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Intercropping enhances microbial community diversity and ecosystem functioning in maize fields.

Xiwen Xiao1, Lei Han1, Hongri Chen1

  • 1College of Resources and Environment, Hunan Agricultural University, Changsha, China.

Frontiers in Microbiology
|January 23, 2023
PubMed
Summary
This summary is machine-generated.

Intercropping enhances soil health by boosting microbial diversity and ecosystem functions like enzyme activity. This planting method promotes soil aggregates and microbial biomass, contributing to sustainable agriculture.

Keywords:
bacterial and fungal diversityecosystem functionseffect size (effect magnitude)intercroppingsoil properties

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Area of Science:

  • Agricultural Science
  • Soil Science
  • Microbiology

Background:

  • Intercropping is a common agricultural practice with potential impacts on soil properties and crop yields.
  • The effects of intercropping on soil microbial diversity, ecosystem functioning, and overall soil sustainability require further investigation.

Purpose of the Study:

  • To investigate the impact of intercropping maize with sesame, peanut, soybean, and sweet potato on soil microbial diversity and ecosystem functions.
  • To quantify the effects of intercropping on soil physicochemical properties, microbial biomass, and enzyme activities compared to maize monocropping.

Main Methods:

  • Field experiments were conducted comparing monocropping with four intercropping systems.
  • Soil microbial community diversity, microbial biomass, and enzyme activities (urease, phosphatase, catalase) were analyzed.
  • Effect sizes (Cohen d) were calculated to quantify intercropping impacts on microbial diversity and ecosystem functions.

Main Results:

  • Intercropping significantly increased soil aggregates (2-0.25 mm grain size).
  • Consistent improvements were observed in ecosystem functions, including elevated enzyme activities and increased soil microbial biomass carbon and nitrogen.
  • Bacterial richness significantly increased, particularly in maize/peanut intercropping, and was linked to microbial diversity and ecological clusters.

Conclusions:

  • Intercropping positively influences soil physicochemical properties, ecosystem functions, and microbial community diversity.
  • Microbial diversity within ecological clusters plays a crucial role in maintaining ecosystem functioning under intercropping systems.
  • Findings provide insights for understanding intercropping systems and guiding agricultural practices for improved soil health.