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Effects of maize straw application on water-soluble organic carbon and fluorescence characteristics of albic soil

  • 0Heilongjiang Academy of Agricultural Sciences, Harbin 150086, China.
Ying Yong Sheng Tai Xue Bao = the Journal of Applied Ecology +

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December 25, 2025

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December 25, 2025

View abstract on PubMed

Summary

This summary is machine-generated.

Maize straw addition significantly boosts water-soluble organic carbon (WSOC) in low-fertility albic soils, enhancing soil fertility and carbon sequestration. This study reveals straw

Area Of Science

  • Soil Science
  • Agricultural Chemistry
  • Environmental Science

Background

  • Albic soils are characterized by low soil organic matter content and low yields.
  • Improving soil organic carbon and fertility is crucial for sustainable agriculture.
  • Maize straw return is a potential strategy for soil amendment.

Purpose Of The Study

  • To investigate the impact of maize straw addition on water-soluble organic carbon (WSOC) content in albic soils.
  • To analyze the changes in WSOC fluorescence characteristics following straw amendment.
  • To evaluate the effects of straw return on soil carbon sequestration and fertility.

Main Methods

  • Addition of maize straw (1% soil mass) to typical and meadow albic soils at 10, 20, and 30 cm depths.
  • Control group with no straw addition.
  • Analysis of WSOC content and fluorescence spectra at 40, 100, and 290 days post-addition.

Main Results

  • Maize straw significantly increased WSOC content in both soil types across all depths, with increases over time.
  • WSOC/SOC ratio decreased, indicating enhanced soil organic carbon stability.
  • Fluorescence analysis showed increased soluble microbial and protein-like substances, and decreased humic acid-like substances, suggesting reduced humification and increased nutrient supply.

Conclusions

  • Maize straw return effectively increases WSOC content in albic soils, contributing to carbon sequestration.
  • Straw amendment promotes the formation of low-molecular-weight fluorescent components, simplifying WSOC structure.
  • The study demonstrates that straw return enhances the nutrient-supplying capacity of albic soils, improving soil fertility.

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