scholarly journals Modelos para estimativas de ataque de Sirex noctilio (Fabricius) em povoamentos de Pinus taeda L.

2020 ◽  
Vol 30 (4) ◽  
pp. 1201-1216
Author(s):  
Silvio Carolo Junior ◽  
Evandro Vagner Tambarussi ◽  
Daniele Ukan ◽  
Susete Do Rocio Chiarello Penteado
Keyword(s):  
Pinus Taeda ◽  
Sirex Noctilio ◽  
Individual Volume ◽  
Pinus Taeda L ◽  
Pinus Spp ◽  
Media Volume

Uma das principais pragas dos plantios florestais de Pinus spp. é Sirex noctilio (Fabricius), conhecida popularmente como vespa-da-madeira. Este trabalho tem por objetivo desenvolver um modelo matemático para estimar o número de árvores atacadas por Sirex noctilio em povoamentos de Pinus taeda L. baseado nos métodos de monitoramento e nas características dendrométricas do reflorestamento. Selecionaram-se, para a coleta de dados, cinco áreas localizadas no município de Palmas - PR. Foram utilizadas como variáveis independentes do modelo a serem selecionadas pelo método Stepwise a amostragem sequencial, número de indivíduos da parcela, árvores-armadilha, diâmetro a altura do peito (DAP) médio, altura média, volume médio individual, volume da parcela, idade, espaçamento, sítio, área basal da parcela, área transversal média, diâmetro médio quadrático e o DAP estratificado em três classes de diâmetro. A maior influência sobre a estimativa de ataque (Y) foi exercida pelas variáveis número de árvores atacadas detectadas na amostragem sequencial (AS) (p-valor 0,001) e o número de indivíduos da parcela (n) (p-valor 0,05). O modelo mais adequado para a obtenção da variável resposta foi δ = β0 + β1AS+β2n + ε, o qual apresentou coeficiente de determinação ajustado (R²adj) de 0,965 e erro padrão de estimativa (Syx%) de 18,65% obtendo o melhor desempenho na análise gráfica dos resíduos. O modelo pode ser utilizado pelos gestores florestais como uma ferramenta na tomada de decisões quanto ao manejo do povoamento.

scholarly journals Prediction of dendrometric variables by optical data in Pinus taeda L. in the south of Brazil

2021 ◽  
Vol 8 (2) ◽  
pp. 1433-1443
Author(s):  
Carla Talita Pertille ◽  
Marcos Felipe Nicoletti ◽  
Larissa Regina Topanotti ◽  
Luís Paulo Baldiserra Schorr
Keyword(s):  
Pinus Taeda ◽  
Forest Inventory ◽  
Vegetation Indices ◽  
Basal Area ◽  
Optical Data ◽  
Landsat 8 ◽  
Landsat 8 Oli ◽  
Pinus Taeda L ◽  
South Of Brazil ◽  
Pinus Spp

The objective of this work was to estimate the basal area and volume of a Pinus taeda L. settlement located in Santa Catarina, correlating data from an orbital image of the Landsat-8 / OLI sensor and forest inventory. In this sense, a forest research was carried out, with a random sampling process using the fixed area method. 20 circular parcels of 400 m² were allocated. An orbital image of the Landsat-8 / OLI sensor was used and 10 average vegetation indices per plot were calculated. These were correlated as variables of volume and basal area per plot, decorative by the forest inventory. The index with the best correlation for the volume was GNDVI with 0.47 and for a basal area, the MVI with 0.51. The adjustment of the regression models showed adjusted R² indices of 0.5639 and Syx of 13.31% for volume, and 0.5213 and 11.93% for the basal area. It was possible to estimate the volume and basal area of the stands through the spectral data, however, it is recommended that this same technique be tested in other species of the genus Pinus spp. and with high spatial resolution media.

scholarly journals Influência das dimensões da biomassa estocada de Pinus taeda L. e Eucalyptus dunnii Maiden na qualidade do combustível para geração de energia

2014 ◽  
Vol 38 (1) ◽  
pp. 175-183 ◽  
Author(s):  
Martha Andreia Brand ◽  
Graciela Inês Bolzon de Muñiz ◽  
José Otávio Brito ◽  
Waldir Ferreira Quirino
Keyword(s):  
Pinus Taeda ◽  
Eucalyptus Dunnii ◽  
Pinus Taeda L ◽  
Pinus Spp

