The cocoa tree (Theobroma cacao L.) is an economically, nutritionally and socially important crop. Currently, this culture is at the center of scientific debate because it is indexed to play a significant role in the phenomenon of deforestation observed in humid tropical regions. In order to contribute to its expansion while minimizing forest losses and protecting the environment, agroforestry systems integrating herbaceous or woody flora species have emerged as a better alternative. In this perspective, this study constitutes a contribution to the valuation of shade trees in the cultivation of cocoa while maintaining intact its productivity in the territory of Lubero. The objective of the study is to study the influence of shade trees on the morphometric parameters of pods in the ecological environment of Buyinga. To achieve this objective, observations were made at nine cocoa plantations chosen according to their degree of shade. With the exception of the number of pods per stem, the results show that there is a very highly significant difference in the means of the length of the pods, the circumference of the pods and the number of beans per pod in the plantations according to the degree of shading (p-value<0.05). Indeed, the average lengths of the pods are 24.83 ± 4.11 cm in moderately shaded plantations, 22.61 ± 4.38 cm in heavily shaded plantations and 19.20 ± 2.69 cm for plantations without shade (in broad daylight). The average circumferences of the pods are respectively equal to 27.99 ± 3.41 cm for plantations with medium shade, 26.47 ± 2.5 cm for plantations without shade and 26.46 ± 3.49 for plantations with strong shady. The average number of beans per pod is 38.95 in plantations with medium shade against 38.53 beans per pod for plantations without shade and 26.5 beans for plantations with strong shade. Despite the absence of significant difference in the number of pods per stem according to the degree of shade, cocoa plantations growing under medium shade induced a high number of pods per stem compared to other plantations. The average number of pods per stem is around 25.8 ± 7.25 for plantations with medium shade, 23.89 ± 6.03 for plantations with strong shade and 21.51 ± 7.44 for plantings without shade.

Following the phenological observations of the species of the Forest Reserve of Kalikuku in the face of seasonal variations in the climate, data on 30 taxa divided into 25 botanical families were collected. Fabaceae have more species than other families (16.6%).Defoliation (from May to August) is noticeable in 50% in Parinari holisti and Trema orientalis, in 70% in Carapa grandifolia and Ocotea usambarensis and in 100% in Bridelia micranthalj, Albizia gummifera and Piptadeniastrum africanum.Whereas, for the entire massif, flowering (November-mid-February) and its peak (December-January), fruiting (January-April), sheath dissemination (March-June), then regeneration (August-December) synchronously with the foliage influenced, at the same time, by precipitation from August to December, are the events summarized in the phenogram. As for the local use of wood, the surveys revealed 8 species involved in crafts, 12 in herbal medicine and 10 in mushroom production.