masterThesis
Produção e distribuição de biomassa em clones de Eucalyptus grandis x Eucalyptus urophylla no município de Macaíba-RN
Fecha
2015-12-18Registro en:
SILVA, Jucier Magson de Souza e. Produção e distribuição de biomassa em clones de Eucalyptus grandis x Eucalyptus urophylla no município de Macaíba-RN. 2015. 37f. Dissertação (Mestrado em Ciências Florestais) - Universidade Federal do Rio Grande do Norte, Universidade Federal do Rio Grande do Norte, Natal, 2015.
Autor
Silva, Jucier Magson de Souza e
Resumen
Biomass production is one of the most important variables in a forest stand and its relative distribution in the different compartments of the tree (wood, branches, leaves, bark and roots) is one of the main features to consider when choosing a species, seeking to achieve greater productivity. The partition of biomass in forest species is variable and can be influenced by both environmental factors and by factors inherent to the species, being necessary to carry out individual studies for each genetic material and soil and climatic condition. In this sense the objective of this study was to determine the aboveground biomass production in three clones of Eucalyptus grandis x Eucalyptus urophylla (AEC0224, AEC0144, GG100), as well as its relative distribution between the components of the trees to 12, 24, 36 and 48 months of age. The work was carried out in forest area of testing (AEF) campus Macaíba / UFRN, located at the Agricultural School of Jundiaí. For quantification of biomass used is the destructive method hovering four trees with DAP medium for each clone and age considered. After slaughter, every tree had its components (leaf, bark, twig and wood) isolated and weighed to determine their wet weight. After weighing the sample of the various components was conducted, and these were taken to the laboratory for subsequent determination of dry weight. From the dry mass of the sample, it estimated the dry matter for each of the tree components and the total biomass of shoot. The estimation of biomass per hectare, and the total of each of the components was obtained by multiplying the average biomass of trees felled by the number of trees per hectare in each stand. The production and biomass partition were differentiated among clones. For total biomass production values found ranged from 3.33 Mg. ha-1 to 12 months and 75.35 Mg.ha-1 at 48 months old. From 24 months all clones showed greater accumulation of biomass on their shafts (wood + bark), the component wood one with the highest representation. Both production and biomass partition were dependent on genetic material and age, with the clone GG100 one that showed higher production as well as the highest proportions of biomass converted to wood.