Influence of age and planting density on the energy content of Eucalyptus benthamii, Eucalyptus dunnii and Eucalyptus grandis planted in Uruguay

New Forests ◽  
2019 ◽  
Vol 51 (4) ◽  
pp. 631-655
Author(s):  
Fernando Resquin ◽  
Rafael M. Navarro-Cerrillo ◽  
Leónidas Carrasco-Letelier ◽  
Cecilia Rachid-Casnati
Keyword(s):  
Energy Content ◽  
Eucalyptus Grandis ◽  
Planting Density ◽  
Eucalyptus Dunnii

scholarly journals Painéis Compensados Fabricados com Lâminas de Três Espécies de Eucaliptos

2017 ◽  
Vol 24 (0) ◽  
Author(s):  
Sandra Kazmierczak ◽  
Everton Hillig ◽  
Setsuo Iwakiri
Keyword(s):  
Eucalyptus Grandis ◽  
Eucalyptus Urophylla ◽  
Eucalyptus Saligna ◽  
Eucalyptus Dunnii ◽  
E 32

RESUMO O objetivo foi analisar a qualidade de painéis compensados produzidos com lâminas de Eucalyptus saligna, Eucalyptus dunnii e o híbrido Eucalyptus urophylla x Eucalyptus grandis, em diferentes composições de misturas. Foram produzidos painéis com 500 × 500 × 14 mm e sete camadas de lâminas, coladas com fenol-formaldeído (FF), na gramatura de 360 g. m-2 em linha dupla e teores de sólidos de 28% e 32%. A prensagem dos painéis foi realizada a 130 °C, 12 kgf. cm-2 e 15 minutos. Analisaram-se as propriedades massa específica, umidade, absorção d’água, inchamento em espessura, cisalhamento na linha de cola e flexão estática. Os resultados foram comparados aos requisitos do catálogo técnico da ABIMCI e das normas EN 314-2 e DIN 68792. Os painéis de Eucalyptus dunnii apresentaram menores valores de propriedades mecânicas, com tendência de aumento quando em misturas. Os painéis de Eucalyptus saligna e do híbrido Eucalyptus urophylla x Eucalyptus grandis apresentaram bons resultados, tanto puros como em mistura com as outras espécies.

scholarly journals Dynamics of initial spacing on the diameter of hybrid Eucalyptus grandis x Eucalyptus urophylla in a systematic design

2021 ◽  
pp. 422-430
Author(s):  
Mirella Basileu de Oliveira Lima ◽  
Mauro Eloi Nappo ◽  
Kálita Luis Soares ◽  
Renato Vinícius Oliveira Castro ◽  
Eder Pereira Miguel ◽  
...  
Keyword(s):  
Eucalyptus Grandis ◽  
Planting Density ◽  
Diameter Distribution ◽  
Eucalyptus Urophylla ◽  
Central Brazil ◽  
Kolmogorov Smirnov ◽  
Diameter Structure ◽  
Initial Spacing ◽  
Hybrid Eucalyptus

We evaluated the effect of initial spacing on the distribution of Eucalyptus grandis x Eucalyptus urophylla tree diameters in a Nelder wheel design. The study area was in west-central Brazil. A Nelder wheel design with three repetitions was used. This design provides 432 planting spots per plot/repetition. Planting density varied from 0.50 m² to 41.25 m². The diameter at breast height was measured for all plants every four months until 36 months of age, totaling eight measurements. The description of the diameter distribution was developed by fitting probability density functions for each spacing and age. The quality of fit was evaluated using the root mean square error percentage, Pearson’s correlation coefficient, and the Kolmogorov-Smirnov test (α < 0.05). The spacings up to 1.17 m² must be harvested in less than two years, since it is noted that in the third year the increment in diameter is static and the mortality rate increases. The spacing highly affects the diameter structure of the population, impelling the forester to consider different uses for the wood. For wood requiring larger diameters, spacing above 8.69 m² per tree is recommended

Zoning Based on Climate and Soil for Planting Eucalyptus in Southern Region of Rio Grande do Sul State, Brazil

2011 ◽  
pp. 127-143
Author(s):  
José Alba ◽  
Marcos Wrege ◽  
Marilice Garrastazu
Keyword(s):  
Sustainable Use ◽  
Eucalyptus Grandis ◽  
Rio Grande ◽  
Southern Region ◽  
Temperate Climate ◽  
Eucalyptus Species ◽  
Rio Grande Do Sul ◽  
Eucalyptus Dunnii ◽  
Legal Restrictions ◽  
Positive Step

