Abstract

Consumption of fruits and vegetables provides natural antioxidants in the human diet that are capable of preventing diseases resulting from the action of free radicals. The aim of the current study was to evaluate the effect of organic nutrient solutions on the nutraceutical quality of hydroponic cantaloupe melon ( Cucumis melo L.) produced under greenhouse conditions. The applied organic solutions consisted of compost and vermicompost teas and vermicompost leachate, while Steiner nutrient solution was used as a control. Analytical tests were run to determine the antioxidant capacity and total phenolic content of the melon fruits. The nutraceutical quality (antioxidant capacity and phenolic content) of the fruits fertilized with the organic solutions was higher than that of melons fertilized using Steiner solution. Treatment with vermicompost leachate led to the highest antioxidant capacity and phenolic content among all of the treatments, resulting a 46.1% higher in antioxidant capacity (DPPH + method) and a 29.3% higher phenolic content compared with inorganically fertilized fruits. Vermicompost solutions (leachate and tea) are viable alternatives for use as a nutrient source in the production of hydroponic cantaloupe melon with improved nutraceutical quality under greenhouse conditions. El consumo de frutas y vegetales incluye antioxidantes naturales a la dieta humana, los cuales son capaces de prevenir enfermedades derivadas de la accion de radicales libres. El objetivo del presente estudio fue evaluar el efecto de soluciones nutritivas organicas sobre la calidad nutraceutica de melon Cantaloupe ( Cucumis melo L.) producido bajo condiciones de invernadero. Las soluciones organicas usadas fueron tes de compost y de vermicompost, lixiviado de vermicompost, y solucion nutritiva Steiner como control. Las pruebas analiticas realizadas fueron: capacidad antioxidante y contenido fenolico total del fruto de melon. La calidad nutraceutica (capacidad antioxidante y contenido fenolico) de los frutos fertilizados con las soluciones organicas fue mayor que en los melones fertilizados con la solucion Steiner. El tratamiento con lixiviado de vermicompost obtuvo los mayores valores de capacidad antioxidante y contenido fenolico de todos los tratamientos, resultando un 46,1% mayor en capacidad antioxidante (metodo DPPH + ), y 29,3% mayor en contenido fenolico que los frutos fertilizados inorganicamente. Las soluciones obtenidas a partir de vermicompost (lixiviado y te) son alternativas viables de fuentes nutricionales para la produccion de melon Cantaloupe hidroponico bajo condiciones de invernadero, el cual tendra una calidad nutraceutica mejorada.

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