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Please use this identifier to cite or link to this item: http://hdl.handle.net/10400.5/4671

Title: Stand, tree and crown variables affecting cone crop and seed yield of Aleppo pine forests in different bioclimatic regions of Tunisia
Other Titles: Variables de parcela, arbol y copa que afectan la produccion de piñas y piñones en bosques de pino carrasco de Tunez
Authors: Ayari, A.
Zubizarreta-Gerendiain, A.
Tomé, Margarida
Tomé, José
Garchi, S.
Henchi, B.
Keywords: Aleppo pine
crown dimensions
cone number
seed yields
bioclimatic zones
Tunisia
Issue Date: 2012
Publisher: INIA
Citation: "Forest Systems". ISSN 2171-9845. 21(1) (2012) 128-140
Abstract: In Tunisia, the Aleppo pine seed has a great importance, since in the last decades human consumption has risen considerable. Thus its regeneration and seed production capacities are important factors to take into account to reach the necessities of the country. To study the production of cones and seeds of Aleppo pine, Tunisia’s native Aleppo pine forests were surveyed in summer 2006, using 79 plots (40 × 25 m: 1,000 m²) spread over four bioclimatic zones. Stand and tree characteristics, crown dimensions and cone/seed variables were measured from an average tree of each plot (i.e. a total of 79 trees). Recorded data were submitted to simple and multiple regression analyses for explaining the variability in crown volume and crown surface, cone number and seed yield per average tree. Results showed a negative correlation between the stand density, crown characteristics and number of cones and seeds harvested from the average tree. For crown volume and surface, age, stand density, tree height, diameter at breast height, crown diameter and crown height were important explanatory variables under multiple regression analyses. For cone number per tree, only the age, stand density and total height were the most determinant variables. Matures cone number per tree and cone mass per tree were the most informative parameters for the total seed yields per tree. Finally, forest managers should know that crown size affects cone and seed crop of the Aleppo pine individual tree grown in Tunisia, but has no effects on seed number per cone and seed mass per cone.
Peer Reviewed: yes
URI: http://hdl.handle.net/10400.5/4671
ISSN: 2171-9845
Publisher version: www.inia.es/forestsystems
Appears in Collections:DRAT - Artigos de Revistas

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