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Related Experiment Video

Updated: Apr 15, 2026

Isolation and Analysis of Microbial Communities in Soil, Rhizosphere, and Roots in Perennial Grass Experiments
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Five-year fertilization alters soil microbial composition and functionality in sandy grassland.

Rui Zhang1,2,3,4, Yulin Li1,3, Xueyong Zhao1,2

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Summary

Reclaiming sandy grasslands with fertilizers like manure boosts aboveground biomass and carbon cycling microbes. However, it may reduce nitrogen-cycling microbes, potentially risking grassland degradation.

Keywords:
C cyclingN cyclingcommunity compositionenvironmental factorssoil microbiome

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Area of Science:

  • Soil Science
  • Microbiology
  • Ecology

Background:

  • Impacts of sandy grassland reclamation and fertilization on soil microbial communities and carbon (C) and nitrogen (N) cycling are poorly understood.
  • Understanding these impacts is crucial for predicting soil C sequestration and nutrient availability.

Purpose of the Study:

  • To investigate the effects of different fertilizers on soil microbial communities and functional groups in reclaimed sandy grasslands.
  • To assess the influence of reclamation and fertilization on soil properties, aboveground biomass (AGB), and C and N cycling.

Main Methods:

  • Three fertilizer types (chemical fertilizer, manure, combined) were applied to reclaimed sandy cropland for five years.
  • Soil microbial communities, soil properties, and AGB were analyzed in fertilized plots and a control (unfertilized grassland).

Main Results:

  • Reclamation and fertilization significantly increased AGB, with the combined fertilizer yielding the greatest biomass.
  • Fertilization enhanced C cycle functional groups by improving soil properties and increasing specific microbial abundances.
  • Fertilization negatively impacted N cycle functional groups by decreasing the abundance of certain bacterial phyla.

Conclusions:

  • Reclamation and fertilization alter soil microbial communities and C/N cycling functions in sandy grasslands.
  • While beneficial for biomass and C sequestration, fertilization poses a risk to N availability and grassland health.
  • Management strategies should consider the complex microbial responses to prevent potential grassland degradation.