Desenvolvimento inicial de seis procedências de Acacia mangium Willd. no município de Barra do Garças - MT.

• Autor(a) principal: Souza, Italo Pablo Moraes de
• Data de Publicação: 2022
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Biblioteca Digital de Monografias da UFMT
• Texto Completo: http://bdm.ufmt.br/handle/1/3987
• topic: CNPQ::CIENCIAS AGRARIAS::AGRONOMIA; silvicultura; cerrado; melhoramento vegetal; avaliação de procedências; silviculture; savannah; plant improvement; evaluation of provenances

Acacia mangium is a tree species from Australia, Papua New Guinea and Indonesia that is easily adaptable to different edaphoclimatic conditions, emphasizing its low water requirement and soil fertility. Its economic utility is in the wood and cellulose industry due to the rapid development and good quality of the wood, and can also be used in Integration Crop, Livestock, Forest (ILPF), Agroforestry (SAF's), and in the recovery of degraded soils due to its potential of nitrogen fixation, besides the use in the beekeeping production. For the successful introduction of an exotic species in Brazil, evaluations of different accessions or origins must be carried out in order to obtain genetic material adapted to the region where one wishes to carry out its commercial cultivation. With this purpose, the objective was to evaluate the initial performance of commercial genotypes of A. mangium in the Cerrado biome. The experiment took place in the municipality of Barra do Garças - MT, through the evaluation of five commercial provenances of A. mangium and one local provenance. The variables that were analyzed were: plant height (ALT), stem diameter (DC), number of leaves (NF) and survival rate (TS) in the period of 90 and 180 days after planting. The design employed was randomized blocks on the Scott-Knott (1974) mean grouping test at 5% probability. At 180 days after planting, the minimum and maximum values found were: 69.5 and 166.4cm for Height; 7.2 and 15.6mm for the collar diameter; 33.5 and 93.9 for number of leaves and; 83% and 96% for survival rate. According to the results of the average tests, it was verified that the origins 2 (SantosSP), 3 (Barra do Garças-MT) and 4 (Recife-PE) presented the best results after the period of 180 days, demonstrating so that, at this stage, they have greater adaptive potential to the region. The provenances with intermediate performance were 1 (Santo André-SP) and 5 (Araçatuba-SP); and the worst was origin 6 (Itabuna-BA).