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A Facile and Efficient Approach for the Production of Reversible Disulfide Cross-linked Micelles
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Linking N

Shengjun Xu1,2, Shugeng Feng1,2, Haishu Sun1,2

  • 1Key Laboratory of Environmental Biotechnology , Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , Beijing 100085 , China.

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|September 11, 2018
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Summary

This study shows that Trichoderma viride biofertilizer significantly reduces nitrous oxide (N2O) emissions from agricultural soil. The biofertilizer enhances microbial genes responsible for reducing N2O, mitigating greenhouse gas output.

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Area of Science:

  • Agricultural Science
  • Environmental Microbiology
  • Soil Science

Background:

  • Nitrous oxide (N2O) is a potent greenhouse gas, with significant emissions originating from agricultural fertilizer use.
  • Microbial processes in soil convert fertilizer nitrogen into N2O.
  • The role of biofertilizers and microbial communities in mitigating N2O emissions requires further investigation.

Purpose of the Study:

  • To investigate the impact of Trichoderma viride biofertilizer on N2O emissions in tea plantation soil.
  • To understand the microbial mechanisms underlying N2O reduction by biofertilizers.

Main Methods:

  • A greenhouse pot experiment was conducted using tea plantation soil.
  • N2O emissions were measured following the application of T. viride biofertilizer.
  • Quantitative PCR (qPCR) and high-throughput sequencing were used to analyze key microbial genes (amoA, nirK, nirS, nosZ) involved in nitrogen cycling.

Main Results:

  • T. viride biofertilizer application reduced N2O emissions from fertilized soil by 67.6%.
  • The abundance of nirS and nosZ genes, associated with N2O reduction, increased significantly.
  • Enhanced relative abundance of nosZ-harboring denitrifiers was observed, indicating a greater N2O reduction capacity.

Conclusions:

  • Biofertilizers, specifically T. viride, can effectively mitigate N2O emissions from agroecosystems.
  • T. viride influences microbial nitrogen transformation processes, leading to reduced greenhouse gas output.
  • Targeting microbial communities involved in nitrogen cycling offers a promising strategy for sustainable agriculture.