Soil Microbial Communities Responses to Multiple Generations’ Successive Planting of <i>Eucalyptus</i> Trees

Abstract

The impacts of the successive planting of Eucalyptus on soil microbial communities and their underlying mechanisms remain unknown, limiting our understanding of its long-term effects on soil ecosystems. This study examined the 0–20 cm and 20–40 cm soil layers, investigating changes in soil bacterial and fungal communities after multiple plantings of Eucalyptus grandis × urophylla using high-throughput sequencing. Furthermore, we used the structural equation model (SEM) to analyze the relationships among soil active organic carbon (SAOC), enzyme activity, and microbial diversity. The study showed that the multigeneration successive planting of Eucalyptus significantly increased the soil bulk density and decreased the soil physicochemical properties and soil enzyme activities (p p p Eucalyptus on soil microbial community structure and suggests adjustments in forestry practices to mitigate soil degradation.

Keywords

• pure <i>Eucalyptus</i>
• multigeneration successive planting
• soil microorganisms
• soil organic carbon
• enzyme activity
• structural equation modeling