25 documents found, page 1 of 3
Different N-fertilization sources affecting the native soil organic matter mine...
Oliveira,Paula Afonso de; Assis,Igor Rodrigues de; Dias,Luiz Eduardo; Silva,Ivo Ribeiro da; Barbosa,Gustavo Magalhães Nunes; Teixeira,Rafael da SilvaABSTRACT: Accidents related to the rupture of iron ore tailings dams have dramatically impacted on the Brazilian natural ecosystem. So, the development of strategies to recover soil organic matter levels and build-up Technosols are required. This study aimed to evaluate the effect of N-mineral and -organic fertilization and the rhizospheric effect on soil organic matter mineralization from Technosols built unde...
Topsoil depth influences the recovery of rupestrian grasslands degraded by mining
Rezende,Lina Andrade Lobo; Fernandes,Geraldo Wilson; Braga,Ramon de Paula; Dias,Luiz Eduardo; Gomes,Vanessa MatosABSTRACT Close association of iron mining and ferruginous rupestrian grassland places this ecosystem in a special condition of vulnerability, with a large number of degraded areas requiring restoration. Seedling transplantation and topsoil translocation can be used to recover native vegetation in degraded areas. This study aimed to experimentally test the application of two different topsoil depths (0.20 and 0....
Physical quality of bauxite tailing after a decade of environmental recovery
Guimarães,Lorena Abdalla de Oliveira Prata; Dias,Luiz Eduardo; Rocha,Genelício Crusoé; Assis,Igor Rodrigues de; Fernandes,Raphael Bragança AlvesABSTRACT Tailings from bauxite washing produced in Porto Trombetas, Pará state, a Brazilian Amazon region, have chemical and physical characteristics limiting the development of plants, which hinders to revegetate the tanks where they are deposited. This study was carried out under field conditions, and aimed to assess the physical quality of these tailings after a decade of recovery practices. Three treatments...
ESPÉCIES ARBÓREAS POTENCIAIS PARA A REVEGETAÇÃO DE REJEITO SALINO CONTAMINADO C...
Guimarães,Lorena Abdalla de Oliveira Prata; Assis,Igor Rodrigues de; Dias,Luiz Eduardo; Cordeiro,Amanda Longhi; Freire,Aline SoaresRESUMO O beneficiamento dos minérios de ouro explotados em Paracatu, MG, gera rejeitos com características químicas e físicas limitantes ao crescimento de plantas, principalmente pelo elevado teor de arsênio (As) e salinidade. Para a revegetação desse material, é necessário identificar espécies capazes de se desenvolver sob essas condições. O objetivo deste trabalho foi avaliar o potencial de quatro espécies ar...
LEAF RESIDUE DECOMPOSITION OF SELECTED ATLANTIC FOREST TREE SPECIES
Arato,Helga Dias; Dias,Luiz Eduardo; Assis,Igor Rodrigues de; Barros,Nairam Félix de; Neves,Júlio Cesar Lima; Schaefer,Carlos Ernesto Gonçalves ReynaudABSTRACT Biogeochemical cycling is essential to establish and maintain plant and animal communities. Litter is one of main compartments of this cycle, and the kinetics of leaf decomposition in forest litter depend on the chemical composition and environmental conditions. This study evaluated the effect of leaf composition and environmental conditions on leaf decomposition of native Atlantic Forest trees. The fo...
Behavior of Eucalyptus urophylla and Eucalyptus citriodora Seedlings Grown in S...
Melo,Roseli Freire; Dias,Luiz Eduardo; Assis,Igor Rodrigues deABSTRACT Persistent areas of tailings and deposits from coal and gold mining may present high levels of arsenic (As), mainly in the arsenate form, endangering the environment and human health. The establishment of vegetation cover is a key step to reclaiming these environments. Thus, this study aimed to evaluate the potential of Eucalyptus urophylla and E. citriodora seedlings for use in phytoremediation progra...
Arsenic toxicity in Acacia mangium willd. and mimosa Caesalpiniaefolia benth. s...
Cipriani,Henrique Nery; Dias,Luiz Eduardo; Costa,Maurício Dutra; Campos,Naiara Viana; Azevedo,Aristéa Alves; Gomes,Roberto JunioAcacia mangium and Mimosa caesalpiniaefolia are fast-growing woody fabaceous species that might be suitable for phytoremediation of arsenic (As)-contaminated sites. To date, few studies on their tolerance to As toxicity have been published. Therefore, this study assessed As toxicity symptoms in A. mangium and M. caesalpiniaefolia seedlings under As stress in a greenhouse. Seedlings of Acacia mangium and M. caes...
Eficiência no uso da água de duas cultivares de batata-doce em resposta a difer...
Mantovani,Everardo C; Delazari,Fábio T; Dias,Luiz Eduardo; Assis,Igor R de; Vieira,Gustavo HS; Landim,Felipe MA crescente preocupação mundial com a produção eficiente de energia e com os recursos hídricos exige desenvolver estratégias que economizem água sem redução da produtividade. Assim, objetivou-se determinar as lâminas de irrigação que resultem na máxima produtividade e uso eficiente de água para duas cultivares de batata-doce. Lâminas equivalentes a 50, 75, 100 e 125% da evapotranspiração da cultura (ETc), calcu...
Níveis críticos foliares de nutrientes de três cultivares de batata-doce, selec...
Thumé,Maurício Alberto; Dias,Luiz Eduardo; Silveira,Márcio Antônio da; Assis,Igor Rodrigues deNos últimos 12 anos, pesquisas desenvolvidas no Estado do Tocantins resultaram em dez novos cultivares de batata-doce com elevada concentração de amido, próprios para a produção de etanol. Entretanto, pouco se conhece a respeito de suas exigências nutricionais e teores foliares de nutrientes. Este trabalho teve como objetivo avaliar a absorção e a exportação de nutrientes e determinar os níveis críticos foliare...
Biomass yield and calorific value of six clonal stands of Eucalyptus urophylla ...
Andrade,Thiago Cavalcante Gomes Ribeiro de; Barros,Nairam Félix de; Dias,Luiz Eduardo; Azevedo,Maria Inês RamosThe worldwide demand for clean, sustainable energy has increased in recent years. A potential alternative energy source is biomass from nonnative forests, particularly from the genus Eucalyptus spp. in the specific case of Brazil, currently with several selected clonal stands for energy production. Because each stand adapts differently to different environments, specific studies are required in order to evaluat...