Thesis (Ph. D.)--West Virginia University, 2010. / Title from document title page. Document formatted into pages; contains vii, 199 p. : ill. (some col.), maps (some col.). Includes abstract. Includes bibliographical references.

Thesis (M.S.)--Oregon State University, 1977. / Includes bibliographical references (p. 47-49). Also available on the World Wide Web.

Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2018-06-25T19:27:10Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) emerson_delano_lopes.pdf: 2118516 bytes, checksum: 2cca51a0b316f59488bd9d5b636f0707 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2018-07-18T12:31:55Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) emerson_delano_lopes.pdf: 2118516 bytes, checksum: 2cca51a0b316f59488bd9d5b636f0707 (MD5) / Made available in DSpace on 2018-07-18T12:31:55Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) emerson_delano_lopes.pdf: 2118516 bytes, checksum: 2cca51a0b316f59488bd9d5b636f0707 (MD5) Previous issue date: 2017 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG) / O presente trabalho objetivou avaliar o crescimento, as caracter?sticas qu?micas e f?sicas, e as estimativas de massa de dois clones de Eucalyptus spp e dois clones de Corymbia spp implantados em diferentes espa?amentos de plantio, at? os 24 meses de idade. Para tanto, foi instalado um experimento em ?rea da empresa Aperam BioEnergia S/A, no munic?pio de Itamarandiba ? MG. Na avalia??o das caracter?sticas dendrom?tricas do experimento, observou-se nos espa?amentos mais amplos, os maiores valores de DAP em rela??o aos espa?amentos mais adensados, e os valores de volume por hectare foram inversamente proporcionais ao aumento dos espa?amentos de plantio. A vari?vel altura total foi a que apresentou as menores diferen?as no estudo, n?o sendo observadas redu??es em fun??o do adensamento de plantio. Na avalia??o das caracter?sticas f?sicas e qu?micas dos diferentes materiais gen?ticos, verificou-se efeito de clone na densidade b?sica da madeira e casca, sendo a densidade b?sica dos clones de Corymbia superiores aos dos clones de Eucalyptus. J? os teores de lignina na madeira seguiu tend?ncia inversa. Quanto aos teores de carbono na madeira e casca n?o foi observado efeito significativo de clone ou de espa?amento. Quanto ?s estimativas de massa, ficou constatada rela??o direta entre a produ??o de massa seca com o adensamento dos espa?amentos. A mesma tend?ncia foi verificada para as massas de carbono, cabendo ao clone C3 (h?brido de Corymbia citriodora x C. torelliana) os melhores resultados para as estimativas de massa seca e massa de carbono por hectare. Os materiais h?bridos de Corymbia spp, especialmente o clone h?brido de Corymbia citriodora x C. torelliana, podem ser utilizados como alternativa para o uso bioenerg?tico, preferencialmente em espa?amentos mais adensados. De maneira geral, os resultados do presente estudo evidenciaram varia??es na produ??o e na qualidade da biomassa florestal entre os materiais gen?ticos e espa?amentos testados. Assim, n?o se deve utilizar apenas ?nica propriedade para classifica??o da madeira/casca, pois v?rios fatores afetam o desempenho energ?tico da biomassa florestal. / Tese (Doutorado) ? Programa de P?s-gradua??o em Biocombust?veis, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2017. / The present work aimed to evaluate the growth, chemical and physical characteristics, and mass estimates of two Eucalyptus spp and two clones of Corymbia spp implanted in different planting spacing, up to 24 months of age. For that, an experiment was installed in the area of the company Aperam BioEnergia S / A, in the municipality of Itamarandiba - MG. In the evaluation of the dendrometric characteristics of the experiment, we observed in the larger spacings, the higher values of DAP in relation to the denser spacings, and the volume values were inversely proportional to the increase of the planting spacings. The variable total height was the one that presented the smallest differences in the study, not being observed reductions due to the planting densification. In the evaluation of the physical and chemical characteristics of the different genetic materials, clone effect was verified on the basic density of the wood and bark, being the basic density of the Corymbia clones superior to those of the Eucalyptus clones. On the other hand, the lignin contents in the wood followed an inverse tendency. Regarding the carbon contents in the wood and bark, no significant effect of clone or spacing was observed. As for the mass estimates, it was verified a direct relation between the dry mass production and the densification of the spacings. The same trend was observed for the carbon masses, with clone C3 being the best results for the estimates of dry mass and carbon mass. Hybrid materials of Corymbia spp, especially the hybrid clone of Corymbia citriodora x C. torelliana, can be used as an alternative for bioenergetic use, preferably in more densified spaces. In general, the results of the present study evidenced variations in the production and the quality of the forest biomass between the genetic materials and the spacings tested. Thus, one should not only use single property for wood / bark classification, since several factors affect the energy performance of forest biomass.