Quantifica??o de danos e crescimento de eucalipto em sistema de integra??o lavoura-pecu?ria-floresta

• Main Author: Barbosa, Demerson Luiz de Almeida
• Other Authors: Leite, ?ngelo M?rcio Pinto
• Language: Portuguese
• Published: UFVJM 2018
• Subjects: Sistema agrossilvipastoril; Biomassa florestal; Fixa??o de carbono; Agrosilvopastoral system; Forest biomass; Carbon fixation
• Online Access: http://acervo.ufvjm.edu.br/jspui/handle/1/1734

Submitted by Jos? Henrique Henrique ([e-mail]) on 2018-06-25T20:55:36Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) demerson_luiz_almeida_barbosa.pdf: 1831298 bytes, checksum: 82c8ae9507b56ac9f73a9ab0bb6fec79 (MD5) === Approved for entry into archive by Rodrigo Martins Cruz ([e-mail]) on 2018-07-18T12:37:53Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) demerson_luiz_almeida_barbosa.pdf: 1831298 bytes, checksum: 82c8ae9507b56ac9f73a9ab0bb6fec79 (MD5) === Made available in DSpace on 2018-07-18T12:37:54Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) demerson_luiz_almeida_barbosa.pdf: 1831298 bytes, checksum: 82c8ae9507b56ac9f73a9ab0bb6fec79 (MD5) Previous issue date: 2017 === Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG) === Os sistemas integrados de produ??o s?o uma possibilidade para otimiza??o do cultivo sustent?vel no semi?rido mineiro, principalmente em rela??o ?s ?reas de pastagens degradadas. Objetivou-se com esse trabalho analisar quantitativamente e qualitativamente o crescimento, a produ??o e o estoque de carbono (C) de dois gen?tipos de eucalipto em sistema de integra??o lavoura-pecu?ria-floresta (iLPF) implantado no norte de Minas Gerais. Essa pesquisa foi realizada na Fazenda da Barra, munic?pio de Francisco S?, entre dezembro de 2012 e novembro de 2016. Foi conduzida em ?rea experimental de 3,2 ha subdividida em dois tratamentos com Eucalyptus cloeziana e o h?brido urograndis. O sistema foi consorciado com sorgo e capim-marandu, com espa?amentos em renques duplos (2 x 3m) x 14 metros. Em cada tratamento foram estabelecidas 12 parcelas de 336 m2 distribu?das aleatoriamente, com inclus?o de 24 ?rvores/parcela. Foram avaliadas taxas de sobreviv?ncia, di?metro na altura do solo, di?metro na altura do peito e altura total das ?rvores, al?m de danos e debilidades. Tamb?m foram analisados volume, biomassa, fixa??o de C e sequestro de di?xido de C (CO2). Os dados foram submetidos ? an?lise de vari?ncia e de matriz de correla??o. Os resultados indicaram que a abelha arapu? e o cupim foram os principais fatores bi?ticos causadores dos danos e debilidades nos eucaliptos cloeziana e urograndis, respectivamente. O crescimento e volume dos gen?tipos foram estatisticamente diferentes para os 450, 630, 1.020 e 1.320 dias ap?s o transplantio. O urograndis, embora tenha apresentado menor taxa de sobreviv?ncia (66,7%), obteve maior volume (23,4920 m3 ha-1) e resist?ncia ao per?odo de seca. No entanto, o E. cloeziana apresentou maior taxa de sobreviv?ncia (80,6%) e menor volume (9,2974 m3 ha-1). Os incrementos correntes anuais para biomassa foram maiores no urograndis (5.673,36 kg ha-1) em rela??o ao cloeziana (3.166,04 kg ha-1). Dessa maneira, o eucalipto urograndis foi o gen?tipo que apresentou maior fixa??o de C (5,53 t ha-1) e sequestro de CO2 (20,30 t ha-1) no sistema de integra??o lavoura-pecu?ria-floresta avaliado. === Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Ci?ncia Florestal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2017. === Integrated production systems are cited as a possibility for optimization of sustainable cultivation in the semi-arid region of Minas Gerais, especially in relation to degraded pasture areas. The objective of this work was to analyze quantitatively and qualitatively the growth, production and carbon stocks of two eucalyptus genotypes cultivated in an integrated crop-livestock-forest (ICLF) system in the north of Minas Gerais State, Brazil. This research was carried out at Fazenda da Barra, municipality of Francisco S?, between December 2012 and November 2016. It was conducted in a 3.2 ha experimental area subdivided into two treatments with Eucalyptus cloeziana and the urograndis hybrid. The system was intercropped with sorghum and marandu grass, with spacing in double rows (2 x 3m) x 14 m. In each treatment, 12 plots of 336 m2 were randomly distributed, including 24 trees/plot. Survival rates, diameter at soil height, diameter at breast height and total height of trees, as well as damage and weakness, were evaluated. Volumetric and biomass production, carbon (C) fixation and C dioxide sequestration (CO2) were also analyzed. Data were submitted to analysis of variance and correlation matrix. The results indicate that the ?arapu?? (Trigona spinipes) bee and the termite were the main biotic factors to the damages and weaknesses in eucalyptus cloeziana and urograndis, respectively. The growth and volumetric production of the genotypes were statistically different for the 450, 630, 1020 and 1,320 days after transplanting. Urograndis, although reaching the higher mortality rate (66.7%), had the higher volumetry production (23.4920 m3 ha-1) and resistance to the dry seasons. However, E. cloeziana had a higher survival rate (80.6%) and lower volumetric production (9.2974 m3 ha-1). The mean annual increment for biomass were higher in urograndis (5,673.36 kg ha-1) than in cloeziana (3,166.04 kg ha-1). Thus, eucalyptus urograndis was the genotype that presented higher C fixation (5.53 t ha-1) and CO2 sequestration (20.30 t ha-1) in the ICLF system evaluated.