Silkworm sand-based bio-organic fertilizers reshape rhizosphere microbiomes and modulate soil chemistry for sustainable management of Myrica rubra decline

文献类型： 外文期刊

第一作者： Hong, Leidong

作者： Hong, Leidong;Hong, Chunlai;Zhu, Weijing;Zhu, Fengxiang;Wang, Weiping;Zhang, Tao;Guo, Rui;Qi, Xingjiang;Yao, Yanlai;Qi, Xingjiang;Yao, Yanlai;Zou, Xiuqin

作者机构：

关键词： Chinese bayberry; Rhizosphere microbiome; Bio-organic fertilizer; Soil health; Co-occurrence network analysis

期刊名称：PLANT AND SOIL （ 影响因子：4.1； 五年影响因子：4.7 ）

ISSN： 0032-079X

年卷期： 2025 年

页码：

收录情况： SCI

摘要： Background and aims Myrica rubra plantations exhibit growth decline syndrome involving fruit overloading, yield/quality reduction, and soil degradation While bio-organic fertilizers (BOFs) offer sustainable management potential, their effects on rhizosphere microbiome-soil-plant interactions during decline remain unclear. Methods Three silkworm sand-based BOFs were applied to decline trees. We analyzed rhizosphere microbiome dynamics (high-throughput sequencing and co-occurrence networks), soil properties, phytohormones, and fruit traits (weight and soluble solids). Statistical integration (Pearson's correlation, random forest modeling) was conducted to identify key drivers of microbiome-soil-plant responses. Results BOFs significantly enhanced rhizosphere microbial alpha-diversity (P < 0.01) and enriched plant-beneficial taxa (e.g., Acidothemus, Frankiales, and Burkholderiales). Microbial networks showed reduced complexity but enhanced stability via increased negative interactions. Soil physicochemical properties were also improved, including elevated pH and phosphorus/potassium availability. These shifts correlated with plant recovery: upregulated phytohormones (salicylic acid, indole-3-acetic acid, jasmonic acid; P < 0.05), increased fruit weight (1.8-4.2 g) and soluble solids (1.6-1.8%). Statistical analysis indicated negative associations between soil pH and available nitrogen/phosphorus, all of which are key drivers of rhizosphere microbiome shifts in decline trees treated with BOFs. Moreover, microbial community shifts were associated with phytohormones-mediated plant recovery and fruit traits enhancement. Conclusions BOFs mitigate M. rubra decline by restructuring rhizosphere microbiomes toward stable, functional communities and improving soil properties (pH and available P/K elevation). These coordinated changes optimize microbiome-soil-plant interactions, thereby contributing to increased phytohormone-mediated plant recovery and quantifiable fruit quality improvement. This advances our understanding of BOF-driven decline mitigation and provides a sustainable management strategy.

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