Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-01-23T14:01:53Z No. of bitstreams: 5 14.pdf: 1041326 bytes, checksum: ff6fbb51630dbac380b2402be8c721f2 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-10T11:18:54Z (GMT) No. of bitstreams: 5 14.pdf: 1041326 bytes, checksum: ff6fbb51630dbac380b2402be8c721f2 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Made available in DSpace on 2015-02-10T11:18:54Z (GMT). No. of bitstreams: 5 14.pdf: 1041326 bytes, checksum: ff6fbb51630dbac380b2402be8c721f2 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) Previous issue date: 2012 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG) / O objetivo deste trabalho foi avaliar m?todos de supera??o da dorm?ncia tegumentar e substratos na germina??o de sementes de sucupira - preta (Bowdichia virgilioides Kunth.) e a influ?ncia de substratos, tamanhos de tubetes e ambientes no crescimento e qualidade de mudas da esp?cie. Os experimentos foram realizados no Centro Integrado de Propaga??o de Esp?cies Florestais ? CIPEF do Departamento de Engenharia Florestal da UFVJM, em Diamantina, Minas Gerais, constituindo os tr?s cap?tulos apresentados seq?encialmente. No cap?tulo 1, sementes de sucupira - preta foram submetidas aos tratamentos pr?-germinativos Controle (sem quebra de dorm?ncia), Imers?o em H2SO4 puro por 5 minutos, Escarifica??o mec?nica com lixa N?80, e Pr?-embebi??o em ?gua por 48h seguida de imers?o em H2SO4 puro por 5 minutos, em dois substratos (Papel e Areia). Todos os tratamentos pr?-germinativos promoveram a germina??o da sucupira - preta nos dois substratos, sendo que a Imers?o em H2SO4 puro por 5 minutos e a escarifica??o mec?nica com lixa foram os que apresentaram maiores valores para as caracter?sticas avaliadas. No cap?tulo 2, os experimentos foram instalados em dois ambientes (Pleno Sol e Casa de Sombra), sendo avaliados os efeitos de dois tamanhos de tubetes (55 cm? e 180 cm?) e quatro substratos (70% de vermiculita + 30% de casca de arroz carbonizada; 70% de vermiculita + 30% de moinha de carv?o; 70% de vermiculita + 15% de casca de arroz carbonizada + 15% de fibra de coco; e 40% de vermiculita + 30% de casca de arroz carbonizada + 30% de fibra de coco), sobre o crescimento em altura e di?metro do coleto de mudas durante 270 dias. O maior crescimento em altura e di?metro do coleto foram observados, em geral, com a utiliza??o do substrato 70% de vermiculita + 15% de casca de arroz carbonizada + 15% de fibra de coco e do tubete de 180 cm?, nos dois ambientes. No cap?tulo 3, aos 270 dias ap?s a semeadura, foram avaliados os efeitos dos tamanhos de tubetes, substratos e ambientes, semelhantes ao cap?tulo anterior, sobre as caracter?sticas morfol?gicas de qualidade de mudas (altura, di?metro do coleto, peso de mat?ria seca da parte a?rea, peso da mat?ria seca da raiz, peso da mat?ria seca total, rela??o peso de mat?ria seca da parte a?rea/di?metro do coleto, rela??o de altura da parte a?rea / peso de mat?ria seca da parte a?rea, rela??o entre o peso de mat?ria seca da parte a?rea / peso de mat?ria seca das ra?zes e o ?ndice de qualidade de Dickson). O substrato 70% de vermiculita + 15% de casca de arroz carbonizada + 15% de fibra de coco e o tubete de 180 cm? foram superiores na maioria das caracter?sticas avaliadas, independente do ambiente estudado. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Ci?ncia Florestal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2012. / ABSTTRACT The objective of this study was to evaluate methods to overcome seed coat dormancy and substrates on germination of black sucupira (Bowdichia virgilioides Kunth.) and the influence of substrates, tube sizes and environments on growth and quality of seedlings of the species. The experiments were performed at the Center for Integrated Forest Species Propagation - CIPEF at Department of Forest Engineering UFVJM in Diamantina, Minas Gerais, Brazil, constituting the three chapters that were presented sequentially. In chapter 1, black sucupira seeds were treated by pre-germination control (no dormancy), Immersion in pure H2SO4 for 5 minutes, mechanical scarification with sandpaper number. 80, and pre-soaking in water for 48h and after, immersion in pure H2SO4 for 5 minutes, two substrates (Paper and Sand). All pre-germinative treatments promoted germination of black sucupira on both substrates, and the immersion in pure H2SO4 for 5 minutes and mechanical scarification with sandpaper presented the highest values for the parameters evaluated. In Chapter 2, the experiments were conducted in two environments (full sunlight and 50% of shade), evaluated the effects of two sizes of tubes (55 cm? and 180 cm?) and four substrates (70% vermiculite + 30% rice hulls, 70% vermiculite + 30% chaff coal, 70% vermiculite + 15% carbonized rice hulls + 15% coconut fiber, and 40% vermiculite + 30% carbonized rice hulls + 30% coconut fiber), on growth in height and stem diameter of seedlings during 270 days. The greatest growth in height and stem diameter were observed, in general, using the substrate 70% vermiculite + 15% carbonized rice hulls + 15% coconut fiber and plastic tube of 180 cm ? in both environments. In chapter 3, at 270 days after sowing, we evaluated the effects of tube sizes, substrates and environments, were similar to the last chapter on the morphological parameters of quality of seedlings (height, stem diameter, dry weight of shoot , dry weight of root, total dry weight, ratio of dry weight of shoot / stem diameter, ratio of shoot height / dry weight of shoots, ratio of dry weight of shoot / dry weight of roots and the Dickson quality index), the substrate 70% vermiculite + 15% carbonized rice hulls + 15% fiber coconut and tubes of 180 cm ? were higher than in most characteristics, regardless of the environment studied.