Comportamiento de la condición y calidad de fruta de arándanos (Vaccinium corymbosum L.), cv. Liberty y Aurora bajo simulación de parámetros de exportación
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Date
2017
Authors
Carrasco Padilla, Sebastián Andrés
Journal Title
Journal ISSN
Volume Title
Publisher
Universidad de Concepción
Abstract
Se evaluó la variación en el tiempo de propiedades físicas, químicas y microbiológicas de arándanos (Vaccinium corymbosum L.) cultivar (cv.) Liberty y cv. Aurora mantenidos bajo condiciones de refrigeración en periodos que simulan tiempos de viaje de exportación a distintos destinos (0, 30, 45 y 60 días). En cv. Liberty se probó aplicaciones de Te de compost (Vitta Feed) y en Aurora aplicaciones de Calcio (Enervit Full Calcium 35®).
Para ambos cv. se evaluó además gasificación con Anhídrido sulfuroso (SO2) a tasas de Concentración-Tiempo (C-T) de 200 ppm*h-1 SO2 como una variable de estudio. Las muestras fueron tomadas en predio de Agrícola Hüne, ubicado camino a El Peral Km 0,5 Los Ángeles, Biobío, Chile, durante la temporada 2013-2014. Las evaluaciones se realizaron en el Laboratorio de Microbiología y Calidad de la Facultad de Ingeniería Agrícola y el Análisis ORAC fue realizado en el laboratorio de la Facultad de Farmacia, ambas de la Universidad de Concepción.
En general la fruta de los cv. Liberty y Aurora presentó una disminución significativa con respecto a la humedad a los 45 días poscosecha.
Los tratamientos con SO2 produce un ablandamiento de la fruta y un aumento de la deshidratación, pero se observó que el SO2 no afectan los atributos de calidad y / o el contenido polifenólico de la fruta. En los análisis de microbiología se muestra la eficiencia del tratamiento con respecto al control de Botrytis. En el control de otros hongos como Penicillium y Alternaria se observó que la C-T resultó insuficiente dada la presencia del hongo en el post-tratamiento.
The variation over time of physical, chemical and microbiological properties of blueberries was evaluated (Vaccinium corymbosum L.) cv. Liberty and Aurora maintained under cooling conditions in times that simulate travel times of export to different destinations (0, 30, 45 and 60 days). In cv. Liberty tested applications of Compost Tea (Vitta Feed) and Aurora applications of Calcium (Enervit Full Calcium 35®). For both cv. Gasification with sulfur dioxide (SO2) at Concentration-Time (C-T) rates of 200 ppm * h -1 SO2 was also evaluated as a study variable. The samples were taken at Agrícola Hüne, located on the way to El Peral Km 0,5 Los Angeles, Biobío, Chile, during the 2013-2014 season. The evaluations were carried out in the Laboratory of microbiology and quality of the Department of Agroindustries of the Faculty of Agricultural Engineering of the University of Concepción (UdeC). ORAC analysis was performed in a laboratory of the Faculty of Pharmacy of the UdeC. In general the fruit of the cv. Liberty and Aurora showed significant drops of humid between harvest and 45 days from harvest (ddc). Treatments with SO2 tend to soften the fruit and increase dehydration, however in the microbiology analyzes the goodness of the treatment in the control of Botrytis is shown. Controlling other fungi like Penicillium showed that C-T was insufficient given the presence of the post-treatment fungus. Calcium treatments in the cultivar Aurora (A + Ca) showed significantly better results than the rest of the evaluated treatments at 60 days from harvest in terms of dehydration. The greater caliber of Aurora seems to favor postharvest compared to Liberty. Liberty has greater sweetness than Aurora measured from soluble solids. The antioxidant capacity measured through the ORAC method was 30% higher in Liberty than in Aurora. The compost tea evaluated in Liberty did not show improvements in the postharvest conditions, more is shown some evidence of being a source of fungal fungi inoculum.
The variation over time of physical, chemical and microbiological properties of blueberries was evaluated (Vaccinium corymbosum L.) cv. Liberty and Aurora maintained under cooling conditions in times that simulate travel times of export to different destinations (0, 30, 45 and 60 days). In cv. Liberty tested applications of Compost Tea (Vitta Feed) and Aurora applications of Calcium (Enervit Full Calcium 35®). For both cv. Gasification with sulfur dioxide (SO2) at Concentration-Time (C-T) rates of 200 ppm * h -1 SO2 was also evaluated as a study variable. The samples were taken at Agrícola Hüne, located on the way to El Peral Km 0,5 Los Angeles, Biobío, Chile, during the 2013-2014 season. The evaluations were carried out in the Laboratory of microbiology and quality of the Department of Agroindustries of the Faculty of Agricultural Engineering of the University of Concepción (UdeC). ORAC analysis was performed in a laboratory of the Faculty of Pharmacy of the UdeC. In general the fruit of the cv. Liberty and Aurora showed significant drops of humid between harvest and 45 days from harvest (ddc). Treatments with SO2 tend to soften the fruit and increase dehydration, however in the microbiology analyzes the goodness of the treatment in the control of Botrytis is shown. Controlling other fungi like Penicillium showed that C-T was insufficient given the presence of the post-treatment fungus. Calcium treatments in the cultivar Aurora (A + Ca) showed significantly better results than the rest of the evaluated treatments at 60 days from harvest in terms of dehydration. The greater caliber of Aurora seems to favor postharvest compared to Liberty. Liberty has greater sweetness than Aurora measured from soluble solids. The antioxidant capacity measured through the ORAC method was 30% higher in Liberty than in Aurora. The compost tea evaluated in Liberty did not show improvements in the postharvest conditions, more is shown some evidence of being a source of fungal fungi inoculum.
Description
Tesis presentada para optar al título de Ingeniero Agroindustrial
Keywords
Arándanos, Anhídrido Sulfuroso, Calcio