INITIAL DEVELOPMENT AND QUALITY OF SAPLINGS OF Copaifera langsdorffii Desf. UNDER DIFFERENT LEVELS OF SHADING

As florestas de galeria v\ueam sendo fragmentadas, levando \ue0 perda de sua elevada diversidade, tornando-se imprescind\uedveis estudos que avaliem o comportamento ecol\uf3gico de suas esp\ue9cies arb\uf3reas. O presente estudo teve como objetivo testar a hip\uf3tese de que a produ\ue7\ue3o de mudas de Copaifera langsdorffii \ue9 influenciada pela luminosidade do ambiente, apresentando maior qualidade e desenvolvimento inicial em n\uedveis intermedi\ue1rios de luz. As plantas foram testadas em pleno sol, 30%, 50%, 70% e 90% de sombreamento, avaliando-se n\ufamero de folhas, altura e di\ue2metro aos 60, 90, 120 e 191 dias ap\uf3s a emerg\ueancia (DAE) e massa seca a\ue9rea e radicular e, \uedndice de qualidade de Dickson ao final do experimento (191 DAE). O efeito dos n\uedveis de sombreamento foi analisado por meio de an\ue1lise de regress\ue3o. As plantas apresentaram boa plasticidade de crescimento nos diferentes n\uedveis de luminosidade, mas com melhor desenvolvimento e qualidade (IQD) em 50% de sombreamento, corroborando a hip\uf3tese testada. A luminosidade ou sombreamento excessivo devem ser evitados para garantir a produ\ue7\ue3o de mudas mais vigorosas de Copaifera langsdorffii. Assim, recomenda-se a produ\ue7\ue3o de mudas desta esp\ue9cie sob 50% de sombreamento para favorecer a sua qualidade e possivelmente garantir melhor sobreviv\ueancia em campo.The gallery forests are being fragmented, leading to loss of its high diversity, becoming indispensable studies assessing the environmental performance of their tree species. The objective of this study was to test the hypothesis that the production of seedlings Copaifera langsdorffii is influenced by ambient light, higher quality and initial development at intermediate light levels. Plants were tested in full sun, 30%, 50%, 70% and 90% shading in order to evaluate the number of leaves, height and diameter at 60, 90, 120 and 191 days after emergence (DAE) and dry root and shoot biomass and Dickson quality index (DQI) at the end of the experiment (191 DAE). The effect of shading levels was analyzed by means of regression analysis. The plants showed good growth plasticity at different levels of lightness, but with better development and quality (IQD) at 50% shade, corroborating the hypothesis tested. The excessive lightness or shading should be avoided to ensure the production of more vigorous seedlings of Copaifera langsdorffii. Thus, production of seedlings of this species under 50% shade is recommended to promote their quality and possibly ensure better survival in the field