Uso de imágenes termales y fluorescencia de clorofila como indicadores de efectividad del uso de mallas en el control de golpe de sol en manzanas
Loading...
Date
2025
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Universidad de Concepción
Abstract
El daño por golpe de sol es la principal causa de pérdida de rendimiento comercial en manzanas producidas en Chile y cuya incidencia ha aumentado en los últimos años debido al calentamiento global. Por lo anterior, existe la necesidad de desarrollar nuevas estrategias de manejo preventivo para este problema. El objetivo de este trabajo fue evaluar el uso de imágenes termales y de fluorescencia de clorofila como indicadores para discriminar la efectividad del uso de malla en el control de daño por sol en manzanas. Para ello se realizó un monitoreo de temperatura con imágenes termales y fluorescencia de eficiencia fotoquímica del fotosistema II (Fv / Fm) en la superficie expuesta de manzanas para tres momentos del día (10:00, 13:00 y 16:00 horas) y en dos momentos de la temporada. Al momento de cosecha se evaluó la incidencia y severidad de daño por sol en la fruta. Dentro de los resultados, se pudo observar diferencias de hasta 5,7 °C en la temperatura de frutos con y sin malla, por otra parte, el valor de Fv / Fm fue 15 % superior en los frutos bajo malla. La variación en los niveles de Fv / Fm se relacionó significativamente con (R2 = 0,62; P = 0,020) la incidencia de daño por golpe de sol para huertos manejados con y sin malla. Los resultados de este estudio sugieren que, el uso de Fv / Fm es un método promisorio para discriminar la efectividad del uso de malla como medida de control de daño por golpe de sol en manzanas.
Sunburn damage is the main cause of commercial performance loss in apples produced in Chile and its impact has increased in recent years due to global warming. Therefore, there is a need to develop new preventive strategies to address this issue. The objective of this study was to evaluate the use of images and chlorophyl fluorescence as indicators to assess the effectiveness of using nets to control sunburn damage in apples. For it, temperature monitoring was performed using thermal images and photochemical efficiency fluorescence of photosystems II (Fv / Fm) on the exposed surface of apple at three different times of the day (10:00, 13:00, and 16:00 hours) and at two stages of the season. At harvest, the incidence and severity of sunburn damage to the fruit were evaluated. The results showed temperature differences of 5,7 °C between fruits with and without netting, and the Fv / Fm value was 15 % higher in fruit under netting. The variation of Fv / Fm levels was significantly related (R2 = 0,64; P = 0,020) to the incidence of sunburn damage in orchards managed with and without netting. The results of this study suggest that the use of the Fv / Fm parameter is a promising method for discriminating against the effectiveness of netting as a measure to control sunburn damage in apples.
Sunburn damage is the main cause of commercial performance loss in apples produced in Chile and its impact has increased in recent years due to global warming. Therefore, there is a need to develop new preventive strategies to address this issue. The objective of this study was to evaluate the use of images and chlorophyl fluorescence as indicators to assess the effectiveness of using nets to control sunburn damage in apples. For it, temperature monitoring was performed using thermal images and photochemical efficiency fluorescence of photosystems II (Fv / Fm) on the exposed surface of apple at three different times of the day (10:00, 13:00, and 16:00 hours) and at two stages of the season. At harvest, the incidence and severity of sunburn damage to the fruit were evaluated. The results showed temperature differences of 5,7 °C between fruits with and without netting, and the Fv / Fm value was 15 % higher in fruit under netting. The variation of Fv / Fm levels was significantly related (R2 = 0,64; P = 0,020) to the incidence of sunburn damage in orchards managed with and without netting. The results of this study suggest that the use of the Fv / Fm parameter is a promising method for discriminating against the effectiveness of netting as a measure to control sunburn damage in apples.
Description
Tesis presentada para optar al título de Ingeniero Agrónomo
Keywords
Imágenes térmicas, Fluorescencia, Radiación solar - Chile, Manzanas - Calidad