Influência Do Sombreamento Na Produção De Mudas De Angelim Pedra (Dinizia Excelsa Ducke)

Abstract

This experiment was carnea out at Ducke reserve, Amazonas, Brazil in order to detect the influence of shading on the production of D. excelsa seedlings. The shading intensities (30%, 50% and 70%) were obtained by using black plastic screening. The evaluation of height, coll r diameter, shoot and rood dry weight of D. excelsa seedlings was performed after 30, 60 e 90 days in the nursery. The following results were obtained: a) with regard to period, seedlings with higher height were removed with 90 days; for the other paramenters abalyzed, no significant differences were found; b) seedlings with higher height were produced to 30% and 50% shading; collar diameter and seeding height decreased significantly with 70% shading, c) higher above ground dry weight biomass of seedlings were obtained when lower shading levels were used (30% and 50%).