INFLUÊNCIA DA DISTÂNCIA NA EXATIDÃO DA CUBAGEM NÃO DESTRUTIVA DE QUALEA SP. NO BIOMA AMAZÔNIA

Objetivou-se avaliar o efeito da distância na exatidao do dendrometro digital Criterion RD 1000®, na estimativa do diâmetro e volume de Qualea sp. no bioma Amazonia. Foram selecionadas 30 arvores e cubadas pelo metodo de Smalian ate a altura comercial com escalada e com Criterion RD 1000®, nas distâncias entre observador e a arvore de 11 m, 13 m, 15 m e a maior distância que o observador conseguiu instalar o equipamento em relacao a arvore. Para avaliar o diâmetro ao longo do fuste, o volume comercial e por segmento, realizou-se o teste t pareado, com 95% de probabilidade, a analise de residuos e as estatisticas complementares. Nao houve diferenca significativa entre os valores medios das variaveis analisadas, obtidos com a escalada e os estimados pelo Criterion. Houve menor amplitude dos residuos nas secoes inferiores do fuste com tendencia em subestimar os menores diâmetros. As estatisticas complementares demonstraram maiores erros quando o equipamento estava mais proximo da arvore e menores quando estava a 15 m, correspondendo a uma distância superior a media da altura comercial das arvores. O equipamento permitiu estimar com exatidao diâmetros e volumes de arvores em pe, viabilizando a cubagem nao destrutiva de Qualea sp. no bioma Amazonia.  Palavras-chave: mensuracao; volumetria; Criterion RD 1000®.   INFLUENCE OF DISTANCE ON THE ACCURACY OF THE NON-DESTRUCTIVE OF Qualea sp. IN THE AMAZON BIOME   ABSTRACT: The objective was to evaluate the effect of distance on the accuracy of the digital dendrometer Criterion RD 1000®, on the estimate of the diameter and volume of Qualea sp. in the Amazon biome. Thirty trees were selected and scaled by the Smalian method to commercial height with climbing and with a Criterion RD 1000®, in the distances between the observer and the 11 m, 13 m, 15 m and the longest distance that the observer managed to install the equipment in relation to the tree. To analyze diameter along the stem, commercial volume and volume per segment, the t test for dependent samples was performed, with a 95% probability, as well as residual analysis and complementary statistics. There was no significant difference between the mean values ​​of the variables analyzed, obtained with the climb and estimated with a Criterion. There was a smaller amplitude of residues in the lower sections of the stem with tendency to underestimate smaller diameters. The complementary statistics showed greater errors with the equipment closest to the tree and smaller when it was 15 m away, corresponding to a distance greater than the average commercial height of the trees. The equipment made it possible to accurately estimate the diameters and volumes of standing trees, enabling the non-destructive scaling of Qualea sp. in the Amazon biome forest. Keywords: measurement; volumetry; Criterion RD 1000®.