Open Access
ARTICLE
Effect of gibberellic acid on postharvest of sunflower and its potassium fertilization in alkaline soil
Díaz-López E1, A Morales-Ruíz1, A Olivar-Hernández1, HR Bravo-Delgado2, JM Loeza-Corte3
1
Agricultura Sustentable y Protegida, Universidad Tecnológica de Tehuacán. Prolongación de la 1 sur No. 1101. San Pablo Tepetzingo. Tehuacán. C.P. 75859. Puebla, México.
2
Ingeniería en Procesos Bioalimentarios, Universidad Tecnológica de Tehuacán. Prolongación de la 1 sur No. 1101. San Pablo Tepetzingo. Tehuacán. C.P. 75859. Puebla, México.
3
Cuerpo Académico Tecnologías Agroalimentarias en Zonas Áridas. Ingeniería en Agroindustrias, Universidad de la Cañada. Carretera Teotitlán - San Antonio Nanahuatipán Km 1.7 s/n. Paraje Titlacuatitla. Teotitlán de Flores Magón. C.P. 68540. Oaxaca, México.
Address correspondence to: Juan Manuel Loeza-Corte, e-mail:
Phyton-International Journal of Experimental Botany 2018, 87(all), 18-24. https://doi.org/10.32604/phyton.2018.87.018
Abstract
Sunflower is a crop that is used as ornamental, oleaginous,
forage, and currently as a bioremediation plant, of hard water
affected soils. For this reason, the main objective of this investigation
was to study the effect of potassium fertilization on yield under field
conditions, and the effect of gibberellic acid (GA
3), at postharvest
of inflorescences. Two experiments were established, under field and
laboratory conditions. In the field experiment, four levels of potassium,
0, 50, 100 and 150 kg/ha were evaluated, under a randomized
complete block design and four replicates (4×4) = 16 experimental
units. The variables evaluated were agronomic and biological yields,
harvest index, leaf area index and intercepted radiation. The variables
in the laboratory were: diameter of the stem, basal diameter of the
stem, weight of tubular flowers, vase life and days at opening of the
capitulum. Treatments consisted of six levels of GA
3 and five replicates
(6×5) = 30 experimental units, evaluated under a completely
randomized design. The results indicated, that the maximum values
for agronomic and biological yields were obtained with the application
of 150 kg/ha of potassium. The maximum intercepted radiation
was reached at 90 days after sowing on all treatments. In the laboratory,
the longer vase life was obtained with the application of 20 and
40 mg/L of GA
3 including the control. As for the opening of capitulum,
the control opened in less time, while the concentrations of 40
and 60 mg/L of GA
3 delayed the opening of the capitulum. From
this work it is concluded, that the sunflower responds positively to
potassium fertilization under soil alkalinity conditions. The application
of GA
3, in post-harvest conditions affected the inflorescences of
the species, delaying the opening of the capitulum.
Keywords
Cite This Article
E, D., Morales-Ruíz, A., Olivar-Hernández, A., Bravo-Delgado, H., Loeza-Corte, J. (2018). Effect of gibberellic acid on postharvest of sunflower and its potassium fertilization in alkaline soil.
Phyton-International Journal of Experimental Botany, 87(all), 18–24. https://doi.org/10.32604/phyton.2018.87.018