Journal
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES
Volume 56, Issue 9, Pages 852-859Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/03601234.2021.1966280
Keywords
Synthetic auxin; hormonal herbicide; ammonia; amino acids; Gossypium hirsutum L
Funding
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Brazil (CAPES)
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The interaction of N, Ni, and 2,4-D can improve cotton yield and content of photosynthetic pigments, especially when N is applied up to 120 kg ha(-1). The application of 2,4-D as a synthetic auxin during the beginning of flowering shows promise in enhancing cotton yield. This end-of-cycle response is linked to the cotton fruiting process's requirement for auxins.
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 (R) 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.
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