Résumé
This study evaluates the growth performance of seven teak provenances planted at the Zogbepim forest sta<on in Togo's Guinean zone. The goal is to optimize silvicultural practices, particularly thinning, to enhance plantation productivity and support the local timber industry. The studied provenances include Tonou (local), Indian, Tanzanian, Ivorian, and three Malaysian (Luasong, Perlis, and Taliwas). Planted with a 3m x 3m spacing, they were monitored in 2022 before thinning and in 2024 a{er thinning. Dendrometric parameters such as total height (Hm), dominant height (H0), diameter at breast height (Dm), basal area (G), and spacing factor (S%) were measured. Sta<s<cal analysis (ANOVA) compared growth performance, and diameter structures were modeled using the Weibull distribution. Productivity was assessed using a site Index (Ip) based on dominant height and stand age. Results show significant variability among teak provenances before thinning (2022) and a{er thinning (2024). The Indian provenance had the highest diameter growth (12.87 ± 3.85 cm in 2022 and 17.91 ± 2.51 cm in 2024), while Luasong had the tallest trees (16.85 ± 2.88 m) and the highest basal area (18.94 ± 0.13 m²/ha) in 2024. The Tanzanian provenance also adapted well, with an average height of 15.70 ± 2.28 m and a basal area of 22.27 ± 0.14 m²/ha. Although Tonou showed slower height growth, it maintained a large diameter (17.22 ± 2.92 cm in 2024). The Ivorian, Perlis, and Taliwas provenances exhibited moderate growth. Thinning played a key role in reducing competition and improving growth, particularly for the Tanzanian and Luasong provenances. This study highlights the importance of selecting the right provenances and applying appropriate silvicultural practices to maximize teak planta<on productivity in Togo. Further research is needed to explore wood quality and the influence of site conditions on growth.