The Eucalyptus spp. is presented with a potential quality of the most interesting due to the great diversity of species linked to a good productive capacity and adaptation to the most diverse types of climate and soil. The clones, species and hybrids of this genus are consolidated by the forest-based industry as the main source of input in pulp and paper production processes. In this sense, the present work aimed to evaluate the main genetic material under development in the cerrado biome to characterize the parameters of growth,
The present study was aimed at evaluating the chemical properties and the kraft pulp produced for Cecropia palmata wood and comparing them with Eucalyptus grandis wood. Discs along the stem of 6-year-old trees were transformed into chips. Half of the chips were used for characterisation of wood chemical properties and the rest was cooked to produce kraft pulp. The properties of the pulp were determined and results showed that:(1) there was a decrease of 3.8% in the yield of C. palmata pulp compared with E. grandis; (2) specific volume of C. palmata wood pulp increased with increasing refining time but the time to reach the same Schopper-Riegler degree was shorter than E. grandis pulp; and (3) C. palmata had higher air resistance and tear index than E. grandis, while the opposite was observed for tensile index, burst index and stretch. Cecropia palmata wood had lower lignin content and higher total extractives and holocellulose contents than E. grandis wood.
RESUMOO Ipê amarelo (Handroanthus chrysotrichus) de alto valor econômico e ornamental, muito empregado na arborização urbana, apresenta uma madeira com características nobre de alta qualidade que vem chamando a atenção para seu uso em sistemas integrados como ILPF e SAFs, sua reprodução se dá exclusivamente por sementes, podendo produzir mudas desuniformes com baixa qualidade para seu uso nesses sistemas, onde a propagação por estaquia pode ser uma alternativa de produção mais uniforme. Nesse sentido, o presente trabalho objetivou-se avaliar a aplicação do extrato aquoso dos tubérculos de Tiririca (Cyperus rotundus) como fito hormônio na formação de raízes em estacas de Ipê Amarelo, avaliando as taxas de enraizamento, quantidade e comprimento de raízes. As estacas foram imersas por 10 minutos em 4 doses do extrato de Cyperus rotundus (5, 10, 25 e 50%) e em água como forma de controle. A aplicação do extrato promoveu acréscimos no desempenho radicular e nas taxas de enraizamento, conforme foi aumentando a dose, maior foi as médias obtidas, onde a dose de 50% promoveu melhores desempenhos.
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