Este trabalho teve por objetivo determinar a influência das dimensões de biomassa sobre as alterações em suas propriedades durante a estocagem, visando seu uso na geração de energia. O experimento foi realizado no Município de Lages, SC, entre outubro de 2003 e fevereiro de 2005. Foram utilizadas toras com casca de Pinus taeda L. e Eucalyptus dunnii Maiden e costaneiras de Pinus spp., estocadas em pilhas, por um período de seis meses. As amostras para análise foram coletadas no estado recém-colhido, com dois, quatro e seis meses de estocagem. Foram utilizados quatro lotes, colhidos e armazenados segundo as estações do ano, permanecendo sob estocagem entre os meses de outubro a maio, janeiro a agosto, maio a novembro e agosto a fevereiro. As propriedades avaliadas foram: teor de umidade na base úmida, poder calorífico superior e líquido e teor de cinzas. As dimensões tiveram maior influência no teor de umidade e poder calorífico líquido. As costaneiras de Pinus sofreram maior perda de umidade, maior ganho de poder calorífico superior e inferior e menor teor de cinzas durante a estocagem. A costaneira foi também o material mais heterogêneo, com relação às variações ocorridas no armazenamento. As toras de Pinus tiveram a menor perda de umidade e o menor ganho energético. De forma geral e considerando as propriedades mais importantes para a geração de energia, as dimensões da biomassa tiveram maior influência que a espécie sobre a qualidade da biomassa na estocagem.

Reference karyotype and cytomolecular map for loblolly pine (Pinus taeda L.)

Genome ◽  
2007 ◽  
Vol 50 (2) ◽  
pp. 241-251 ◽  
Author(s):  
M. Nurul Islam-Faridi ◽  
C. Dana Nelson ◽  
Thomas L. Kubisiak
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Physical Map ◽  
5S Rdna ◽  
Relative Strength ◽  
28S Rdna ◽  
Dichotomous Key ◽  
Digestion Technique ◽  
Pinus Taeda L ◽  
Pinus Spp

A reference karyotype is presented for loblolly pine (Pinus taeda L., subgenus Pinus, section Pinus, subsection Australes), based on fluorescent in situ hybridization (FISH), using 18S-28S rDNA, 5S rDNA, and an Arabidopsis-type telomere repeat sequence (A-type TRS). Well separated somatic chromosomes were prepared from colchicine-treated root meristems, using an enzymatic digestion technique. Statistical analyses performed on chromosome-arm lengths, centromeric indices, and interstitial rDNA and telomeric positions were based on observations from 6 well-separated metaphase cells from each of 3 unrelated trees. Statistically, 7 of the 12 loblolly pine chromosomes could be distinguished by their relative lengths. Centromeric indices were unable to distinguish additional chromosomes. However, the position and relative strength of the rDNA and telomeric sites made it possible to uniquely identify all of the chromosomes, providing a reference karyotype for use in comparative genome analyses. A dichotomous key was developed to aid in the identification of loblolly pine chromosomes and their comparison to chromosomes of other Pinus spp. A cytomolecular map was developed using the interstitial 18S-28S rDNA and A-type TRS signals. A total of 54 bins were assigned, ranging from 3 to 5 bins per chromosome. This is the first report of a chromosome-anchored physical map for a conifer that includes a dichotomous key for accurate and consistent identification of the P. taeda chromosomes.

scholarly journals A Consensus Map for Loblolly Pine (Pinus taeda L.). I. Construction and Integration of Individual Linkage Maps From Two Outbred Three-Generation Pedigrees

Genetics ◽  
1999 ◽  
Vol 151 (1) ◽  
pp. 321-330 ◽  
Author(s):  
Mitchell M Sewell ◽  
Bradley K Sherman ◽  
David B Neale
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Fragment Length Polymorphism ◽  
Random Amplified Polymorphic Dna ◽  
Mapping Function ◽  
Genetic Maps ◽  
Linkage Data ◽  
Linkage Maps ◽  
Consensus Map ◽  
Pinus Taeda L

