Study on the combined improvement of saline-alkali soil by ST-PGPR and organic materials

The synergistic application of a salt-tolerant plant growth-promoting rhizobacteria consortium combined with optimized organic amendments (biochar and organic fertilizer) significantly improved the remediation of saline-alkali soils and promoted wheat growth. This synergistic system not only enhanced soil chemical properties but also improved key soil enzyme activities related to nutrient cycling and stress mitigation. Additionally, microbial community structure analysis revealed a shift in the microbial community, with an enhanced bacterial network structure. In terms of promoting wheat growth, the synergistic system significantly increased plant height, root length, and fresh weight, while reducing oxidative stress and improving photosynthetic capacity. This study highlights the potential of the combined microbial and organic amendment system as an effective and scalable strategy for soil restoration and sustainable agricultural practices in saline-affected areas.