Summer Rice–Winter Potato Rotation Suppresses Various Soil-Borne Plant Fungal Pathogens

Growing potatoes (Solanum tuberosum) using the idle rice fields in Southern China and Indo-Gangetic Plains of India winter season through rice–potato rotation (RC) system could support future food security. However, modulation capacity RC on soilborne fungal pathogens is still unclear. In current study, a pot experiment was designed conducted to monitor dynamics soil community composition between potato monoculture (CC) system, where two systems were set with same conditions: autoclaving fertilization; without autoclave-free fertilization. Then, uncultivated (CK) root-zone samples conditions under collected, then physiochemical properties enzymatic activities determined. Next, high-variable region (V5–V7) 18S rRNA genes amplified sequenced PCR technique Illumina Miseq platform, respectively. Finally, species diversity composition, as well relative abundance annotated against Fungiuld database samples, also investigated. The results showed that significantly (p < 0.05) increase decrease pathogens, suppress 23 cultivating during summer 93.75% remaining winter-season cultivation. Seven-eighths have lower pathogenic MGIDI indices (6.38 7.82) than those CC (7.62 9.63). Notably, both cultivation planting reduced strain ASV24 Colletotrichum genus. bipartite network non-pathogens members be restricted co-occurring non-pathogenic crops season. redundancy analysis (RDA) indicated pH, electronic conductivity, available phosphorus content, various enzyme (cellulase, urease, sucrase, acid phosphatase, catalase, polyphenol oxidase) indicators pathogens. This demonstrated outperformed suppressing community.