APLICAÇÃO FOLIAR DE UREIA, NÍQUEL E SACAROSE EM ESTÁDIO REPRODUTIVO DA SOJA

• Autor(a) principal: Dutra Kochenborger, Ana Clara
• Data de Publicação: 2023
• Outros Autores: Orioli Júnior, Valdeci, Silva, Gabriel Augusto, Martini Sargentim, Mateus, Rodrigues Torres, José Luiz
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Nativa (Sinop)
• Texto Completo: https://periodicoscientificos.ufmt.br/ojs/index.php/nativa/article/view/13662
• topic: Glycine max L.; nutrição de plantas; adubação nitrogenada; micronutriente; urease; Glycine max L.; plant nutrition; nitrogen fertilization; micronutrient; urease

The foliar application of N and Ni nutrients in the reproductive stage of soybean can bring benefits to the soybean crop. However, when using urea as a source for this practice, the occurrence of phytotoxicity in the leaves is common. This phytotoxicity can be reduced by adding Ni and sucrose to the spray solution. Thus, the present work aimed to evaluate the application of a solution with different urea concentrations, with and without the presence of Ni and sucrose. The experimental design used was in randomized blocks, in a 4x2x2 factorial scheme, with four replications. The treatments consisted of four urea concentrations (0, 5, 10 and 15% w/v), in the presence or absence of Ni (30 g ha-1 of Ni), with and without the addition of sucrose (1 mol L- 1), applied to the leaves at the beginning of the grain filling phase. The foliar application of urea proved to be viable only with the addition of sucrose to the spray solution. The addition of sucrose in the spray solution eliminates phytotoxicity in soybean plants caused by urea. No benefits were observed from the isolated or combined application of Ni and sucrose.