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Updated: Jan 27, 2026

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Assessment of Multiorigin Humin Components Evolution and Influencing Factors During Composting.

Xinyu Xie1, Xintong Gao1, Chaonan Pan1

  • 1College of Life Science , Northeast Agricultural University , Harbin 150030 , China.

Journal of Agricultural and Food Chemistry
|March 26, 2019
PubMed
Summary

The structural evolution of humin (HM) differs significantly between livestock manure (LMC) and straw waste (SWC) composting. Understanding these humic substance changes is crucial for agricultural waste management and environmental impact assessment.

Keywords:
2D-COSEEM-PARAFACSEMhuminlivestock manure compostingstraw waste composting

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Area of Science:

  • Environmental Science
  • Soil Science
  • Biochemistry

Background:

  • Humin (HM) is a complex soil organic matter component with poorly understood structural evolution during composting.
  • Agricultural waste composting, particularly livestock manure (LMC) and straw wastes (SWC), is a key process for nutrient cycling and waste management.
  • Understanding HM structural changes is vital for assessing its environmental fate, features, and impacts.

Purpose of the Study:

  • To elucidate and compare the structural evolution of humin during livestock manure and straw waste composting.
  • To investigate the differences in humic substance formation and transformation pathways.
  • To demonstrate the utility of an integrated spectroscopic and modeling approach for studying complex environmental processes.

Main Methods:

  • Excitation Emission Matrix-Parallel Factor Analysis (EEM-PARAFAC) to characterize humin components.
  • Two-dimensional correlation spectroscopy (2D-CoS) and hetero-2DCoS for analyzing spectral changes.
  • Structural Equation Modeling (SEM) to integrate spectroscopic data and understand causal relationships.
  • Extraction and characterization of humin from composting materials.

Main Results:

  • A three-component EEM-PARAFAC model effectively characterized humin in both LMC and SWC.
  • Significant differences in humin evolution were observed between LMC and SWC.
  • Opposite trends and varying sequences in the changes of humin fluorescent components were identified, indicating distinct formation and evolution mechanisms.
  • Diverse organic matter composition and microbial communities likely drive these divergent evolution pathways.

Conclusions:

  • The study reveals distinct structural evolution pathways for humin in LMC and SWC composting.
  • An integrated analytical approach provides a comprehensive understanding of humin component changes.
  • The findings contribute to better management of agricultural wastes and understanding of humic substance dynamics in the environment.