Cellulose Microbeads: Toward the Controlled Release of Nutrients to Plants

Autor(es)

Feresin Gomes, Marcos Henrique ; Callaghan, Ciaran ; Sipano Mendes, Antonio Cesar ; Edler, Karen J. ; Mattia, Davide ; de Jong van Lier, Quirijn ; Pereira de Carvalho, Hudson Wallace

• Tipo de documento: Artigo Científico
• Fonte: ACS AGRICULTURAL SCIENCE & TECHNOLOGY; v. 2, n. 2, p. 9-pg., 2022-04-18.

Resumo

The use of conventional fertilizers is associated with pollution due to leaching and a mismatch between release rates and crop requirements for optimal development. Slow-release fertilizers could address both problems. Here, the synthesis and properties of a zinc fertilizer composed of cellulose microbeads loaded with aqueous ZnSO4 are reported for the first time. UV-vis spectrophotometry showed that the beads immersed in water released all Zn2+ in about 30 min, regardless of the initial Zn2+ concentration. In two sandy substrates (a pure sand and a sandy loam substrate), microprobe X-ray fluorescence spectroscopy determined Zn2+ release from beads to the substrate corresponding to count rates of about 0.115 mm min(-1) s(-1), irrespective of the substrate and with a low sensitivity for the water content, except in a very dry range. These results indicate that these microbeads could represent a practical and sustainable solution for efficient nutrient supply in agriculture. (AU)

• Processo FAPESP: 18/13401-7 - Espectroscopia de raio-X revelando os efeitos do glifosato sobre a absorção foliar de manganês em soja
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• Modalidade de apoio: Bolsas no Brasil - Mestrado
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• Processo FAPESP: 15/05942-0 - Investigação do metabolismo de nanomateriais absorvidos por plantas empregando-se espectroscopias vibracional e de Raios X
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