Role of Slow-Release Phosphate Nanofertilizers in Forage Nutrition and Phosphorus Lability

Autor(es)

Gestal Reis, Heitor Pontes ; Giroto, Amanda Soares ; Fernandes Guimaraes, Gelton Geraldo ; Putti, Fernando Ferrari ; Pavinato, Paulo Sergio ; Teles, Ana Paula ; Ribeiro, Caue ; Fernandes, Dirceu Maximino

• Tipo de documento: Artigo Científico
• Fonte: ACS AGRICULTURAL SCIENCE & TECHNOLOGY; v. 2, n. 3, p. 9-pg., 2022-06-20.

Resumo

Up to 80% of the applied phosphorus via fertilizers can be lost to the environment through adsorption and precipitation reactions. Although nanoparticulated fertilizers can improve phosphate efficiency, they should be kept with no agglomeration, e.g., by dispersing urea (nanocomposite), which also provides nitrogen for plants. Thus, we evaluated the phosphorus dynamics in the soil and nutrient supply to Panicum maximum cv. "BRS Zuri" (Zuri grass) through three model nanocomposite fertilizers, hydroxyapatite (HAP), Bayovar rock phosphate (BAY), or triple superphosphate (TSP), dispersed in urea-starch matrices in granular form. The experiments were done in pot experiments, analyzing the chemical composition of forage and soil after each cut. After four cuts, the treatment with the TSP nanocomposite resulted in a higher number of tillers and a higher root dry matter. However, HAP and its composites showed a similar performance to TSP in the first cut for these parameters. Plants grown with TSP have absorbed more phosphorus than those supplemented by nanocomposites (considering similar dry matter yields), which suggests that the release of nutrients from nanocomposites is better adjusted to plants' needs, promoting a better phosphorus use efficiency. (AU)

• Processo FAPESP: 16/10636-8 - Da fábrica celular à biorrefinaria integrada Biodiesel-Bioetanol: uma abordagem sistêmica aplicada a problemas complexos em micro e macroescalas
• Beneficiário: Roberto de Campos Giordano
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Temático
• Processo FAPESP: 18/10104-1 - Preparação de Nanocompósitos a partir de Ureia modificada com Glicerol para otimização do Processo de Liberação Controlada de Nutrientes
• Beneficiário: Amanda Soares Giroto
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 18/01444-3 - Fosfatos nanométricos dispersos em ureia na eficiência agronômica de fósforo em solo oxídico
• Beneficiário: Heitor Pontes Gestal Reis
• Modalidade de apoio: Bolsas no Brasil - Doutorado