This experiment was carried out in the nursery at Adolph Ducke Forest Reserve in Manaus, Amazonas
State, in order to detect the influence of shading on the growth of cedrorana (Cedrelinga catenaeformis)
seedlings. Four shading levels were tested; 30%, 50% e 70% were obtained by using black plastic screening and
under full sunlight (0% shading). The growth analysis was done just after the transportation of seedlings to the
nursery and monthly during four months by desciptive method. The results suggested that: a) the height and collar
diameter were not significantly influenced by the shading; b) the greatest values in collar diameter occurred on
seedlings with 60 and 120 days; c) higher values of foliar area rate and leaf area occurred, respectively, with the
seedling cultivated at 70%, and 50% and 70%; d) the greatest values of leaf specfic weitgh were obtained without
shading; e) more stable values of relative total growth rate on seedlings cultivated under 30% of shading indicate
better adaptation to this conditions; f) concerning to the relative foliar growth rate the levels of shading more
favorables were 30% and 50%; the greatest values of a relative shoot growth rate were observed with the seedlings
cultivated at zero and 50%; g) the effect of acclimatization on seedlings cultivated under alls levels of shading
caused a temporary decrease to the relative root growth rate between 60 and 90 days.