Co-occurrence network analysis revealed that PS treatment resulted in tighter node connections and a more prominent network modularity tendency,especially among the endophytic compartment.Canonical Correspondence Analysis(CCA)indicated that soil organic carbon(TOC)and total nitrogen(TN)significantly influenced the composition of both bacterial and fungal communities.Considering the potato yield results under the combined soil improvement treatments,peat soil amendment appears to be more suitable for the amelioration of paddy field soils and has potential for application.
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