Abstract A consensus map for loblolly pine (Pinus taeda L.) was constructed from the integration of linkage data from two unrelated three-generation outbred pedigrees. The progeny segregation data from restriction fragment length polymorphism, random amplified polymorphic DNA, and isozyme genetic markers from each pedigree were recoded to reflect the two independent populations of parental meioses, and genetic maps were constructed to represent each parent. The rate of meiotic recombination was significantly greater for males than females, as was the average estimate of genome length for males {1983.7 cM [Kosambi mapping function (K)]} and females [1339.5 cM(K)]. The integration of individual maps allows for the synthesis of genetic information from independent sources onto a single consensus map and facilitates the consolidation of linkage groups to represent the chromosomes (n = 12) of loblolly pine. The resulting consensus map consists of 357 unique molecular markers and covers ∼1300 cM(K).

Long-term effects of stand density management and genotype on wood properties of loblolly pine (Pinus taeda L.) in the mid-South USA

2021 ◽  
Vol 491 ◽  
pp. 119176
Author(s):  
Michael A. Blazier ◽  
Thomas Hennessey ◽  
Laurence Schimleck ◽  
Scott Abbey ◽  
Ryan Holbrook ◽  
...  
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Stand Density ◽  
Wood Properties ◽  
Long Term Effects ◽  
Stand Density Management ◽  
Pinus Taeda L

scholarly journals Comparative Dynamics of Above-Ground Litter Production and Decomposition from Eucalyptus Grandis Hill ex Maiden and Pinus Taeda L., and Their Contribution to Soil Organic Carbon

Forests ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 349
Author(s):  
Andrés Baietto ◽  
Jorge Hernández ◽  
Amabelia del Pino
Keyword(s):  
Pinus Taeda ◽  
Decomposition Rate ◽  
Methodological Approach ◽  
Eucalyptus Grandis ◽  
Isotopic Analysis ◽  
Forest Litter ◽  
First Year ◽  
Litter Production ◽  
Forest Species ◽  
Pinus Taeda L

The replacement of native pasture by exotic commercial forest species is an infrequent situation worldwide. In these systems, a new component is introduced, forest litter, which constitutes one of the main ways of incorporating carbon into the soil–plant system. The present work seeks to establish a methodological approach to study the dynamics of litter production and decomposition in an integrated way. The general objective was to characterize and compare the litter production dynamics in 14-year-old Eucalyptus grandis Hill ex Maiden and Pinus taeda L. commercial plantations. During two years, seasonal evaluations of fall, decomposition and accumulation of litter were carried out in stands of both species. In turn, the contribution of carbon from forest species to the soil through isotopic analysis techniques was quantified. Litterfall in E. grandis showed maximums during the spring of the first year and in the spring and summer of the second. In P. taeda, the maximums occurred in summer of the first year and in autumn of the second. In relation to the decomposition rate, the results based on short periods of evaluation between 15 and 21 months did not show differences between species, nor for the different moments of beginning of the evaluation, obtaining average values of 0.0369 month−1 for E. grandis and 0.0357 month−1 for P. taeda. In turn, both the decomposition rate of the material as a whole and the estimates of accumulated biomass in equilibrium state did not show significant differences between the species. Additionally, there was a relevant incorporation of carbon into the soil by forest species, fundamentally in the first few centimeters, substituting an important proportion of the carbon inherited by the original cover of native pastures. Finally, it is necessary to specify that the scope of the findings obtained is greatly limited by the sample size used in this study.

scholarly journals Edaphic and Topographic Factors and their Relationship with Dendrometric Variation of Pinus Taeda L. in a High Altitude Subtropical Climate

2018 ◽  
Vol 42 (0) ◽  
Author(s):  
Taciara Zborowski Horst ◽  
Ricardo Simão Diniz Dalmolin ◽  
Alexandre ten Caten ◽  
Jean Michel Moura-Bueno ◽  
Luciano Campos Cancian ◽  
...  
Keyword(s):  
High Altitude ◽  
Pinus Taeda ◽  
Subtropical Climate ◽  
Topographic Factors ◽  
Pinus Taeda L
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