C. R. Sanquetta

USO DE VEÍCULOS AÉREOS NÃO TRIPULADOS (VANT) PARA MENSURAÇÃO DE PROCESSOS FLORESTAIS

The use of unmanned aerial vehicles (UAV) has stood out as a tool with great potential for obtaining information in several areas of knowledge. In this sense, the goal of this research was to evaluate the performance of images collected with VANT to automate the generation of information for precision silviculture applications, such as: for the evaluation of survival, quantification of wood stock in the field and quantification of forest process residues. The development of this research was carried out in three farms, located in the Center-West of the state of São Paulo. The evaluations were: survival at 15 days after planting Eucalyptus grandis and ENCICLOPÉDIA BIOSFERA, Centro Científico Conhecer Goiânia, v.15 n.27; p. 2018 117 Eucalyptus urograndis, quantification of wood stock in the field and quantification of process residues in the field, using the UAV model X800 Geo. The results obtained with the UAV were satisfactory. Regarding survival, the UAV presented the best matching result with the recommendation, presenting 96.86% survival. As for wood stock in the field (m3), there was a change from 0.67% to 3.57% in relation to that estimated by the conventional method. The forest residues had an average volume per plot of 0.64 m3, so that the total volume was 9.09 m3 ha-1.

Renda bruta de múltiplos produtos de madeira em povoamentos de Pinus taeda submetidos a diferentes densidades de plantio e regimes de desbaste: abordagem experimental

Este artigo avalia experimentalmente o efeito de diferentes densidades de plantio e regimes de desbaste no Valor Presente Bruto da receita (VPB), advinda da producao de multiplos produtos de madeira em povoamentos de Pinus taeda. Os dados advem de um experimento implantado no municipio de Jaguariaiva, Parana, onde foram avaliados 5 espacamentos: 2,5 x 1,2 m; 2,5 x 2,0 m; 2,5 x 2,8 m; 2,5 x 3,6 m e 2,5 x 4,4 m. Cinco regimes de desbaste foram confrontados: corte final aos 15 anos, sem desbaste; corte final aos 20 anos, sem desbaste; desbaste sistematico na 6a linha aos 9 anos e corte final aos 20 anos; desbastes seletivos por baixo, com reducao de 50% do numero de arvores aos 9 e 15 anos e corte final aos 20 anos; e desbaste sistematico na 6a linha combinado com seletivo de 50% aos 9 anos, seletivo de 50% aos 15 anos e corte final aos 20 anos. O experimento fatorial foi analisado por meio de ANOVA e pelo teste de Tukey. Os resultados mostram diferencas significativas a 1% entre os espacamentos e entre os regimes de desbaste, sendo a interacao entre ambos tambem significativa. Evidenciou-se que, para a variavel VPB, a combinacao ideal e o emprego de um espacamento menor, isto e, povoamento mais denso, como 2,5 x 1,2 m, combinado com a realizacao de desbastes mais frequentes, aos 9 e aos 15 anos, preferivelmente com a adocao de desbaste sistematico na primeira intervencao. Essa combinacao foi a que determinou a maior renda bruta no presente estudo, a qual diferiu estatisticamente dos demais tratamentos. Isto revela a importância de proceder analise experimental dos regimes de manejo, permitindo, assim, decidir com melhor juizo a opcao que gera a maior renda bruta.

ANÁLISE DE TRILHA PARA AVALIAÇÃO DOS EFEITOS DA GRANULOMETRIA DO SOLO SOBRE O ÍNDICE DE SÍTIO PARA Acacia mearnsii De Wild.

The knowledge about the productive potential of a site is extreme important, mainly from the the decision maker of the handler. In this sense, an influence of the physical environment on this potential must be understood and considered in analyzes. The aim of this study was the construction of site index curves, starting from de age and height growth, and evaluating the contribution of soil texture to site index quality, considering the population of black wattle, located in the municipality of Cristal, Rio ENCICLOPÉDIA BIOSFERA, Centro Científico Conhecer Goiânia, v.14 n.25; p. 2017 58 Grande do Sul State. For that, population informations between 9 and 11 years old, located in Ouro Verde farm were used. The results obtained to dominant height classes to the site population rate studied were 18.75 m to site class III, 21.25 m to site class II and 23.75 m to site class I. As for the granulometry soil analysis, the sand content decrease allied to the depth increase was noted, while for the clay content an increase was verified, the textural class of the soils was characterized as clay loam for the superficial and subsurface layers. After the track analysis, it was observed that particle size fractions do not influence the quality of black wattle population site, with all the coefficients being lower than the residual variable rate.