Insights on Molecular Characteristics of Hydrochars by C-13-NMR and Off-Line TMAH-GC/MS and Assessment of Their Potential Use as Plant Growth Promoters

Autor(es)

Fregolente, Lais G. ^{[1, 2, 3]} ; dos Santos, Joao Vitor ^[1] ; Vinci, Giovanni ^[2] ; Piccolo, Alessandro ^[2] ; Moreira, Altair B. ^[1] ; Ferreira, Odair P. ^[3] ; Bisinoti, Marcia C. ^[1] ; Spaccini, Riccardo ^[2]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista Unesp, Lab Estudos Ciencias Ambientais, Inst Biociencias, Letras & Ciencias Exatas, Campus Sao Jose do Rio Preto, BR-15054000 Jardim Nazareth, Sao Jose Do Rio - Brazil

^[2] Univ Napoli Federico II, Interdept Res Ctr Nucl Magnet Resonance NMR Envir, Via Univ 100, I-80055 Portici - Italy

^[3] Univ Fed Ceara, Lab Mat Func Avancados LaMFA, BR-60455900 Fortaleza, Ceara - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Molecules; v. 26, n. 4 FEB 2021.
• Citações Web of Science: 1

Resumo

Hydrochar is a carbon-based material that can be used as soil amendment. Since the physical-chemical properties of hydrochar are mainly assigned to process parameters, we aimed at evaluating the organic fraction of different hydrochars through C-13-NMR and off-line TMAH-GC/MS. Four hydrochars produced with sugarcane bagasse, vinasse and sulfuric or phosphoric acids were analyzed to elucidate the main molecular features. Germination and initial growth of maize seedlings were assessed using hydrochar water-soluble fraction to evaluate their potential use as growth promoters. The hydrochars prepared with phosphoric acid showed larger amounts of bioavailable lignin-derived structures. Although no differences were shown about the percentage of maize seeds germination, the hydrochar produced with phosphoric acid promoted a better seedling growth. For this sample, the greatest relative percentage of benzene derivatives and phenolic compounds were associated to hormone-like effects, responsible for stimulating shoot and root elongation. The reactions parameters proved to be determinant for the organic composition of hydrochar, exerting a strict influence on molecular features and plant growth response. (AU)

• Processo FAPESP: 15/22954-1 - Transporte de metais e caracterização da matéria orgânica natural de rios da região de Itacoatiara, Amazônia
• Beneficiário: Márcia Cristina Bisinoti
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 18/15733-7 - Avaliação do emprego de carvão hidrotérmico para fins agrícola e de carvão magnético como material adsorvente
• Beneficiário: Márcia Cristina Bisinoti
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Regular
• Processo FAPESP: 17/26718-6 - Substâncias húmicas de carvão hidrotérmico e de solos Terras Pretas de Índio da Amazônia: Interações com macro e micronutrientes
• Beneficiário: Altair Benedito Moreira
• Modalidade de apoio: Auxílio à Pesquisa - Regular