{"id":103362,"date":"2018-03-11T10:25:56","date_gmt":"2018-03-11T10:25:56","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/bases-para-la-gestion-de-masas-naturales-de-pinus-halepensis-mill-en-el-valle-del-ebro\/"},"modified":"2018-03-11T10:25:56","modified_gmt":"2018-03-11T10:25:56","slug":"bases-para-la-gestion-de-masas-naturales-de-pinus-halepensis-mill-en-el-valle-del-ebro","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/silvicultura\/bases-para-la-gestion-de-masas-naturales-de-pinus-halepensis-mill-en-el-valle-del-ebro\/","title":{"rendered":"Bases para la gestion de masas naturales de pinus halepensis mill. en el valle del ebro"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Ana M\u00aa Cabanillas Salda\u00f1a <\/strong><\/h2>\n<p>Con este estudio se pretende profundizar en el conocimiento de las masas naturales de pinus halepensis mill. Presentes en la zona del valle medio del ebro estableciendo algunas herramientas imprescindibles para su adecuada gesti\u00f3n selv\u00edcola. \u00e9stas servir\u00e1n de base para la futura ordenaci\u00f3n de las mismas, de tal forma que se pueda alcanzar el objetivo principal y concreto que debe marcar su gesti\u00f3n, que es la b\u00fasqueda de su persistencia mediante la regeneraci\u00f3n natural, sin intervenci\u00f3n del incendio forestal, y empleando las herramientas que la selvicultura nos ofrece. Adem\u00e1s ayudar\u00e1n a alcanzar el segundo objetivo concreto que se plantea, que es el mantenimiento y ampliaci\u00f3n del m\u00e1ximo de utilidades y la consecuci\u00f3n de un rendimiento sostenido que permita el establecimiento y la ejecuci\u00f3n de la selvicultura necesaria sin necesidad de inversi\u00f3n p\u00fablica externa al monte. \t la zona de estudio corresponde a dos amplias zonas cubiertas por masas naturales de pinus halepensis, denominadas respectivamente \u00abgrupo de montes de zuera y castej\u00f3n de valdejasa\u00bb y \u00absierra de alcubierre\u00bb. Ambas zonas est\u00e1n incluidas dentro del valle medio del ebro y pertenecen simult\u00e1neamente a las provincias de huesca y zaragoza, ocupando una superficie total aproximada de 40.000 hect\u00e1reas.  en primer lugar, se ha realizado un somero repaso de las caracter\u00edsticas bot\u00e1nicas, ecol\u00f3gicas y selv\u00edcolas de la especie, tanto a un nivel general como particularizado para la zona de estudio, incidiendo en este caso en algunos aspectos que pueden ser m\u00e1s relevantes, como es la ocurrencia de incendios forestales.  los datos utilizados proceden de un inventario forestal realizado en 924 parcelas, en el a\u00f1o 2001, y del apeo, en el a\u00f1o 2004, de 111 \u00e1rboles.   como herramientas necesarias para sentar las bases de una selvicultura apropiada a estas masas se ha obtenido una relaci\u00f3n altura-di\u00e1metro generalizada, resultando el modelo de sloboda et al. (1993) mod. El m\u00e1s adecuado. Tambi\u00e9n se ha demostrado que la funci\u00f3n de weibull permite modelizar las distribuciones diam\u00e9tricas. Adem\u00e1s,  se ha seleccionado el modelo exponencial de riemer et al. (1995) como la funci\u00f3n m\u00e1s indicada para definir el perfil del tronco y construir una tarifa de cubicaci\u00f3n con clasificaci\u00f3n de productos. En estos casos los an\u00e1lisis se han realizado tanto para el conjunto total de datos de forma combinada como para el conjunto de datos de cada una de las zonas por separado (alcubierre y zuera) con objeto de poder comprobar si exist\u00edan diferencias entre las dos zonas estudiadas.   por otra parte, se ha elaborado un sistema de calidad para la masa y se ha comparado con otras curvas de calidad existentes para la especie. El modelo elegido para representar la calidad ha sido el de hossfeld iv (cit. En kiviste et al., 2002). Se han establecido tres calidades, correspondientes a 6, 10 y 14 metros de altura dominante a los 60 a\u00f1os, suficientes para clasificar la zona de estudio, dada su baja productividad.  finalmente, una vez obtenidas las anteriores ecuaciones que relacionan diferentes variables, tanto de \u00e1rbol como de parcela, y aunque todas ellas tienen aplicaci\u00f3n directa en la gesti\u00f3n forestal, se han realizado unos modelos compilatorios que permiten aglutinar todas ellas. De esta manera se facilita a los gestores su aplicaci\u00f3n pr\u00e1ctica. Se ha realizado un diagrama de manejo de la densidad y un modelo est\u00e1tico de crecimiento con desagregaci\u00f3n por clases diam\u00e9tricas. Con el diagrama de manejo de la densidad el objetivo que se pretende es crear una herramienta de sencillo uso para la gesti\u00f3n y clareo de las masas en funci\u00f3n de su espaciamiento medio, permitiendo al gestor estimaciones r\u00e1pidas, incluso en campo. Con el modelo est\u00e1tico de crecimiento con desagregaci\u00f3n por clases diam\u00e9tricas se plantea la obtenci\u00f3n de datos m\u00e1s elaborados, permitiendo incluso la estimaci\u00f3n de vol\u00famenes con clasificaci\u00f3n de productos e incluyendo las distribuciones diam\u00e9tricas. As\u00ed, se consideran ambas herramientas como complementarias, la primera m\u00e1s \u00e1gil y r\u00e1pida y la segunda m\u00e1s elaborada. Por \u00faltimo, se incluyen algunos ejemplos de aplicaci\u00f3n de ambos modelos.   