Soil microbial community construction under revegetation in newly created land

Area of Science:

• Soil Science
• Ecology
• Microbiology

Background:

• Revegetation is key for Loess Plateau restoration.
• Soil microorganisms indicate ecological health.
• Five vegetation types were studied: Medicago sativa (MX), Trifolium repens (BSY), Festuca arundinacea (GYM), Elymus dahuricus (PJC), and natural grass (CK).

Purpose of the Study:

• To analyze soil microbial community composition, function, and co-occurrence patterns under different vegetation types.
• To assess the impact of revegetation on soil microbial indicators.
• To provide a theoretical basis for ecological restoration on the Loess Plateau.

Main Methods:

• Comparative analysis of soil microbial communities (composition, function, co-occurrence) across five vegetation treatments.
• Correlation analysis between microbial communities and soil properties (OM, BD, sand).
• Network analysis to understand microbial interactions and community structure.

Main Results:

• Microbial community composition was similar across vegetation types, but abundance varied.
• Soil bulk density (BD) strongly correlated with microbial communities (P < 0.001).
• Trifolium repens (BSY) showed high bacterial gene functions, while Elymus dahuricus (PJC) showed high fungal gene functions. Microbial networks exhibited small-world and modular structures.

Conclusions:

• Raw grass cultivation significantly alters soil microbial community structure and function.
• Understanding microbial responses to vegetation is crucial for effective ecological restoration.
• This study offers insights into microbial assembly and provides a foundation for future Loess Plateau restoration strategies.