Efecto de temperatura y pluviosidad en la formación y proporción de madera temprana y tardía de Pinus radiata D. Don, y su efecto en la densidad básica de la madera.
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Date
2025
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Universidad de Concepción
Abstract
Se desarrollaron modelos para explicar el efecto de la temperatura y la precipitación en la variabilidad de la proporción de madera tardía en los anillos de crecimiento de Pinus radiata (D.Don), y su consiguiente impacto en la densidad básica de la madera. Se muestrearon 13 plantaciones sin manejo en edad de cosecha, pertenecientes a Forestal Arauco y Constitución S.A., distribuidas desde la Región del Maule hasta la Región del Biobío. En cada plantación, se establecieron 3 parcelas de 400 m², seleccionando un árbol en cada una para la extracción de tarugos de 12 mm de diámetro a 1,3 m de altura. Se utilizaron modelos lineales mixtos para analizar la proporción de madera tardía en función de la temperatura y la precipitación. Los resultados indicaron una correlación positiva y significativa entre la proporción promedio de madera tardía y la densidad básica de la madera (p< 0,05). Además, la temperatura máxima del trimestre más frío y la edad de la plantación fueron las variables más significativas para explicar la variabilidad de la proporción de madera tardía. El mejor modelo logró un error cuadrático medio de 39,91% y explicó el 34% de la variabilidad total al considerar efectos fijos y aleatorios (p< 0,1).
Models were developed to explain the effect of temperature and precipitation on the variability of the proportion of latewood in the growth rings of Pinus radiata (D.Don), and its consequent impact on the basic density of the wood. Thirteen unmanaged plantations at harvest age, belonging to Forestal Arauco and Constitución S.A., were sampled, distributed from the Maule Region to the Biobío Region. In each plantation, 3 plots of 400 m² were established, selecting one tree in each for the extraction of 12 mm diameter cores at 1.3 m height. Mixed linear models were used to analyze the proportion of latewood as a function of temperature and precipitation. Results indicated a positive and significant correlation between the average proportion of latewood and the basic density of the wood (p< 0.05). Additionally, the maximum temperature of the coldest quarter and the age of the plantation were the most significant variables to explain the variability of the proportion of latewood. The best model achieved a mean squared error of 39.91% and explained 34% of the total variability by considering fixed and random effects.workload and lack of structured support limit their effectiveness. Further research on personalized approaches, hybrid methodologies, and institutional strategies that balance training and emotional well-being is recommended.
Models were developed to explain the effect of temperature and precipitation on the variability of the proportion of latewood in the growth rings of Pinus radiata (D.Don), and its consequent impact on the basic density of the wood. Thirteen unmanaged plantations at harvest age, belonging to Forestal Arauco and Constitución S.A., were sampled, distributed from the Maule Region to the Biobío Region. In each plantation, 3 plots of 400 m² were established, selecting one tree in each for the extraction of 12 mm diameter cores at 1.3 m height. Mixed linear models were used to analyze the proportion of latewood as a function of temperature and precipitation. Results indicated a positive and significant correlation between the average proportion of latewood and the basic density of the wood (p< 0.05). Additionally, the maximum temperature of the coldest quarter and the age of the plantation were the most significant variables to explain the variability of the proportion of latewood. The best model achieved a mean squared error of 39.91% and explained 34% of the total variability by considering fixed and random effects.workload and lack of structured support limit their effectiveness. Further research on personalized approaches, hybrid methodologies, and institutional strategies that balance training and emotional well-being is recommended.
Description
Tesis presentada para optar al grado de Magíster en Ciencias Forestales
Keywords
Madera Efecto de la temperatura, Árboles Crecimiento, Pinus radiata