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

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Aguilar, Jailson Vieira [UNESP]
Lapaz, Allan de Marcos [UNESP]
Sanches, Carlos Vinícius [UNESP]
Yoshida, Camila Hatsu Pereira
Camargos, Liliane Santos de [UNESP]
Furlani-Júnior, Enes [UNESP]

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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.



amino acids, ammonia, Gossypium hirsutum L, hormonal herbicide, Synthetic auxin

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Journal of Environmental Science and Health - Part B Pesticides, Food Contaminants, and Agricultural Wastes.