Space-time dynamics, damage and losses quantification and canker influence (chrysoporthe cubensis) in biomass acumulation, carbon fixation in six eucalyptus' genotypes

Author(s)

Karina Goulart Tumura

• Document type: Doctoral Thesis
• Press: Botucatu. 2016-12-09.
• Institution: Universidade Estadual Paulista (Unesp). Faculdade de Ciências Agronômicas. Botucatu
• Defense date: 2015-01-30
• Advisor: Edson Luiz Furtado

Abstract

Eucalyptus' culture is one of the most important in Brazil being a source of renewable energy and wood. In addition, it supports important agro-industrial processes for the production of pulp, paper and essences. Eucalyptus, like any other plant species, can be infected by many pathogens, especially fungi, from nurseries to adult plantations. In this work, the causal agent of basal canker, Chrysoporthe cubensis, were studied. This disease has a wide geographical distribution, occurring from the southern end of São Paulo State to the Amazon, observing sensitive damages in low-lying regions of Espírito Santo State, Rio Doce Valley in Minas Gerais State and Reconcavo Baiano. Its symptons are quite varied and the fungi can attack plants from five months of age until the end of forest rotation. Young plants with small diameters may be girdled at their base by canker, being put to death. Attack in older plants may result in low or heavy typical cankers, that can be found at different heights of the trunk. The work was conducted in the area of EUCFLUX project, which were established with 16 clones in 10 experimental plots with different soil conditions and elevation. Studies of disease influence in carbon fixation and biomass accumulation are scarce, therefore, the objectives of this work were: a) verify the susceptibility to basal canker of the six clones with higher productivity used in experimental plots of EUCFLUX; b) conduct the spatiotemporal study of the disease and; c) verify the influence of basal canker in the accumulation of biomass and carbon fixation of the attacked plants. Incidence of the disease were evaluated in three plots and these data were the basis for spatiotemporal analysis. To determine biomass parameters, inventory was done in the same three plots and volume and biomass equations were adjusted. In addition, specific gravity of the wood and bark were calculated to healthy ... (AU)

• FAPESP's process: 11/18529-2 - Epidemiological analysis and influence of basal canker caused by Chrysoporthe cubensis in accumulation of biomass, carbon sequestration and energy flow in Eucalptus sp. forests
• Grantee: Karina Goulart Tumura
• Support Opportunities: Scholarships in Brazil - Doctorate