Application of 2,4-D hormetic dose associated with the supply of nitrogen and nickel on cotton plants

• Autor(a) principal: Aguilar, Jailson Vieira [UNESP]
• Data de Publicação: 2021
• Outros Autores: Lapaz, Allan de Marcos [UNESP], Sanches, Carlos Vinícius [UNESP], Yoshida, Camila Hatsu Pereira, Camargos, Liliane Santos de [UNESP], Furlani-Júnior, Enes [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1080/03601234.2021.1966280; http://hdl.handle.net/11449/233416
• topic: amino acids; ammonia; Gossypium hirsutum L; hormonal herbicide; Synthetic auxin

Growth traits, yield, N content, photosynthetic pigments, ammonia and amino acids were measured to verify the effect of the interaction between N, Ni, and 2,4-D applied in the cotton crop. The objective was to study the hormonal effect of 2,4-D associated with the application of N and Ni in coverage to improve yield. The N (0, 40, 80, and 120 kg ha−1) and Ni(0, 300, 450, and 600 g ha−1) were applied to the soil in the square phenological growth stage. The commercial 2,4-D DMA® BR (0 and 1.8 g a.e ha−1) was applied to the leaves at the same growth stage. The supply of N in cover fertilization up to 120 kg ha−1 was beneficial for cotton, providing greater yield and content of photosynthetic pigments. The application of 2,4-D in a hormetic dose, as a synthetic auxin during the beginning of flowering, proved to be a promising technique to improve cotton yield. This end-of-cycle response is related to the requirement for auxins during the cotton fruiting process.