Etude de la germination et de la croissance en pépinière de trois espèces d’arbres hôtes de chenilles comestibles de la région de Yangambi, RD Congo

Three feeder species of caterpillars consumed in the Kisangani region were selected for a study of their germination and growth. Germination tests were carried out on the scarified seeds on the one hand and the non-scarified control seeds of these three species on the other hand. At 4 months of growth after emergence we measured the growth of the plants. The results obtained indicate that scarification reduced the waiting time, the germination time and at the same time increased the germination rate of all three species studied. It further reduced the waiting time for Uapaca guineensis (from 18 days to 7 days) followed by Entandophragma cylindricum (from 32 days to 25 days) and Petersianthus macrocarpus (from 28 days to 22 days). Overall, we observed rapid germination of seeds of U. guineensis followed by seeds of P. macrocarpus, whereas seeds of E. cylindricum showed somewhat late germination. Scarification improved the germination rate of E. cylindricum and P. macrocarpus compared to U. guineensis. The highest germination rates are obtained by scarified seeds of P. macrocarpus (78.4%) followed by U. guineensis (61.5%) and finally E. cylindricum (54.2%). The not scarified seeds gave germination rates that were too low and less than 40% or even up to 13.7% for E. cylindricum. In all the species studied, only scarification resulted in a germination rate greater than 50%. Plant growth assessed at 4 months after emergence indicates better plant growth in all species studied which gave values similar to those published by other studies on other tree species.

Jaar van publicatie:2021

Toegankelijkheid:Open