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Search Results: 1 - 10 of 192101 matches for " Israel Luiz de LIMA "
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Varia??o da densidade aparente e resistência à compress?o paralela às fibras em fun??o da intensidade de desbaste, aduba??o e posi??o radial em Eucalyptus grandis hill ex-maiden
Lima, Israel Luiz de;Garcia, José Nivaldo;
Revista árvore , 2010, DOI: 10.1590/S0100-67622010000300019
Abstract: the eucalyptu grandis stands apart for its productivity and quality wood. the ideal forest management where a greater wood ratio and better quality are obtained is one of the questions to be considered in the research of the e. grandis. the present work had as its general objective the study of the variation of the specific gravity and the resistance to the compression as a function of the thinning intensity, fertilization and diameter classes in the radial position in trees of a 21-year old population of e. grandis, managed under the system of selective thinning, with the application of fertilizaers. the factors used in this study were: three intensities of selective thinning (37, 50 and 75%), presence or absence of fertilizers, three diameter classes and five radial positions. the influences of the factors and of their combinations were evaluated regarding specific gravity and compression strength. the specific gravity and compression strength of the wood were influenced by factors such as fertilizer and diameter class in almost all radial positions, increasing significantly from the pith to bark. a good positive relationship was found to exist among the specific mass, compression strength and radial position.
EFFECT OF THINNING ON THE NATURAL MOISTURE CONTENT OF Eucalyptus grandis Hill ex Maiden WOOD
Israel Luiz de Lima,José Nivaldo Garcia
Revista Ciência da Madeira , 2012,
Abstract: Uma propriedade importante a ser estudada em rvores o teor de umidade natural, mas pouca import ¢ncia tem sido dada e praticamente n £o se tem informa § μes sobre a influ ancia do manejo florestal na variabilidade intra e entre rvores dessa propriedade. Esse trabalho teve, ent £o, como objetivo verificar a influ ancia do desbaste no teor de umidade natural da madeira de Eucalyptus grandis. Foram utilizadas nove rvores (tr as por parcela) nos ensaios, com 18 anos de idade. Discos na base, meia altura e topo, da altura comercial foram retirados de cada rvore para determina § £o da umidade natural da madeira. De acordo com os resultados, p ′de-se concluir que as diferentes intensidades de desbaste influenciaram significativamente no teor de umidade natural, existindo uma tend ancia de aumentar com a intensidade de desbaste e diminuir no sentido da base para o topo na altura da rvore. An important property in trees to be studied is its natural moisture content, however just a little importance has been given and practically does not have any information about the influence of forest management in the variability within and among trees of this property. Thus this study aims to verify the influence of the thinning in the natural moisture content of the Eucalyptus grandis wood. Nine trees (three per unit), 18-year old grown, coming from experimental units, were used with. Disks at base, half-height and top of trunk commercial height were taken from each tree for determination of the natural moisture content. According to the results, we could be concluded that the different intensities of thinning influenced significantly in the natural moisture content, with a tendency of this property to increase with the intensity of the thinning and decrease in the direction from the base to the top in the height of the tree.
Influência do desbaste e da fertiliza o nos índices de rachamento após desdobro e secagem em madeira serrada de Eucalyptus grandis Hill ex-Maiden. Influence of thinning and fertilization on the end split rates after sawing and after drying on Eucalyptus grandis Hill ex-Maiden sawn wood.
Israel Luiz de LIMA,José Nivaldo GARCIA
Revista do Instituto Florestal , 2008,
Abstract: O presente trabalho teve como objetivoestudar a influência do manejo florestal norendimento e na qualidade tecnológica da madeiraserrada de uma popula o plantada de Eucalyptusgrandis, de 21 anos de idade, manejada pelosistema de desbastes seletivos, com aplica o defertilizantes na época do início dos desbastes.Os fatores utilizados foram três intensidades dedesbastes seletivos (37, 50 e 75%), presen a ouausência de fertilizantes, duas classes de diametro,duas posi es verticais ao longo da altura do fustecomercial e três posi es radiais. As influênciasdos fatores e de suas combina es nas tens es decrescimento das árvores foram avaliadas de formaindireta por meio da análise das rachaduras deextremidade observadas em tábuas verdes e secas.De acordo com os resultados obtidos, p de-seconcluir que as rachaduras de extremidade de tábuaseca ou verde sofreram influências dos fatores classede diametro e posi o radial. O fator fertilizanteinfluenciou somente as rachaduras de extremidadeseca. O índice de rachadura de tábuas verde ouseca diminuiu da medula para a casca. Foi obtidauma boa rela o positiva entre rachadura de tábuaseca e rachadura de tábua verde.The goal of this work was the study ofthe influence of forest thinning on the some yieldand technological quality indicators of sawn woodfrom a 21 year old grown Eucalyptus grandis standmanaged by selective thinning, with theapplication of fertilizers of the beginning of thethinning. Thinning intensities (37, 50 and 75%),the application or not of fertilizers, two diameterclasses, two vertical positions along the stemcommercial height and three radial positions wereevaluated. The influences of the factors treatmentsand their combinations on tree growth stresseswere evaluate indirectly through green and drylumber end splitting. According with the resultsobtained, it was concluded that the green anddry lumber were influenced by diameter classand longitudinal position along the tree radius.Dry lumber end splitting were influenced byfertilization. The index end splitting of green ordry lumbers decreases of pith to bark. It wasobserved strong relationship between end splittingof dry lumber and green lumber.
