Growth, and Development of Carapa procera DC. On different types of potting soil in the nursery in Lower Casamance (SENEGAL)

Abstract

Carapa procera is a multipurpose plant whose oil is highly prized by the local population. This study aims to contribute to a better knowledge of the germination, growth and development of C. procera in nursery conditions on different types of soil. Seeds from different origin (Bignona and Oussouye) were used. Half of each batch was soaked in tap water for 24 h. A randomized block experimental design with 12 treatments and four repetitions was installed. The substrate used is the compost of Khaya senegalensis (Desr.) A. Juss. mixed with sand in different proportions. Parameters such as nut size, germination, growth and plant biomass were evaluated. The results show that the seeds from Oussouye are smaller (12.92 g on average) than those from Bignona (19.61 g on average). The germination rate is higher for seeds from Bignona (30.55%) compared to seeds from Oussouye (26.38%). Pure potting soil gave the best results for all the other parameters studied. Whatever the treatment, there is no significant difference (P=0.96) for the leaf and stem dry biomass. The same observation was made for root biomass (P=0.61). Thus, to have a good growth of the seedlings the seeds coming from Oussouye are the best advised and as substrate the pure compost of Khaya senegalensis.