Evaluación de sensores vía telemetría e imágenes multiespectrales como herramientas para el manejo del riego en un huerto de clementinas en la comuna de Ovalle
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Date
2023
Journal Title
Journal ISSN
Volume Title
Publisher
Universidad de Concepción
Abstract
El objetivo del presente trabajo fue realizar una evaluación de sensores de humedad de suelo y potencial hídrico del tallo vía telemetría e imágenes multiespectrales, en un huerto de clementinas ubicado en la comuna de Ovalle, Chile. En el análisis se comparó la lámina de riego estimada por el agricultor, riego estimado a través del coeficiente de cultivo (Kc), riego registrado por el agricultor y el riego estimado a través de los sensores de potencial hídrico y humedad de suelo. También se determinó la correlación entre las lecturas de los sensores de potencial hídrico del tallo y humedad de suelo a una profundidad de 20 cm. Además, mediante imágenes satelitales obtenidas de la plataforma PLAS del Instituto de Investigaciones Agropecuarias (INIA) se logró determinar la variabilidad espacial del huerto en estudio. La metodología empleada permitió establecer que existe una buena relación entre el riego aplicado por el agricultor y la lámina de riego estimada a partir de los sensores, los cuales son un buen apoyo para el manejo del riego. También se determinó que las lecturas de la sonda de potencial hídrico son un buen indicador para la evaluación de estrés hídrico de la planta. Finalmente, se estableció que es recomendable utilizar un coeficiente de cultivo variable, según la etapa fenológica en la que éste se encuentre.
This work objetive was to carry out an evaluation of soil moisture sensors and stem water potential using telemetry and multispectral images in at a clementine orchard located in the Ovalle district, Chile. In this analysis, the irrigation depth estimated by the farmer, irrigation estimated through the crop coefficient (Kc), irrigation registered by the farmer and the estimated irrigation through the sensors of water potential and soil humidity were compared. The correlation between the readings of the stem water potential sensors and soil moisture at a depth of twenty centimeters was also determined. Besides, satellite images obtained from the PLAS platform of the Institute Agricultural Research (INIA), allowed us to determine the spatial variability of the orchard in research. Through the methodology used, it is possible to conclude that there is a good relationship between the irrigation method used by the farmer and the irrigation depth estimated by the sensors which are a good support for irrigation management. It was also determined that the readings of the water potential testing are a good indicator for the evaluation of water stress in the plant. So, the conclution is that it is advisable to use a variable crop coefficient depending on the phenological stage in which it is in.
This work objetive was to carry out an evaluation of soil moisture sensors and stem water potential using telemetry and multispectral images in at a clementine orchard located in the Ovalle district, Chile. In this analysis, the irrigation depth estimated by the farmer, irrigation estimated through the crop coefficient (Kc), irrigation registered by the farmer and the estimated irrigation through the sensors of water potential and soil humidity were compared. The correlation between the readings of the stem water potential sensors and soil moisture at a depth of twenty centimeters was also determined. Besides, satellite images obtained from the PLAS platform of the Institute Agricultural Research (INIA), allowed us to determine the spatial variability of the orchard in research. Through the methodology used, it is possible to conclude that there is a good relationship between the irrigation method used by the farmer and the irrigation depth estimated by the sensors which are a good support for irrigation management. It was also determined that the readings of the water potential testing are a good indicator for the evaluation of water stress in the plant. So, the conclution is that it is advisable to use a variable crop coefficient depending on the phenological stage in which it is in.
Description
Tesis presentada para optar al título de Ingeniero Civil Agrícola
Keywords
Riego, Potencial hídrico