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Evaluation of biodegradable polymers as encapsulating agents for the development of a urea controlled-release fertilizer using biochar as support material
Open accessAbstract
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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“The lowest N-leaching-loss were observed with BSRFs, and the phenomenon was attributed to the fact that BSRFs had better slow-release characteristics and water holding capacity than normal biochar (Gonzalez et al., 2015; Wen et al., 2017).”
From A review on biochar modulated soil condition improvements and nutrient dynamics concerning crop yields: Pathways to climate change mitigation and global food security (2019) · cites this paper as Gonzalez et al., 2015
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Metadata
- 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
- green
- repositorio.ufro.cl
- Licence
- cc-by-nc-nd
- www.elsevier.com/tdm/userlicense/1.0/ (tdm)
- 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
- Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › 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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