Influência do desbaste em propriedades físicas e mecanicas da madeira de Eucalyptus grandis Hill ex-Maiden. Influence of thinning in physical and mechanical properties of wood of Eucalyptus grandis Hill ex-Maiden.
Israel Luiz de LIMA,José Nivaldo GARCIA
Revista do Instituto Florestal , 2005,
Abstract: Este trabalho teve como objetivoverificar a influência do desbaste em propriedadesfísicas e mecanicas da madeira numa popula o deE. grandis, aos 18 anos de idade. De acordo comos resultados, pode-se concluir que as diferentesintensidades de desbaste n o influenciaram,significativamente, nas propriedades em estudo,com exce o da densidade básica, para a qualocorreu diferen a entre as intensidades 67% e 75%.De maneira geral, verificou-se tendência dediminuírem os valores dessas propriedades físicase mecanicas, com intensidade de desbaste maiores.Quando se avaliou a varia o medula-casca paradensidade básica, resistência à compress oparalela às fibras e massa específica, a posi omais próxima da casca apresentou os maioresvalores destas propriedades, enquanto paravariável retra o volumétrica n o foi observadadiferen a significativa entre a posi o maispróxima da casca e posi o da medula. Observouse,também, que ocorreram altas correla espositivas entre massa específica e densidade básicae resistência à compress o paralela às fibras.The purpose of this work was to verifythe influence of thinning on physical andmechanical properties of the wood within an18-year-old population of E. grandis. According tothe results, it was able to conclude that a differentintensity in thinning did not influence significantlythe properties under study, except for the basicdensity, where a difference between 67% and 75%intensity occurred. In general, it was found out thatthere was a tendency of they reduce the values ofthe physical and mechanical properties under ahigher intensity of thinning. When the pith to barkvariation was assessed, the parallel compression,the specific mass, and the position of the barkshowed the highest values of those propertieswhereas for the shrinkage significant differencewas not observed between the closest position ofthe pith and position of the bark. It was alsoobserved the occurrence of a high positivecorrelation between the specific mass, basicdensity, and the compression parallel to the grain.
EFFECT OF THINNING AND FERTILIZATION ON Eucalyptus grandis Hill ex-Maiden PITH DISPLACEMENT AND LOG END SPLITTlNG
Israel Luiz de Lima,José Nivaldo Garcia,José Luiz Stape
CERNE , 2007,
Abstract: The aim of this study was to analyse the influence of thinning and fertilization on some log properties which influence sawn wood yield in a 21 year-old grown Eucalyptus grandis stand. Three selective thinning intensities (37, 50 and 75%), presence or absence of fertilizers on the beginning of the thinning, two diameter classes and two logs taken from two different vertical positions were taken as the study factors. The influence of the factors and their combination on tree growth stresses were indirectly evaluate through log end splitting and pith displacement in relation to its normal central position. Thinning, fertilization, diameter class and log position on the tree height did not have significant effect on pith displacement. The logs from fertilized plots presented higher log end splitting index than others.