abstract  the aim of this study is to deepen in the knowledge of the pinus halepensis mill. Natural stands in the ebro medium valley (northeaster spain). Some necessary tools are established for a suitable forest management. These tools will be useful for the management projects to be developed in that stands, in order to reach the main objective: guaranteeing their persistence by natural regeneration, without forest fire occurring, and using the new available forest methods. In the other hand, they will help to achieve the second and third specific objectives established. These are the maintenance &#8211; and the increasing &#8211; of the maximum of utilities and obtaining a sustained yield that allows the implementation of the required forestry without public external investment on the forest.  the study area is divided into two wide areas of natural forest of pinus halepensis, called respectively \u00abgrupo de montes de zuera and castej\u00f3n de valdejasa\u00bb and \u00absierra de alcubierre\u00bb. Both zones are included inside the ebro medium valley located in the huesca and zaragoza provinces and occupying a total of circa 40.000 hectares.  firstly, a shallow review of the botanical, ecological and silvics of the species has been carried out. More precisely, and focussing in the study area, the more relevant aspects have been considered like the forest fires occurrence.  data analyzed come from a forest inventory carried out in 924 plots, in 2001, and from 111 selected trees cut in 2004.   as an essential tool for establishing the bases of a suitable forestry in this area, a generalized relationship height-diameter has been obtained. The sloboda et al. (1993) model was the most appropriate. Furthermore, the weibull function modelled very accurately the diameter distribution. Also, the exponential model from riemer et al. (1995) has been selected as the most suitable function to define the stem taper function and the merchantable volume equation with products classification. Analyses have been carried out for the global data and separately by zones (alcubierre and zuera) in order to check the possible differences existing between the two studied areas.   on the other hand, a site index model has been developed for the study area and it has been compared with other present site index curves for the species. The selected model for characterizing the quality has been the hossfeld iv (in kiviste et al., 2002). Moreover, only three quality curves (6, 10 and 14 m at 60 years) were enough for classifying all the studied area due to the low production of these woods.  finally, after obtaining the above equations relating several individual tree and stand variables, and even though all of them have direct application in forest management, some compiling models have been carried out for combining all them and for fostering the practical implementation of them. A stand density management diagram and a static model of growth by diameter classes have been made as well. The stand density management diagram is a very easy and practical tool for the management and thinning planning based on stand density, allowing quick estimations even in field. The static model of growth by diameter classes offers more elaborated data, providing the estimation of the volume from different classified products and the diameter distribution. Both tools are considered complementary being the first one more agile and fast and the second more elaborated.  lastly, some practical examples of both models are included.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Bases para la gestion de masas naturales de pinus halepensis mill. en el valle del ebro<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Bases para la gestion de masas naturales de pinus halepensis mill. en el valle del ebro <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Ana M\u00aa Cabanillas Salda\u00f1a <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 27\/07\/2010<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Marcos Barrio Anta<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Antonio Notario g\u00f3mez <\/li>\n<li>Mar\u00eda  cristina Vega Garc\u00eda (vocal)<\/li>\n<li>gregorio Montero gonz\u00e1lez (vocal)<\/li>\n<li>Alberto Madrigal collazo (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Ana M\u00aa Cabanillas Salda\u00f1a Con este estudio se pretende profundizar en el conocimiento de las masas naturales 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