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Phosphorus source driving the soil microbial interactions and improving sugarcane development.

Thiago Gumiere1, Alain N Rousseau2, Diogo Paes da Costa3

  • 1Department of Soil Science, Luiz de Queiroz College of Agriculture, University of São Paulo, ESALQ/USP, Av. Pádua Dias, 11, CP 09, 13418-900, Piracicaba, São Paulo, Brazil. thiago.gumiere@gmail.com.

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Different phosphate sources impact soil microbial communities and sugarcane growth. High P2O5 sources boosted bacterial interactions while decreasing fungal ones, with Bayovar rock phosphate yielding the most dry matter.

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Area of Science:

  • Agricultural Science
  • Soil Microbiology
  • Plant Nutrition

Background:

  • Global phosphate demand is rising, straining reserves.
  • Arbuscular mycorrhizal fungi (AMF) can enhance phosphorus-use efficiency.
  • The influence of phosphorus sources on soil microbial interactions is not well understood.

Purpose of the Study:

  • To investigate the relationship between sugarcane dry matter and soil microbial community interactions.
  • To assess the effects of different phosphate sources (Simple Superphosphate, Catalão rock phosphate, Bayovar rock phosphate) with and without AMF inoculation.

Main Methods:

  • Evaluated sugarcane total dry matter content under various phosphate sources.
  • Analyzed soil microbial community structure and interactions.
  • Compared results with and without arbuscular mycorrhizal fungi (AMF) inoculation.

Main Results:

  • Bayovar rock phosphate (14% P2O5) resulted in the highest total sugarcane dry matter.
  • Phosphate source significantly affected total dry matter and soil microbial community structure.
  • High P2O5 sources increased bacterial interactions and decreased fungal interactions.

Conclusions:

  • Soil microbial interactions, particularly the balance between bacterial and fungal communities, correlate with sugarcane yield.
  • Soil microbial interactions can serve as an indicator for optimizing agricultural management and phosphorus fertilization strategies.