Cited by 221Polymer-Based Agricultural EnhancementsMicroencapsulation and Drying ProcessesSoil Carbon and Nitrogen Dynamics

Evaluation of biodegradable polymers as encapsulating agents for the development of a urea controlled-release fertilizer using biochar as support material

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González, M.E., Cea, M., Medina, J., González, A., Diez, M.C., Cartes, P., Monreal, C., Navia, R.·2015·Science of The Total Environment

Abstract

Biochar constitutes a promising support material for the formulation of controlled-release fertilizers (CRFs). In this study we evaluated the effect of different polymeric materials as encapsulating agents to control nitrogen (N) leaching from biochar based CRFs. Nitrogen impregnation onto biochar was performed in a batch reactor using urea as N source. The resulting product was encapsulated by using sodium alginate (SA), cellulose acetate (CA) and ethyl cellulose (EC). Leaching potential was studied in planted and unplanted soil columns, monitoring nitrate, nitrite, ammonium and urea concentrations. After 90 days, plants were removed from the soil columns and plant yield was evaluated. It was observed that the ammonium concentration in leachates presented a maximum concentration for all treatments at day 22. The highest concentration of N in the leachates was the nitrate form. The crop yield was negatively affected by all developed CRFs using biochar compared with the traditional fertilization.

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Crossref · 10.1016/j.scitotenv.2014.10.014

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Authors
González, M. E., Cea, M., Medina, J., González, A., Diez, M. C., Cartes, P., Monreal, C., & Navia, R.
Affiliations
  • Universidad de La Frontera (CL)
  • Universidad Católica de Temuco (CL)
  • Agriculture and Agri-Food Canada (CA)
Corresponding author
González, M.E.
Venue
Science of The Total Environment
Publisher
Elsevier BV
Published
2015-02
Volume
505
Pages
446-453
ISSN
0048-9697 (ISSN-L)
OpenAlex
W1966559295
Cited by
221
References
33
Citations by year
2026: 17 · 2025: 23 · 2024: 27 · 2023: 25 · 2022: 29 · 2021: 26 · 2020: 23 · 2019: 23 · 2018: 7 · 2017: 11 · 2016: 6 · 2015: 3
FWCI
3.46
Type
journal article
Language
en
Open access
Locations
  • The Science of The Total Environment (publishedVersion)
  • PubMed (publishedVersion)
  • Omeka S (Universidad de La Frontera) (submittedVersion, cc-by-nc-nd)
Funders
CONICYT-Chile (D07I1096)
Topics
  • Physical Sciences › Engineering › Biomedical Engineering › Polymer-Based Agricultural Enhancements
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Microencapsulation and Drying Processes
  • Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Carbon and Nitrogen Dynamics
Keywords
slow-release fertilizer, biochar, urea, encapsulating agents, biodegradable polymers, sodium alginate, cellulose acetate, ethyl cellulose, nitrogen leaching, nitrate, ammonium, plant yield
MeSH terms
Biodegradation, Environmental, Charcoal, Delayed-Action Preparations, Fertilizers, Polymers, Urea

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