Zoning based on climate and soil characteristics does not represent a full ecological-economic zoning procedure, as the Brazilian law establishes, but it is a positive step forward toward a sustainable use of natural resources. The Embrapa Temperate Climate Research Center has developed, with the collaboration of several entities from Brazil and Uruguay, a zoning procedure based on climate and soil for planting eucalyptus in southern region of Rio Grande do Sul State covering a total area greater than 3,5 million hectares. Three eucalyptus species were considered: Eucalyptus grandis W. Hill ex Maiden, Eucalyptus dunnii Maiden and Eucalyptus globulus Labill. Data were processed and integrated through statistical procedures and by using a GIS. The potential surface area for forestry surpasses 900,000 hectares, but a homogeneous exploitation of that territory is limited by legal restrictions.

scholarly journals PRODUÇÃO DE PAINEL COMPENSADO ESTRUTURAL DE Eucalyptus grandis E Eucalyptus dunnii

FLORESTA ◽  
2007 ◽  
Vol 37 (3) ◽  
Author(s):  
Setsuo Iwakiri ◽  
Sidon Keinert Júnior ◽  
José Guilhrme Prata ◽  
Silviana Rosso
Keyword(s):  
Eucalyptus Grandis ◽  
Eucalyptus Dunnii

Este trabalho foi desenvolvido com o objetivo de avaliar o potencial de utilização de lâminas de Eucalyptus grandis e Eucalyptus dunnii para produção de painéis compensados estruturais. Os painéis foram produzidos com diferentes formulações de adesivo à base de resina fenol-formaldeído. Os resultados indicaram que as diferentes formulações do adesivo não afetam de forma clara a resistência da linha de cola. Entre as espécies, os painéis de E. grandis apresentaram maiores valores de resistência da linha de cola em comparação aos painéis de E. dunnii. Os valores médios de MOR das duas espécies foram estatisticamente iguais. Os resultados das propriedades mecânicas avaliadas apontam que o E. grandis e E. dunnii são espécies com grande potencial para produção de painéis compensados estruturais.

scholarly journals Variability and Plasticity in Cuticular Transpiration and Leaf Permeability Allow Differentiation of Eucalyptus Clones at an Early Age

Forests ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 9 ◽  
Author(s):  
André Carignato ◽  
Javier Vázquez-Piqué ◽  
Raúl Tapias ◽  
Federico Ruiz ◽  
Manuel Fernández
Keyword(s):  
Water Stress ◽  
Drought Resistance ◽  
Stomatal Density ◽  
Stomatal Closure ◽  
Eucalyptus Grandis ◽  
Leaf Traits ◽  
Improvement Program ◽  
Stomatal Control ◽  
Cuticular Transpiration ◽  
Eucalyptus Dunnii

Background and Objectives. Water stress is a major constraining factor of Eucalyptus plantations’ growth. Within a genetic improvement program, the selection of genotypes that improve drought resistance would help to improve productivity and to expand plantations. Leaf characteristics, among others, are important factors to consider when evaluating drought resistance evaluation, as well as the clone’s ability to modify leaf properties (e.g., stomatal density (d) and size, relative water content at the time of stomatal closure (RWCc), cuticular transpiration (Ec), specific leaf area (SLA)) according to growing conditions. Therefore, this study aimed at analyzing these properties in nursery plants of nine high-productivity Eucalyptus clones. Material and Methods: Five Eucalyptus globulus Labill. clones and four hybrids clones (Eucalyptus urophylla S.T. Blake × Eucalyptus grandis W. Hill ex Maiden, 12€; Eucalyptus urograndis × E. globulus, HE; Eucalyptus dunnii Maiden–E. grandis × E. globulus, HG; Eucalyptus saligna Sm. × Eucalyptus maidenii F. Muell., HI) were studied. Several parameters relating to the aforementioned leaf traits were evaluated for 2.5 years. Results: Significant differences in stomatal d and size, RWCc, Ec, and SLA among clones (p < 0.001) and according to the dates (p < 0.001) were obtained. Each clone varied seasonally the characteristics of its new developing leaves to acclimatize to the growth conditions. The pore opening surface potential (i.e., the stomatal d × size) did not affect transpiration rates with full open stomata, so the water transpired under these conditions might depend on other leaf factors. The clones HE, HG, and 12€ were the ones that differed the most from the drought resistant E. globulus control clone (C14). Those three clones showed lower leaf epidermis impermeability (HE, HG, 12€), higher SLA (12€, HG), and lower stomatal control under moderate water stress (HE, HG) not being, therefore, good candidates to be selected for drought resistance, at least for these measured traits. Conclusions: These parameters can be incorporated into genetic selection and breeding programs, especially Ec, SLA, RWCc, and stomatal control under moderate water stress.

