Addressing the issue of landscape degradation in residential communities, this study proposes a synergistic technology combining “in-situ soil reconstruction from stripped turf” with “microbial remediation,” and evaluates its ecological benefits. The core of the technology involves soil reconstruction based on stripped degraded turf and the enhanced application of microbial remediation techniques, including the regulation of PAH degradation by the nah gene cluster of Pseudomonas and the mediation of heavy metal sulfide fixation by the dser gene of sulfate-reducing bacteria. Using a mixture of multifunctional organic fertilizer (POM), grass sod stripping material (GS), and topsoil (TS), pot experiments showed that a POM 15% + GS 30% ratio achieved a peak effective phosphorus content of 4.48 mg/kg. Ecological benefit assessments showed that after 12 months of applying this technology in a residential community, the vegetation cover structure underwent a fundamental reversal. The proportion of high-cover areas (≥75%) increased from 4.6% to 64.61%, a 13-fold increase, while the proportion of low-cover areas (<30%) decreased from 38.15% to 3.15%, a 92% reduction. The entropy-based assessment system identified water conservation (weighting 0.218) and carbon sequestration and oxygen release (weighting 0.223) as key indicators. The ESFI value for Group A, which applied the soil reconstruction + microbial remediation technology using turf stripping, reached 0.88, an increase of 62.96% compared to pre-remediation levels, significantly higher than the 0.71 for the traditional technology Group B. Group A's soil nutrient index (SNI) increased by 123.64%, synergistically promoting vegetation productivity (+183.07%) and carbon sequestration (+171.07%).