Análise anat mica qualitativa e quantitativa e densidade básica da madeira de Alchornea sidifolia Müll. Arg. (Euphorbiaceae). Qualitative and quantitative anatomical analysis of the wood of Alchornea sidifolia Müll. Arg. (Euphorbiaceae)
Luiz SANTINI JUNIOR,Eduardo Luiz LONGUI,Israel Luiz de LIMA,Osny Tadeu de AGUIAR
Revista do Instituto Florestal , 2010,
Abstract: Objetivou-se caracterizar a anatomia e densidade básica da madeira de Alchornea sidifolia (tapiá-gua u), e investigar a varia o radial destas características. O material de estudo procede do lote cinco do Rodoanel trecho sul no Estado de S o Paulo, onde cinco árvores foram identificadas no campo, retirando-se discos do DAP com média de 30 cm de diametro. As análises das amostras seguiram os métodos usualmente empregados em estudo de anatomia de madeiras. A espécie apresentou camadas de crescimento distintas; vasos solitários e múltiplos; placas de perfura o simples; parênquima axial apotraqueal em linhas; raios unisseriados, alternando células quadradas e eretas com inclus es cristalíferas e amido; fibras libriformes, n o septadas e gelatinosas; canais radiais; máculas medulares; densidade básica baixa (0,38 g cm-3). Ocorreu aumento no sentido medula-casca apenas para o comprimento das fibras, diametro dos vasos e diametro das pontoa es intervasculares, características que denotam madeira homogênea e de baixa resistência. Fibras com maiores lume est o associadas a menores valores de densidade básica.In this paper, we characterize the anatomy and basic density of wood in Alchornea sidifolia (tapiá-gua u), and investigate the radial variation of these characteristics. Five trees were cut in the “Rodoanel” section southern in S o Paulo state, were removed disks with 30 cm at breast height. Six samples were taken from the pith to bark, which were analyzed according to the usual methods in anatomy and properties of wood. The results revealed the presence of layer growth, solitary and multiples vessels; simple perforation plate; axial parenchyma in lines up three cells wide; rays exclusively uniseriate, all ray cells upright and/or square with inclusions crystals and starch; ground tissue fibers, non-septate and gelatinous; radial canals; pith fleck present; low basic density (0.38 g cm-3). There was an increase in the pith to bark only for the fiber length, vessel diameter and intervessel pits diameter, which features a wood homogeneous and low resistance. Fibers with higher lumen are associated with lower basic density.
Densidade básica e dimens es celulares da madeira de Balfourodendron riedelianum em fun o da procedência e posi o radial. Basic density and wood cells dimensions of Balfourodendron riedelianum depending on the provenance and radial position.
Israel Luiz de LIMA,Stella Maris MASTELIN,Eduardo Luiz LONGUI,Miguel Luiz Menezes FREITAS
Revista do Instituto Florestal , 2011,
Abstract: O objetivo deste trabalho foi estudar a varia o radial da densidade básica e das dimens es celulares da madeira de procedências de Balfourodendron riedelianum plantadas em Luiz Antonio–SP. Mudas de três procedências (Alvorada do Sul, Gália e Bauru) foram plantadas em Luiz Antonio–SP, utilizando-se seis repeti es em delineamento experimental de blocos casualizados. Após 24 anos do plantio, abateram-se dezoito árvores, seis de cada procedência. De acordo com os resultados, pode-se concluir que a densidade básica,o diametro de vasos e a altura de raio foram influenciados pela procedência. Foi observada uma rela o positiva entre comprimento das fibras, espessura da parede das fibras, comprimentos dos vasos, diametro dos vasos e frequência de vaso com a posi o radial e uma rela o negativa entre a largura e a frequência de raio com a posi o radial.This study aimed to investigate the effect of provenances on some woodproperties of Balfourodendron riedelianum. Seedlings of three provenances (Alvorada do Sul,Gália and Bauru) were planted in Luiz Antonio–SP using randomized block design with six replicates. After 24 years of planting, eighteen trees, six of each provenance, were fell. The results revealed that basic density, vessel diameter and ray height were influenced by the provenances. A positive relationship was found among fiber length, fiber wall thickness, vessel length; vessel diameter and vessel frequency with radial position and a negative relationship between width and ray frequency with the radial position.
Effect of fertilization on cell size in wood of Eucalyptus grandis Hill Ex Maiden
Israel Luiz de Lima,Eduardo Luiz Longui,Luiz Santini Junior,José Nivaldo Garcia
CERNE , 2010,
Abstract: The use of fertilization in forest stands results in yield gains, yet little attention has been directed to its potential effects on the quality of wood produced. Information is scarce about the effect of fertilization on anatomical structures of older Eucalyptus wood. This work aims to study the effect of fertilization on tissue cell size of wood from a Eucalyptus grandis stand at age 21 years, the management system of which is based on selective thinning and fertilizer application at the start of the thinning season. Factors to consider include: presence or absence of fertilizers, two log positions and five radial (pith to bark) positions. Results led to the conclusion that fertilization significantly influenced only vessel frequency. Vessel elements length was influenced by tree height. Fiber length, fiber diameter, fiber wall thickness, vessel elements length, vessel diameter and vessel frequency were influenced by the radial position of the sample in relation to the log. A positive correlation was observed between fiber length, fiber diameter, fiber wall thickness, vessel elements length, vessel diameter, ray width and radial position, while a negative correlation was observed between ray frequency and radial position.
Varia o, divergência e correla es genéticas entre caracteres silviculturais e densidade básica da madeira em progênies de Myracrodruon urundeuva (Engler) Fr. Allem. Genetic variation, divergence and correlations among silvicultural traits and wood density in progenies of Myracrodruon urundeuva (Engler) Fr. Allem.
