Effects of intercropped trees on the structure and function of soil fungal communities in tea gardens

Subjects: Biology >> Botany >> Applied botany submitted time 2024-08-08 Cooperative journals: 《广西植物》

LIU Wei WEI Yiwei DU Jinbao ZHANG Yongrui bHUANG Shuangjie WANG Liyan SUN Mufang

Abstract： To explore the impact of different intercropped trees on fungal communities in tea garden soils in southern Henan, the study took the tea garden soils intercropped with Castanea mollissima, C. seguinii and Cunninghamia lanceolata in Xinyang, Henan as the test objects. It used indoor chemical experiments and high-throughput sequencing technology to analyze the chemical properties of tea garden soil, fungal community structure and their relationship with soil nutrients under different intercropping patterns. The results were as follows: (1) The fungal species abundance and diversity in the tea garden soil intercropped with Castanea seguinii and Cunninghamia lanceolata were significantly higher than those intercropped with Castanea mollissima, and there were significant differences in fungal community composition among the three. (2) In terms of fungal community structure, the tea gardens intercropped with C. seguinii and Cunninghamia lanceolata exhibited high similarity. Further analysis revealed that Basidiomycota and Ascomycota were the main fungal phyla in the soil of the three intercropped tea gardens. Among them, the relative abundance of Basidiomycota was higher in the tea garden soil intercropped with Castanea mollissima and Cunninghamia lanceolata, while Ascomycota dominated in the tea garden intercropped with Castanea seguinii. At the genus level, the relative abundance of Russula and Mortierella in the tea garden soil intercropped with Castanea mollissima was significantly higher than the other two intercropping types. (3) The study also found a significant correlation between the chemical properties of the tea garden soil and the fungal community structure. There were significant differences in nitrate nitrogen and available phosphorus contents in the soil of tea gardens intercropped with different trees, which further influenced the distribution and structure of the fungal community. (4) In terms of fungal trophic types, the soil fungi in the tea gardens intercropped with Castanea mollissima and Cunninghamia lanceolata were dominated by ectomycorrhizal fungi, while those in the tea garden intercropped with Castanea seguinii were primarily undefined saprotrophic fungi. In summary, significant differences exist in the composition, diversity, and functions of fungal communities in the soil of tea gardens intercropped with Castanea mollissima, C. seguinii, and Cunninghamia lanceolata in southern Henan. These findings provide scientific evidence for the selection of intercropped tree species in tea gardens, contributing to the optimization of the ecological environment and the improvement of tea quality.

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