Allelopathic Effect of Osmanthus fragrans Changes the Soil Microbial Community and Increases the Soil Nutrients and the Aroma Quality of Tea Leaves

作者：Yuxin Zhao, Junyi Zhou, Lingli Chen, Song Li, Yue Yin, Anburaj Jeyaraj, Shujing Liu, Jing Zhuang, Yuhua Wang, Xuan Chen, Xinghui Li · 发表于：Journal of Agricultural and Food Chemistry · 年份：2025 · DOI：10.1021/acs.jafc.5c03692 · 被引用次数：5 · 研究领域：Allelopathy and phytotoxic interactions、Agriculture, Soil, Plant Science、Weed Control and Herbicide Applications

Intercropping is a sustainable agricultural practice that promotes the growth of tea plants. However, research on the effects of intercropping with aromatic plants on the soil environment and tea aroma quality remains limited. In this study, we conducted both greenhouse and field experiments to investigate the allelopathic effect of Osmanthus fragrans on soil properties, the soil microbial community, and tea aroma quality. The treatment with O. fragrans leaf litter or intercropping significantly increased soil pH and ammonium nitrogen content and changed soil enzyme activities. Both treatments enhanced the bacterial richness in rhizosphere soil and altered microbial communities, particularly increasing the relative and absolute abundance of beneficial Bacillus . The allelopathic effect of O. fragrans improved tea aroma quality, with five key volatile compounds (linalool oxide II, linalool, nonanal, methyl salicylate, and geraniol) consistently identified in both greenhouse and field treatments. Network analysis demonstrated that our treatments enhanced the correlation between soil bacterial communities and five volatile compounds in tea leaves. These findings provide a theoretical foundation for improving soil health and tea aroma in tea plantations.