Ellen de Ching TUNG,Miguel Luiz Menezes FREITAS,Sandra Monteiro Borges FLORSHEIM,Israel Luiz de LIMA
Revista do Instituto Florestal , 2011,
Abstract: Myracrodruon urundeuva foi muito explorada no passado devido às qualidades de sua madeira e tornou-se escassa em todas as áreas naturais de ocorrência, sendo atualmente considerada como amea ada de extin o (categoria vulnerável). Isso torna a espécie importante para estudos relacionados à estrutura genética de popula es para fins de conserva o e melhoramento genético. Assim, a partir de um teste de progênies, instalado em 1987, em Selvíria–MS, foram estimados parametros genéticos para a densidade básica da madeira em três posi es radiais (medula, intermediária e casca), a distancia genética de Mahalanobis e correla es genéticas e fenotípicas entre caracteres de crescimento (altura total, altura do fuste e diametro à altura do peito – DAP) e densidade básica da madeira. A popula o apresentou alta densidade básica da madeira (0,75 g.cm-3) e alta herdabilidade (0,64) para este carácter na posi o intermediária e na medula, indicando forte controle genético e a possibilidade de melhoramento por sele o. Os resultados também mostraram que para essa popula o de M. urundeuva deve-se utilizar as progênies 1 e 14 para obten o de híbridos mais heteróticos por apresentarem maior distancia de Mahalanobis; as progênies 14 e 20 por outro lado possuem distancias muito próxima constituindo pares de progênies semelhantes, o que é interessante para se buscar melhoramento por retrocruzamento. Tais informa es s o importantes para escolha de métodos adequados de conserva o e melhoramento genético.In the past, Myracrodruon urundeuva was intensively exploited due the quality of its wood and became scarce in all natural areas of occurrence, being actually considered in extinction (vulnerable category). This makes the species important for studies of population genetic structure for conservation and breeding purposes. Thus, from a progeny test established in 1987 in Selvíria, Mato Grosso do Sul State, genetic parameters for wood density in three radials positions (pith, intermediary and bark), the Mahalanobis distance and genetic and phenotypic correlations between growth traits (total height, stem height and diameter at breast height – DBH) and wood density were estimated. The population presented high wood density (0.75 g.cm-3) and heritability (0.64) for this trait in the medulla and intermediary positions, indicating strong genetic control and the possibility of improvement by selection. The results also showed that for the studied M. urundeuva populations, the progenies 1 and 14 must be used to explore the heterotic effects because these progenies presented the h
Efeito da procedência em algumas propriedades da madeira de Gallesia integrifolia (Spreng.) Harms. Effect of provenance in some wood properties of Gallesia integrifolia (Spreng.) Harms.
Israel Luiz de LIMA,Eduardo Luiz LONGUI,Ivelize Maciel ANDRADE,José Nivaldo GARCIA
Revista do Instituto Florestal , 2010,
Abstract: A utiliza o de teste de procedência pode fornecer informa es sobreo comportamento silvicultural de popula es de uma determinada espécie, também permite a estimativa de parametros genéticos de características de interesse econ mico, sele o de material genético para diferentes locais, explora o da variabilidade e a conserva o dabase genética para usos futuros. O objetivo deste trabalho foi estudar o efeito das procedências em propriedades da madeira de Gallesia Integrifolia(pau d’alho). Mudas de três procedências (Bauru, Ribeir o Preto e Campinas) foram plantadas em Luiz Ant nio–SP, utilizando-se seis repeti es em delineamento experimental deblocos casualizados. Após 26 anos do plantio, abateram-se dezoito árvores, seis de cada procedência. As propriedades estudadas foram: densidade aparente, densidade básica, resistência à compress o paralela às fibras e retra o volumétrica. De acordo com os resultados obtidos, p de-se concluir que a procedência das sementes influenciou significativamente na densidade aparente, mas n o interferiu nos demais parametros analisados. Provenance tests, besides supplying information on the silvicultural behavior of populations of a species, allows the estimate of genetic parameters for economic traits, genetic selection and variability utilization and the conservation of the genetic basis for future uses. This study aims to investigate the effect of provenances on some wood properties of the Gallesia integrifolia. Seedlings of three provenances (Bauru, Ribeir o Preto and Campinas) were planted in Luiz Ant nio–SP using randomized block design with six replicates. After 26 years of planting, eighteen trees were felled, six of each provenance. The properties studied were specific gravity, basic density, compression parallel strength and volumetric shrinkage. According to the results it can be concluded that the studied properties were not influenced by the effect of provenances, except the specific gravity.
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