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Accueil du site → Doctorat → Allemagne → 2011 → Management of Natural Stands of Acacia seyal Del. variety seyal (Brenan) for Production of Gum Talha, South Kordofan, Suda

Technische Universität Dresden (2011)

Management of Natural Stands of Acacia seyal Del. variety seyal (Brenan) for Production of Gum Talha, South Kordofan, Suda

Hamed Mohammed, Mohammed

Titre : Management of Natural Stands of Acacia seyal Del. variety seyal (Brenan) for Production of Gum Talha, South Kordofan, Sudan

Auteur : Hamed Mohammed, Mohammed

Université de soutenance : Technische Universität Dresden

Grade : Doctor rerum silvaticarum (Dr. rer. silv.) 2011

Résumé
The present study was conducted in Umfakarin natural forest reserve, South Kordofan, Sudan. The main objective was to investigate the possibility of managing Acacia seyal Del. variety seyal for the production of gum talha. Three stand densities (strata), namely dense, medium, and slight, were distinguished based on the number of trees per hectare. During the sampling phase, the study adopted the method of identifying the competitors (neighboring trees) from the subject one (trees selected for gum production experiments). From the three stand densities, a total of 482 subject trees, covering variable diameter ranges (d= 9-11.5, 13.5-16, 18-20.5 and above 21 cm) were selected, based on the diameter at 0.25 m height (d0.25). In each stratum, competitor trees were identified within a radius equal to the height of subject tree multiplied by a factor (1.25). The diameter at breast height, height to crown base, height, crown radii, and tree coordinates were measured for each of the subject trees and its competitors. Subject trees were exposed to tapping on first of October, the fifteenth of October, and the first of November, using local tools (Sonki and Makmak). Additionally, untapped trees were used as controlling-variables. The initial gum collection was completed fifteen days after the tapping, while the subsequent (7-9 pickings) were done at an interval of fifteen days.

Mots clés : Acacia seyal, Gum talha, Umfakarin natural forest, South Kordofan, Sudan, Acacia seyal, Talha gummi, Umfakarin Naturwald, Süd-Kordofan, Sudan

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Page publiée le 18 décembre 2011, mise à jour le 16 janvier 2020