Effect of Red Extractives of Plantation Leaves on Bamboo Biomass Mildewing

2011 ◽  
Vol 704-705 ◽  
pp. 419-423
Author(s):  
Feng Juan Wu ◽  
Wan Xi Peng ◽  
Dao Chun Qin ◽  
Fang Lu
Keyword(s):  
Key Words ◽  
Pinus Taeda ◽  
Spore Germination ◽  
Eucalyptus Grandis ◽  
Value Added ◽  
Santalum Album ◽  
Tree Leaves ◽  
Osmanthus Fragrans ◽  
Eucalyptus Dunnii ◽  
Outdoor Test

Bamboo is so easy to get mildewed that bamboo products are still low value added. Therefore, the effect of red extractives from 28 tree leaves on bamboo biology mildewing was studied basing on full-factor test. The result was as follows: (1) most red extractives of tree leaves can inhibit the growth of P. expansum, but a few can inhibit the growth of A. alternate; (2) The red extractives from tree leaves of Deodar cedar, Eucalyptus grandis, Eucalyptus dunnii and pear were the most effective to control spore germination of P. expansum, and those of Manglietia glauca, Osmanthus fragrans, and Melia toosendanin were the most effective to control spore germination of A. alternata; (3) The effect of the red extractives from Pinus taeda, Eucalyptus grandis and Santalum album on bamboo biomass mildewing was highly remarkable on mildew-proof by outdoor test. Our result pointed out the direction for the development of the biological mildew inhibitor from tree leaves. Key words. tree leaves, bamboo biomass, benzene/alcohol extractives

scholarly journals Efeito da poda sobre a qualidade da madeira de Eucalyptus dunnii, Eucalyptus grandis e Eucalyptus saligna

2017 ◽  
Vol 45 (114) ◽  
Author(s):  
Rafael Leite Braz ◽  
Leif Nutto ◽  
Jorge Luis Monteiro de Matos
Keyword(s):  
Eucalyptus Grandis ◽  
Eucalyptus Saligna ◽  
Eucalyptus Dunnii

scholarly journals Stand biomass estimation methods for Eucalyptus grandis and Eucalyptus dunnii in Uruguay

2021 ◽  
Vol 42 (1) ◽  
pp. 53-66
Author(s):  
Andrés Hirigoyen ◽  
Fernando Resquin ◽  
Rafael Navarro Cerrillo ◽  
Jorge Franco ◽  
Cecilia Rachid Casnati
Keyword(s):  
Eucalyptus Grandis ◽  
Estimation Methods ◽  
Biomass Estimation ◽  
Eucalyptus Dunnii

Biomass Production and Nutritional Efficiency in Eucalyptus Genotypes in the Pampa Biome

2019 ◽  
pp. 1-10
Author(s):  
Claudiney Do Couto Guimarães ◽  
Mauro Valdir Schumacher ◽  
Dione Richer Momolli ◽  
Huan Pablo de Souza ◽  
Aline Aparecida Ludvichak ◽  
...  
Keyword(s):  
Biomass Production ◽  
Eucalyptus Grandis ◽  
Annual Increment ◽  
Utilization Coefficient ◽  
Pampa Biome ◽  
Eucalyptus Dunnii ◽  
Biomass Components ◽  
Mean Annual Increment ◽  
Eucalyptus Urograndis

The objective of this work was to determine biomass production and nutritional efficiency in three eucalyptus genotypes in the Pampa Biome. For determination of biomass and nutritional characterization, nine medium trees per genotype were sampled, separated in the components leaf, branch, bark, wood and root. The nutritional efficiency of the biomass components was determined using the biological utilization coefficient (BUC). The highest biomass production and mean annual increment were observed in the Eucalyptus urograndis hybrid with 158 Mg ha-1 and 47.2 m³ ha-1, followed by Eucalyptus grandis with 137 Mg ha-1 and 39.7 m³ ha-1 and Eucalyptus dunnii with 122 Mg ha-1 and 23.2 m³ ha-1. For wood, the best nutritional efficiency was provided by Eucalytpus urograndis for P, Ca, and Mn, followed by Eucalytpus grandis for N and Mg, and Eucalytpus dunnii for K.

scholarly journals Wood Permeability in Eucalyptus grandis and Eucalyptus dunnii

2017 ◽  
Vol 25 (1) ◽  
Author(s):  
Raphael Nogueira Rezende ◽  
José Tarcísio Lima ◽  
Luana Elís de Ramos e Paula ◽  
Paulo Ricardo Gherardi Hein ◽  
José Reinaldo Moreira da Silva
Keyword(s):  
Eucalyptus Grandis ◽  
Eucalyptus Dunnii
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