Biochar addition to organo-mineral fertilisers delays nutrient leaching and enhances barley nutrient content
Llovet Martin, Alba (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Vidal Durà, Andrea (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)
Alcañiz, Josep M (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Ribas Artola, Àngela (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Domene, Xavier (Centre de Recerca Ecològica i d'Aplicacions Forestals)

Data:	2023
Descripció:	15 pàg.
Resum:	Biochar, a carbon-rich solid produced from biomass pyrolysis, has attracted growing interest as a fertiliser ingredient due to its ability to non-permanently retain nutrients. A greenhouse pot experiment was set up to compare three commercial organo-mineral fertiliser formulations (NPK, NP and K) with the corresponding formulations containing a slow-pyrolysis wood biochar (NPK+B, NP+B and K+B) (6 replications each). Nutrient leaching as well as crop growth and nutrient uptake was monitored using barley as model species. Nutrient leaching was slowed down in the NPK+B compared to the NPK fertiliser. The most responsive ions were nitrate and potassium, whose leaching during the two first weeks was reduced by 28% and 22%, respectively, while this trend reversed from the third week on. One plausible explanation would be a microbial nutrient immobilisation mediated by the concurrent NPK and biochar habitat provision. NPK+B significantly enhanced barley straw biomass (23. 43% increase respect to NPK), whereas all the biochar-based fertilisers showed increases in nutrient content and export (involving potassium, sulphur, calcium and manganese), possibly indicating that biochar acted as a nutrient source. These results provide some evidence of the potential use of the studied biochar in biochar-based fertilisers to meet nutrient availability with plant demands.
Ajuts:	Ministerio de Economía y Competitividad AGL2015-70393-R
Drets:	Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.
Llengua:	Anglès
Document:	Article ; recerca ; Versió sotmesa a revisió
Matèria:	Barley ; Biochar-based fertilisers ; Crop growth ; Nutrient content ; Nutrient leaching
Publicat a:	Archives of Agronomy and Soil Science, Vol. 69, issue 13 (2023) , p. 2537-2551, ISSN 1476-3567

DOI: 10.1080/03650340.2022.2161092

Preprint 50 p, 1.6 MB

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