Advances in Sustainable Agricultural Practices: Engineering Hydrothermal Wastewater for Pathogen Control and Seed Viability

Strategic Insights -

Researchers from China Agricultural University have made significant progress in developing a novel method for ensuring the balance between pathogen control and seed viability in sustainable agricultural practices. The study focuses on hydrothermal liquefaction aqueous phase (HTL-AP), a renewable byproduct of biomass processing, which exhibits promising antifungal properties but poses challenges due to its concentration-dependent phytotoxicity. Funded by the National Key Research & Development Program of China, the National Natural Science Foundation of China, and China Agricultural University, the research has been peer-reviewed and published in Water Research.

Key Takeaways:

  • The study emphasizes the critical need for a balance between pathogen control and seed viability in sustainable agricultural practices, highlighting the challenges posed by hydrothermal liquefaction aqueous phase (HTL-AP).
  • The researchers developed a customized disinfection protocol tailored to different seeds, including adjustments of HTL-AP concentration, exposure time, and wash post-treatment, to achieve the optimal trade-off between pathogen control and seed viability.
  • The multifaceted disinfection mechanisms of HTL-AP, including cell membrane disruption, metabolic pathways interference, and enzyme system damage, were discussed in detail.
  • The study underscores the significance of a customized strategy in both pathogen reduction and the promotion of plant health.
  • The research advances sustainable agricultural practices and bolsters global food security by engineering a renewable HTL-AP reagent.

Statistics:

  • The researchers achieved complete inhibition of fungal growth using HTL-AP at a concentration of 4.8%.
  • Seed viability was negatively impacted by HTL-AP at low dilution ratios (i.e., x 1, x 2).
  • The study involved the use of wheat and cabbage seeds contaminated with pathogenic fungi as representative crop seeds.
  • The researchers employed a customized protocol involving adjusts of HTL-AP concentration, exposure time, and wash post-treatment to achieve the optimal trade-off between pathogen control and seed viability.

Sources:

  • Water Research, 2025; 281.
  • Pergamon-elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England.
  • Elsevier - www.elsevier.com; Water Research - www.journals.elsevier.com/water-research/
  • China Agricultural University, College of Water Resources & Civil Engineering, Lab Environm Enhancing Energy E2E, Key Lab Agr Engn Struct & Environm, Minist Agr & Ru, Beijing 100083, People's Republic of China.