Estudo de biomassa de Tectona grandis L.f. sob diferentes espaçamentos no Estado de Mato Grosso

Rondon, Eliazél Vieira

doi:10.1590/s0100-67622006000300003

Cited by 13 publications

(15 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…On an individual tree basis, it helps to describe competition between trees and by being related to branch thickness (CONDÉS; STERBA, 2005); it also indirectly affects timber quality, and thus the economic value of a tree. On a stand basis, it serves to evaluate crown closure, which is on the one hand a general competition measure, and on the other an important measure of habitat quality (CONDÉS; STERBA, 2005) Like in the present work, reductions in stem diameter (Table 4) and crown diameter (Table 5) were also observed in other studies (HUMMEL, 2000;MAKINEN;HEIN, 2006;RONDON, 2006). Forest trees usually exhibit a significant relationship between their crown diameters and stem diameters (HEMERY et al, 2005).…”

Section: Discussionsupporting

confidence: 76%

“…In other studies, however (HUMMEL, 2000;MAKINEN;HEIN, 2006;RONDON, 2006) no effect of planting density was observed on tree height. Such discrepancies are due to differences in the species evaluated and in environmental conditions, including the planting densities tested.…”

Section: Discussionmentioning

confidence: 78%

“…This occurs because planting density affects several aspects of forest formation, including forest management practices, timber yield (LELES et al, 2001;RONDON, 2002;RONDON, 2006), timber quality (MIRANDA; NAHUZ, 1999;JIANG et al, 2007) and extraction, and consequently its production costs (SIMÕES et al, 1976). Planting density is one of the most important silvicultural factors employed to control tree growth and timber quality (JIANG et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…The planting density effects on tree characteristics are contradictory. Some authors have observed that greater row spacing has provided higher quadratic diameter, volume per tree, and survival estimates, and lower basal area per ha, volume per ha, leaf biomass, branch biomass, stem biomass, and total biomass estimates per ha (LEITE et al, 2006;RONDON, 2006). Other authors observed, however, that greater plant height, leaf biomass, branch biomass, stem biomass, total biomass, and stem diameter at breast height values were frequently obtained with higher row spacings (RONDON, 2002).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Planting density and initial growth of two tree species adapted to the semi-arid region

et al. 2012

View full text Add to dashboard Cite

-Planting densities influence several aspects of forest formation, including management practices, timber yield, quality, and extraction, and consequently its production costs. The objective of this study was to evaluate Mimosa caesalpiinifolia and Gliricidia sepium growth as a function of planting density (400, 600, 800, 1000, and 1200 plants ha -1 ) and plant age. The species were evaluated every 90 days for plant height (PH), crown diameter (CD) and root collar diameter (RCD) (10 cm above the ground), with the first evaluation performed at 90 days and the last at 720 days. When plants were one year of age and beyond, evaluations were conducted also for stem diameter at breast height (DBH) (1.30 m above the ground). A randomized block design with split-plots and three replicates was adopted. Species were assigned to plots, planting densities were assigned to subplots, and evaluation ages were assigned to subsubplots. The four traits in both species had their values decreased as planting density increased, but continually increased as plant age increased. For PH and RCD there was an alternation between species superiority, with gliricidia being superior to sabiá at some ages, while the opposite occurred at other ages. As to CD the species only differed in the last measurement, gliricidia being superior. With regard to DBH, gliricidia was superior starting from the second measurement. There was an effect of the species × ages interaction for the four traits and also an effect of the densities × ages interaction for CD and DBH.Keywords: Mimosa caesalpiinifolia Benth, Gliricidia sepium (Jacq.) Steud and Caatinga. DENSIDADE DE PLANTIO E CRESCIMENTO INICIAL DE DUAS ESPÉCIES ARBÓREAS ADAPTADAS AO SEMIÁRIDO ) e da idade da planta. As espécies foram avaliadas quanto à altura da planta (AP) e quanto aos diâmetros da copa (DCP) e do colo (DCO) (a 10 cm do nível do solo), de 90 em 90 dias, sendo a primeira avaliação realizada aos 90 dias e a última aos 720 dias. A partir de 1 ano de idade das plantas, foi avaliado também o diâmetro do caule à altura do peito (DAP) (a 1,30 m do nível do solo). Utilizou-se o delineamento de blocos casualizados com parcelas subsubdivididas e três repetições. As espécies foram aplicadas às parcelas, às densidades de plantio, às subparcelas, às idades de avaliação e às subsubparcelas. O aumento da densidade de plantio reduziu as quatro características estudadas nas duas espécies, que aumentaram continuamente com o incremento da idade das plantas. Na

