Humic Acid Effects on Microbial Community Structure and Function in Salvia miltiorrhiza Rhizosphere Soil

The sustainability of Salvia miltiorrhiza monoculture is challenged by the deterioration of soil micro-ecosystems and the imbalance of nutrient cycles. Humic acid (HA) is a promising soil amendment, yet a deep, mechanistic understanding of its role as a catalyst for microbial-mediated nutrient cycling is lacking. Our study goes beyond conventional analysis by leveraging rhizosphere metagenomics to uncover how HA reprograms the microbial community's structure and functional gene repertoire. This enables us to reveal the regulatory microbe-nutrient network through which HA boosts soil fertility and plant performance.

丹参（Salvia miltiorrhiza）连作的可持续性正面临土壤微生态系统退化与养分循环失衡的严峻挑战。腐殖酸（Humic acid, HA）是一种极具应用前景的土壤改良剂，但目前对其作为微生物介导养分循环催化剂的深层作用机制仍缺乏透彻的机理认知。本研究突破传统分析范式，借助根际宏基因组学（rhizosphere metagenomics）技术，揭示了腐殖酸如何重塑微生物群落结构与功能基因谱。借此我们得以阐明腐殖酸提升土壤肥力、改善植物生长性能的调控性微生物-养分网络。