Concerns
about the environmental and economic impacts of agrochemical
usage highlighted the importance of enhanced efficiency fertilizer
materials to achieve the 2030 agenda for sustainable development.
Therefore, we melt-processed a macro/micronutrient mono and multicomponent
material based on poly(vinyl alcohol), KNO3, and starch/micronutrient
(Mn, Fe, and Cu) microspheres. The Multimaterial presented a release
reduction of 50 and 60% to K+ and NO3
–, respectively, compared to the Macromaterial, due to the external
PVA layer, relaxation process, nutrient diffusion decrease, and ion
competition (the presence of the micronutrient). In the soil release,
the initial burst release occurred 12 days earlier for Multi and commercial
material Basacote compared with the Macromaterial due to the presence
of micronutrients. However, after 80 days of nutrient release in the
soil, the materials still presented nutrients in the composition as
determined by XRD, FTIR, and SEM-EDS analysis. Also, SEM images of
the surface showed signs of deterioration, confirming their biodegradation
potential over time and a similar release profile to the commercial
material.
Desenvolvimento de materiais contendo macro e micronutrientes para liberação programada: uma agricultura sustentávelPirassununga Bascote® e Multi/M, pois interagiam pouco com a matriz de solo, comparado com a formulação Macro. A formulação Multi/M apresentou perfil de liberação semelhante 8 ao material comercial Basacote®, o que demostra a potencialidade do material para a aplicação como EEFs, além de ser à base de materiais que possuem potencial de biodegradação.
Este é um artigo de acesso aberto distribuído sob os termos da Licença de Atribuição Creative Commons Ensino dE Química para o dEsEnvolvimEnto sustEntávEl
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