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Irrigation and fertilization as tools to boost growth stability of stone pine (Pinus pinea L.) plantationsArtículo de revistaPinus pinea es una especie mediterránea que crece y se desarrolla vigorosamente en Chile. Esta especie es resistente a la sequía; sin embargo, se ha encontrado que es sensible al aumento de la aridez. Pocos estudios han reportado efectos del riego y de la fertilización en el crecimiento, pero no hay estudios detallados que consideren los efectos de ambas técnicas de manejo para mejorar la estabilidad del crecimiento. En este trabajo, las variaciones diarias del diámetro del tronco (SDV) en Pinus pinea se monitorearon durante todo un año de crecimiento utilizando dendrómetros digitales en una plantación de 31 años en Chile. Se evaluaron cuatro prácticas de manejo como herramientas para estimular el crecimiento: fertilización, riego, su combinación y control. Las series de crecimiento diario mostraron una marcada sincronía entre árboles de diferentes esquemas de manejo. El tratamiento combinado (fertilización y riego) resultó en un período de crecimiento un 25% más largo y un mayor crecimiento que el control. Durante el período de crecimiento más rápido del tronco, los incrementos diarios de diámetro fueron, en promedio, 0.06 mm para árboles fertilizados y regados, y 0.02 mm para árboles del control. Se encontraron correlaciones significativas entre los SDV estandarizados y series de variables climáticas, evidenciando que los árboles no tratados tenían la mayor sensibilidad a temperaturas extremas, lluvia y evapotranspiración potencial. La variabilidad en el crecimiento diario del diámetro del tronco de los árboles fertilizados y regados se correlacionó solo con la temperatura mínima. Los resultados resaltan la importancia de la fertilización y del riego en plantaciones de Pinus pinea para mejorar el crecimiento del diámetro y reducir la variabilidad causada por la sensibilidad a las condiciones ambientales. Short-term stem diameter variations in irrigated and non-irrigated stone pine (Pinus pinea L.) trees in a xeric non-native environmentArtículo de revistaIrrigation of adult stone pine trees growing in a xeric non-native habitat had positive effects not only in stem diameter growth but also in tree response to climatic variability. The aim was improve our understanding of the effect of irrigation on (1) stem diameter changes of stone pine trees in a drought-prone environment in Chile and (2) the sensitivity of the species to weather conditions. Studied daily stem diameter changes in irrigated and non-irrigated 31-year-old stone pine trees during a growing season with below average precipitation in Chile. Short-term diameter changes were recorded using high-resolution dendrometers. The detrended daily stem diameter changes, expressing tree water status, were correlated with weather variability in both irrigated and non-irrigated trees. Irrigation increased stone pine productivity in this xeric environment and reduced the correlations between daily stem diameter variations and local climatic variability. Mineral fertilization and irrigation effects on fruiting and growth in stone pine (Pinus pinea L.) cropArtículo de revistaStone pine (Pinus pinea L.) is a species of economic interest for its pine nuts. Despite this market, cones are harvested mostly from natural forests. Advances in semi-intensive or intensive management for cultivating it as a fruit tree have been scarce. Fruit development is characterized by a 3-year cycle since pollination to harvesting, making nutritional and hydric management highly challenging. Materials and methods -We studied the main and interaction effects of fertilization and irrigation on growth and fruiting by a factorial design laid out in an adult stone pine plantation located in central Chile. Results and discussion -Mineral fertilization had an effect one year later on height growth (+23.5% increase) and one-year-old conelet production (+82.3% increase). After two consecutive years of mineral fertilization, significant positive impacts on diameter growth, height growth and one-year-old conelet production were observed. Irrigation enhanced fruiting but did not impact growth significantly. The highest conelet number was observed in the fertilized and irrigated experimental plots. Conclusion -Both cultural practices, applied either individually or combined, are efficient techniques to enhance fruit production of the stone pine.