Response of five eco-physiological parameters, to the application of potassium in sunflower (Asteraceae), under semi-arid climate

• Autor: Díaz-López, Ernesto
• Formato: artículo
• Fecha de Publicación: 2020
• Institución: Universidad Nacional Agraria La Molina
• Repositorio: Revistas - Universidad Nacional Agraria La Molina
• Lenguaje: inglés
• OAI Identifier: oai:revistas.lamolina.edu.pe:article/1650
• Enlace del recurso: https://revistas.lamolina.edu.pe/index.php/jpagronomy/article/view/1650
• Nivel de acceso: acceso abierto
• Materia: Agronomic yield; light attenuation coefficient; solar radiation.

In order to know the effect of three levels of potassium on five eco-physiological parameters in sunflower, open-pollinated achenes Victory cultivar, were sown at a density of 11.08 plants m-2 with a fertilization of 100N-50P kg ha-1 N=nitrogen, P= phosphorous, K= potassium. Traits evaluated were: agronomic yield, leaf area index, light attenuation coefficient and intercepted radiation. The treatments consisted of three potassium levels: 0, 50 and 100 kg ha-1 (K2O) and four repetitions (3x4) resulting in 12 experimental units, which were evaluated under a randomized complete block design. The results indicate that the application of 50 and 100 kg ha-1 of potassium increase the agronomic yield, leaf area index, intercepted radiation as well as the light attenuation coefficient. From this investigation it can be concluded, that potassium is a very important nutrient for sunflower when it is sown in dry climates such as the Tehuacan valley, Puebla.