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Related Experiment Video

Updated: Jan 19, 2026

Isolation and Analysis of Microbial Communities in Soil, Rhizosphere, and Roots in Perennial Grass Experiments
10:31

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Published on: July 24, 2018

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Long-term decomposed straw return positively affects the soil microbial community.

Y Su1, J L Lv2, M Yu1

  • 1Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China.

Journal of Applied Microbiology
|September 9, 2019
PubMed
Summary

Long-term decomposed straw return enhances soil microbial communities, increasing bacteria and fungi abundance. This practice promotes soil health by improving nutrients and salinity, reducing disease risk compared to fresh straw.

Keywords:
decomposed strawfresh strawsoil bacterial communitysoil fungal communitystraw return

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Area of Science:

  • Soil Science
  • Microbiology
  • Agronomy

Background:

  • Understanding the long-term effects of agricultural practices on soil ecosystems is crucial for sustainable farming.
  • Straw return is a common practice, but the impact of decomposed versus fresh straw on soil microbial communities requires detailed investigation.

Purpose of the Study:

  • To investigate the modifications in soil microbial community structure and composition induced by over 10 years of fresh and decomposed straw return.
  • To identify key environmental factors influencing these microbial community variations.

Main Methods:

  • Utilized phospholipid fatty acid analysis and high-throughput sequencing to analyze soil microbial community structure and composition.
  • Compared microbial responses to different application rates of fresh and decomposed straw (~3750 and ~7500 kg ha⁻¹).

Main Results:

  • Decomposed straw return significantly increased the relative abundance of bacteria and fungi compared to fresh straw, with effects varying by application rate.
  • Observed an increase in bacteria related to nitrification and a decrease in those related to denitrification, leading to higher soil total nitrogen.
  • Reduced pathogenic fungal populations (Alternaria) and showed a positive correlation between decomposed straw return, soil electric conductivity, and reduced soil-borne disease risk.

Conclusions:

  • Long-term decomposed straw return promotes healthier soil microbial communities in terms of abundance and structure compared to fresh straw.
  • Decomposed straw provides suitable nutrients and salinity, contributing to improved soil health and reduced risk of soil-borne diseases.
  • Identifying key factors influencing microbial variation is vital for effective soil health management strategies involving straw return.