show abstract

Section: Discussionsupporting

confidence: 76%

Section: Discussionmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Planting density and initial growth of two tree species adapted to the semi-arid region

et al. 2012

View full text Add to dashboard Cite

show abstract

“…Apesar de diversas publicações envolvendo espaçamentos de plantio (LIMA et al, 2009;MACE-DO et al, 2005;PASSOS et al, 2006;RONDON, 2006;SILVA et al, 2016) e desbastes (CALDEIRA;OLIVEIRA 2008;LEITE et al, 2006a;NOGUEIRA et al, 2006NOGUEIRA et al, , 2001, pesquisas relacionadas à definição da idade técnica de aplicação do primeiro desbaste em povoamentos, com diversos espaça-mentos são incipientes ou escassas. Por isso, foi conduzido este estudo, com objetivo de identificar a idade técnica de desbaste em povoamentos de teca, implantados em diferentes espaçamentos, no município de Água Boa-MT, utilizando MDD e MIP.…”

unclassified

Idade técnica do primeiro desbaste de povoamentos de teca em diferentes espaçamentos

Medeiros¹,

Paiva²,

Leite³

et al. 2017

Sci. For.

View full text Add to dashboard Cite

ResumoObjetivou-se neste trabalho identificar a idade técnica de desbaste em povoamentos de Tectona grandis L.f. considerando diferentes espaçamentos. Os dados utilizados são oriundos de uma rede de parcelas experimentais, com áreas iguais a 1505 e 1548 m², instaladas em dois locais no município de Água Boa, Mato Grosso, e compreendendo 12 espaçamentos. Foram consideradas nove repetições por espaçamen-to em delineamento inteiramente casualizado. As medições de altura total e diâmetro a 1,3 m de altura foram realizadas nas idades de 26, 42, 50 e 78 meses. Para a modelagem da distribuição diamétrica, utilizou-se a função Weibull e um conjunto de equações para estimar os parâmetros da função em uma idade futura. A idade técnica de desbaste foi definida a partir da aplicação do Método dos Ingressos Percentuais, com utilização do modelo expolinear. A estagnação do crescimento ocorreu mais cedo nos espaçamentos mais adensados, apresentando menores idades técnicas de desbaste, as quais variaram entre 6 e 8 anos. O método de ingressos percentuais e modelos de distribuição diamétrica são eficientes para definição da idade técnica de desbaste em povoamentos de teca com diferentes espaçamentos. Palavras-chave:Tectona grandis, Método dos Ingressos Percentuais, modelo de distribuição de diâme-tros, espaçamento inicial. AbstractThe objective of this study was to identify the technical age for the first thinning in Tectona grandis L.f. stands considering different spacing. The data are from an experimental net of sampling plots, with areas equal to 1505 and 1548 m², installed in two sites at Água Boa municipality, Mato Grosso state, considering twelve different spacing. Nine replications were considered per spacing, in a completely randomized design. Measurements of total height of the trees and diameter at 1.3 m in height were taken at the ages of 26, 42, 50 and 78 months. To model the diameter distribution, the Weibull function and a set of equations to estimate the values of its parameters in a future age were used. The technical age of thinning was defined based on the application of the Percentage Ingrowth Method, using the expo-linear model. Stagnation of growth occurred earlier in the denser spacing, with a lower technical age of thinning, which ranged between 6 and 8 years. The percentage ingrowth method and the diameter distribution models are efficient to define the technical age of thinning in teak stands with different spacing.

show abstract

Weed ecology is affected by succession in differently aged gardens of Citrus sinensis and C. reticulata

Salehian

Mohammadzadeh

2017

Rend. Fis. Acc. Lincei

View full text Add to dashboard Cite

Estudo de biomassa de Tectona grandis L.f. sob diferentes espaçamentos no Estado de Mato Grosso

Cited by 13 publications

References 2 publications

Planting density and initial growth of two tree species adapted to the semi-arid region

Planting density and initial growth of two tree species adapted to the semi-arid region

Idade técnica do primeiro desbaste de povoamentos de teca em diferentes espaçamentos

Weed ecology is affected by succession in differently aged gardens of Citrus sinensis and C. reticulata

Contact Info

Product

Resources

About