Activated ZnCl2 biochar and humic acid as additives in monoammonium phosphate fertilizer: Physicochemical characterization and agronomic effectiveness.

Autor: Almeida Leite MC; Department of Soil Science, Universidade de São Paulo, Piracicaba, Brazil. Electronic address: cunhamauricio@usp.br., Ballotin FC; Department of Soil Science, Universidade Federal de Viçosa, Viçosa, Brazil., Lustosa Filho JF; Department of Soil Science, Universidade Federal de Viçosa, Viçosa, Brazil., Santos WO; Institute of Agricultural Sciences, Universidade Federal de Uberlândia, Uberlândia, Brazil., Matias PC; Department of Soil Science, Universidade Federal de Viçosa, Viçosa, Brazil., Pogorzelski D; Department of Soil Science, Universidade Federal de Viçosa, Viçosa, Brazil., Vergutz L; AgroBiosciences Program, Mohammed VI Polytechnic University (UM6P), Ben Guerir, Morocco., Mattiello EM; Department of Soil Science, Universidade Federal de Viçosa, Viçosa, Brazil.
Jazyk: angličtina
Zdroj: Environmental research [Environ Res] 2023 Sep 01; Vol. 232, pp. 115927. Date of Electronic Publication: 2023 Apr 21.
DOI: 10.1016/j.envres.2023.115927
Abstrakt: Activated zinc biochar (ZnBC) and humic acid (HA) were used as coating agents in a soluble monoammonium phosphate (MAP) to modify phosphorus (P) use efficiency by altering adsorption/desorption kinetics between the granule region and the soil. The coated treatments MAPZnBC and MAPHA were compared with MAP through P diffusivity, kinetics, and agronomic evaluation. Eucalyptus sawdust was used as biomass for biochar synthesis, and a pre-pyrolysis treatment with zinc chloride (ZnCl 2 ) was applied. The P diffusivity was evaluated in the fertosphere zone. Adsorption and desorption potential of the ZnBC compared with control biochar (BC) was evaluated separately. Desorption kinetics of P from soil was assessed after incubation with MAPZnBC and MAPHA. The shoot dry matter yield (SDM), P uptake, and P use efficiency (PUE) were evaluated with a pot experiment in a clay Oxisol sown with maize and soybeans as successive plant trials, under glasshouse conditions. Surface area values of 940 and 305 m 2  g -1 combined with adsorption capacities of 106 and 53 mg P g -1 for ZnBC and BC, respectively, confirm the increased capacity of activated biochar to adsorb P. Both MAPZnBC and MAPHA decreased P diffusivity compared to MAP after 20 days of incubation. Moreover, MAPZnBC and MAPHA presented 20% and 34% more water-soluble phosphorus recovery. MAPZnBC expressed an increase in SDM while MAPHA highlighted P uptake and PUE compared with MAP. Both kinetic studies and agronomic evaluations showed that ZnBC and HA are suitable as coatings for phosphate fertilizers in terms of increasing P efficiency in the fertosphere on high P-fixing soils.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: