Variabilidad en el crecimiento de plántulas de ocho procedencias de Abies religiosa (H.B.K.) Schlecht. et Cham., en condiciones de vivero

Abstract

Abies religiosa presenta una amplia distribución en la República Mexicana pues se extiende desde Sinaloa y San Luis Potosí hasta Puebla y Tlaxcala e incluso se encuentran poblaciones de esta especie en Guatemala. En el Valle de México se ubica en las zonas montañosas que rodean al mismo y sus bosques tienen una gran importancia ecológica y social, pues estas masas arboladas forman parte del bosque periurbano del Área Metropolitana de la Ciudad de México. No obstante lo anterior, estos sitios arbolados están sujetos a un grave deterioro por lo que es necesario buscar alternativas para su restauración. El objetivo de este trabajo fue evaluar la variación en el crecimiento de plántulas de ocho procedencias bajo condiciones de vivero, para lo cual se utilizó un diseño experimental de ocho bloques al azar con 64 repeticiones. Los parámetros que se evaluaron fueron diámetro en la base del tallo y altura, en mediciones que se efectuaron trimestralmente durante un período de 10 meses. Las plántulas de la procedencia San Nicolás Coatepec presentaron los mayores valores en altura (37,2 cm), empero su tasa de crecimiento sólo difirió significativamente de la procedencia de Cofre de Perote. En cuanto a la tasa de crecimiento en diámetro, Coatepec (DISEFO) fue significativamente mayor al resto de las otras procedencias; sin embargo, en general no se observó ningún patrón de crecimiento relacionado con la distribución geográfica de las procedencias.

The analytic hierarchy process for selection of suitable trees for Mexico City

“…The first level of the decision-making process was the selection of small, medium and large native trees suitable for urban conditions of Mexico City. This level was determined based on the configuration of the urban landscape with a small dominating number of species, the large number of native species growing in natural conditions of the Valley of Mexico, and the recommendation of increasing native species on the urban plant selection (Mizerit 2006, Martínez 2008, Benavides et al 2011.…”

“…The analytic hierarchy process for urban tree selection information, the experience of specialists, and a multicriteria approach to qualify the suitability of potential native species. Of the final 15 species analyzed, Buddleja cordata, Populus tremuloides and Clethra mexicana are already reported as part of the diversity of species that make up Mexico City urban forest (Mizerit 2006, Martínez 2008, Benavides et al 2011; however, neither the number of specimens, genera, nor botanical families (Scrophulariaceae, Salicaceae and Clethraceae, respectively) are currently within the group of highly recommended species by literature. Therefore, their integration into the urban tree composition would be of great importance to avoid the small number of species that dominate the urban forest (Mizerit 2006, Benavides et al 2011.…”

“…Of the final 15 species analyzed, Buddleja cordata, Populus tremuloides and Clethra mexicana are already reported as part of the diversity of species that make up Mexico City urban forest (Mizerit 2006, Martínez 2008, Benavides et al 2011; however, neither the number of specimens, genera, nor botanical families (Scrophulariaceae, Salicaceae and Clethraceae, respectively) are currently within the group of highly recommended species by literature. Therefore, their integration into the urban tree composition would be of great importance to avoid the small number of species that dominate the urban forest (Mizerit 2006, Benavides et al 2011. Species that tolerate stressful conditions such as Pinus leiophylla, Alnus jorullensis, Quercus glaucoides and Viburnum elatum are not reported in Mexico City, although the genus and families to which they belong (Pinaceae, Betulaceae, Fagaceae and Adoxaceae, respectively) are also represented with a small number of specimens.…”

“…In many cities, one of the essential components of the urban structure is green areas, and different studies have been carried out to determine the most suitable tree species (Mizerit 2006, Benavides et al 2011. For example, a great diversity of species has been recorded in Mexico city (50 botanical families, 94 genera and 181 different species -Mizerit 2006, Martínez 2008, Benavides et al 2011; however, most species are represented by just a small number of individuals and predominating are those of exotic origin, particularly of the genera Ficus, Jacaranda, Casuarina and Ligustrum (Benavides et al 2011). Benavides (1992) reported that about 70% to 72% of tree species in Mexico City are exotic, and about 28-30% are native species of the Valley of Mexico.…”