How Organic Mulching Influences the Soil Bacterial Community Structure and Function in Urban Forests

Area of Science:

• Soil Science
• Microbiology
• Urban Ecology

Background:

• Urban forest soils face disturbance from human activities.
• The impact of organic mulching on urban forest soil bacterial communities remains understudied.

Purpose of the Study:

• To investigate the effects of organic mulching on urban forest soil bacterial community structure and function.
• To identify key soil physicochemical properties influenced by mulching.

Main Methods:

• Incubation experiment with four treatments: no mulch (CK), wood chips (Mw), wood compost (Mc), and layered wood chips/compost (Mw+c).
• Analysis of soil physicochemical properties and bacterial community structure.

Main Results:

• Organic mulching significantly altered soil physicochemical properties.
• Mulching treatments led to significant changes in soil bacterial community structure.
• Soil organic carbon, total nitrogen, and C:N ratio were key factors influencing microbial communities.
• Bacterial groups primarily engaged in carbon (C) and nitrogen (N) cycling.

Conclusions:

• Organic mulching can effectively modify urban forest soil bacterial communities.
• Mulching supports the development of soil bacteria, crucial for C and N cycling.
• Provides a theoretical basis for improving urban forest soil microbiology.