Sinopse São apresentados dados do comportamento de 12 espécies nativas em plantios de enriquecimento, com comparações estatísticas do desenvolvimento em altura no oitavo ano.

Summary The results of an experimental plantation of 12 native forest species are analysed. The plantation was in the form of forest enrichment plantations, which were cultivated in small blocks. Tables of the development of the 12 species showing annual measurements of height are given and comparisions of the development of the species are made by means of statistical analyses.

Sinopse São comparados diferentes tratamentos silviculturais em plantios artificiais de Carapa guianensis Aubl., e apresentados dados dendrométricos dos incrementos anuais em diâmetro e altura, e as conclusões preliminares para o cultivo.

Summary In this paper results on experimental plantation are presented by the authors. This experiment were worked out in the Reserva Florestal Ducke, Manaus-Amazonas-Brasil, with Carapa guianensis Aubl. (Meliaceae), where are compared three silviculture treatments. In each area were utilized 100 plantations. In addition to the presentation of the growing data in each cultivating condition, and the comparisons among the applied treatments, preliminary conclusions for the especies plantation are established.

Sinopse Com as informações obtidas na Reserva Florestal Ducke de Parcela Experimental, os autores apresentam dados dendrométricos de essências nativas da Amazônia.

Summary 15 native Amazonian species, cultivated in cleared areas at Reserva Ducke were observed for 10 years. Dendrometric data are presented.