Summary of the metagenomic analysis of golf course turfgrass soil:

• The metagenomic analysis showed a clear difference between the microbial communities in the soil managed with an ecological approach versus those with a conventional approach.

• The soil under ecological management (samples S2 and S3) had a functionally distinct microbiome compared to the conventional soil (sample S1).

• Key microbial genera like Micromonospora, known for breaking down organic matter, were found in higher abundance in the ecologically managed soils.

• Conversely, the genus Sulfuricaulis was strongly associated with the conventional system. This genus is linked to increased sulfur in the soil, which can affect the health of roots and other microorganisms.

• The ecological management promoted metabolic pathways that improve turf health, such as sulfur oxidation and nitrification, which convert locked nutrients into forms that plants can easily absorb.

• The ecological microbiome also produces siderophores. These act as a double agent, making iron and other micronutrients available to the grass while also limiting the growth of harmful fungal and bacterial pathogens.

• The increased osmoprotection pathways in the ecological samples explain the turfgrass’s reported tolerance to water and salinity stress.

• The analysis confirmed that the ecological approach has created a stable and reproducible biological system that helps overcome the challenges of the naturally sandy and alkaline soil.

• The report recommends continuing to add high-quality organic matter, such as compost, to “feed” the beneficial microbial communities.

• This study provides scientific validation for on-field observations, proving that the resilience and health of the turfgrass are a direct result of a diverse and specialized microbial community.