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https://?id=279&pages=article| Titre : | Influence of agroforestry system based on cocoa tree on the physico-chemical properties of soils of the Luki Biosphere Reserve in the Democratic Republic of Congo |
| Auteur(s): | Alasca Ekuya Lombolu ., Jeancy Ntuka Luta, François Kabambi, Irène Kibale Mande, Bhely Angoboy Ilondea., Yves-Dady Botula, Paul Mafuka |
| Mots-clés: | Agroforestry, cacao tree, deforestation, physicochemical properties of soils, Luki Biosphere Reserve |
| Date de publication | 2024-09-28 15:30:49 |
| Resumé : | Description of the subject. In the Democratic Republic of Congo, cocoa-based agroforestry systems in natural forests in general and in the Luki Biosphere Reserve in particular have an impact on the characteristics of cultivated soils.
Objective. This study examines the impact of the cocoa-based agroforestry system on the physico-chemical properties of the Luki Biosphere Reserve soils, Democratic Republic of Congo. It seeks to characterize this agroforestry system and assess its influence in the soil compared to a natural forest. Methods. The study was conducted in the Luki Biosphere Reserve (LBR), one of the main cocoa producing areas in the DRC. The climate is tropical humid with two distrinct seasons dry and wet. The agroforestry system studied include plots established by INERA and farmers between 1961 to 2017. Soil samples were collected and analyzed to determine several soil physico-chemical properties, such as: bulk density, granulometry, pH, nitrogen, organic carbon, phosphorus and potassium. Results . Soils in cocoa-based agroforestry system have a pH wich varied between 3.2 to 4.5, while forest soils have a pH around 3.5. The INERA 2017 plot had the highest pH, at 4.5. Nitrogen content is 23.5 mg.kg-¹ in natural forest, and very low in agroforestry system. However, potassium and phosphorus reach respectively the levels of 31 and 14 mg.kg-¹ in some agroforestry plots, by the way the value recorded for both elements in the natural forest was very low. Carbon stock is higher in the natural forest, 16 g.kg-¹, but lower in agroforestry system 9.23 to 11.54 g.kg-¹. Conclusion. The natural forest has high nitrogen and carbon levels, while the INERA 1961 plot shows the highest phosphorus and potassium concentrations. Tree density and species diversity significantly impact carbon storage and soil fertility, highlighting the importance of their management in agroforestry system. |
| Editeur : | RAFEA |
| DOI : |
https://dx.doi.org/10.4314/rafea.v7i3.8 |
Document pour cet article:
| Fichier | Description | Taille | Format | |
|---|---|---|---|---|
| ARTICLE-RAFEA | OPEN ACCESS | 576 ko | Adobe PDF | Lire article |