Download scientific diagram | Localização do povoamento de Eucalipto Urograndis, no Distrito Federal. from publication: Density probability functions to . Samples of Eucalyptus urograndis and Eucalyptus grandis sawdust were autohydrolyzed in aqueous conditions to reach temperatures in the range °C. La parcela experimental consistió en una planta de eucalipto con una fila o dos de un eucalypt (Eucalyptus urograndis, hybrid of E. grandis Hill ex Maid. and.

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Physiological responses to glyphosate are dependent on Eucalyptus urograndis genotype. Two experiments were conducted to evaluate the response of Eucalyptus urograndis genotypes C and GG to glyphosate in growth chambers. As glyphosate dose increased 18 up to g ae ha-1CO2 assimilation rate, transpiration rate, and stomatal conductance decreased fastest and strongest in Selective Herbicides for Cultivation of Eucalyptus urograndis Clones.

Directory of Open Access Journals Sweden. Full Text Available Competition control is essential for successful eucalyptus plantation establishment, yet few selective herbicides have been identified. Five herbicides, flumioxazin, imazamox, imazapic, oxyfluorfen, and sulfometuron methyl, were evaluated for selective weed control in the establishment of genetically modified frost tolerant Eucalyptus urograndis clones.

Herbicides were applied at two or three rates, either before or after weed emergence, and compared to a nontreated control and to near-complete weed control obtained with glyphosate directed sprays.

Applications prior to weed emergence were most effective for weed control and, with the exception of imazapic, all resulted in enhanced eucalyptus growth relative to the nontreated control.

Among postemergent treatments, only imazamox enhanced stem volume. This research found the previously nontested herbicides imazamox and imazapic to be effective for selective weed control and refined application rate and timing of five herbicides for use in clonal plantations. Effects of autohydrolysis of Eucalyptus urograndis and Eucalyptus grandis on influence of chemical components and crystallinity index. In each minireactor were used a liquor: The content of extractives, lignin, holocellulose, cellulose, hemicelluloses and crystallinity index obtained from the solid fraction after autohydrolysis of sawdust were determined.

The lignin content decreased, while the extractives content increased. It was defined that during autohydrolysis, had a slight decreased on crystalline structure of cellulose of Eucalyptus urogandis and Eucalyptus grandis.

Full Text Available http: The amount determination of nutrients of forest species was carried out in the treatments: On the other hand, for corn, it was carried out in all treatments E; A, 50E: The delimitation adopted was the one of a randomized block with three replications. The magnitude of the nutrient pool in the agrossilvicultural systems biomass was: Due to the great export of nutrients through the corn harvest, residues should be kept and it is necessary to make a nutritional reposition, mainly with P, N, K, S and Zn in the following crops, because of the higher amount that are exported with the extraction of the corn tang, which reaches Classification of Eucalyptus urograndis hybrids under different water availability based on biometric traits.

Full Text Available Aim of study: The eucalyptus grows rapidly and is well suitable to edaphic and bioclimatic conditions in several regions of of the world. The aim of this study was to assess the performance of Eucalyptus urograndis hybrids grown under different water availability conditions. The study was performed in south-eastern of BrazilMaterial and Methods: The evaluation was based on the following characteristics: All the characteristics evaluated were adversely affected by reduced availability of water in the substrate.

eucalyptus urograndis caracterizacao: Topics by

The hybrids assessed performed differently in terms of biometric characteristics, irrespective of water availability. Water deficit resulted eucalupto a greater reduction in the dry weight production compared to number of leaves, diameter and height. Hybrids H2 and H5 have favorable traits for tolerating drought. The results obtained in our experiment show that productive hybrids sensitive to drought could also perform better under water deficit conditions, maintaining satisfactory growth despite significant drops in these characteristics.


Eucalyptus urograndis ; water deficit; drought tolerance. Full Text Available The study had as objective compare the nutrients content in the different species involved in monospecific and mixed stands of Eucalyptus urograndis and Acacia mearnsii and in a consortium with Zea mays.

The experimental design was a randomized block design with three replications. Forests species sampling was made in average tree in each plot, based on diameter at breast height DBH, in three trees six month-old per treatment. Within all treatments and your replicates, installed one subplot with long 3.

With the exception of Ca, which was more concentrated in the eudalipto fraction and Mg and B in the bark and leaves, the other nutrients in Eucalyptus urograndisso in monoculture much in mixed stands, contained higher concentration just in leaves.

The grain component has the highest concentrations of nitrogen and phosphorus, as straw and cob have the highest potassium concentration and the leaf component has the largest concentrations of other nutrients. The forest species did not influence significantly the levels of nutrients in components of aboveground biomass of maize.

Characterization of O-acetil- 4-O-methylglucurono xylans urogarndis Eucalyptus urograndis. The O-acetyl- 4-O-methyl- glucurono xylans were isolated from E. These xylans contained one 4-O-methyl-glucuronic acid substituent and 5.

Selective Herbicides for Cultivation of Eucalyptus urograndis Clones

The weight-average molar mass and polydispersity of this xylan were O experimento foi alocado em delineamento de medidas repetidas, com os arranjos: Dois clones – H e H; seis tratamentos – T1: Os dados foram coletados em um plantio de Eucalyptus urograndis em Turmalina, MG. Evaluation of hypsometers and operators in measuring tree heights in Eucalyptus urograndis with different sizesAbstract: The accurate mensuration of tree hight is very important in forest science because it influences directly the individual tree volume, stand volume prediction and all the prognosis system.

Due to the fact it is made indirectly, errors can occur, and they should be minimized. Hence, one should use hypsometers, which lead to a minor error and a trained operator to do it. This study aims to test the accuracy urograndia hypsometers and. Full Text Available The pursuit of sustainable systems of soil management has led researchers to develop new techniques of cultivation.

Among them, studies with forest species able to fix atmospheric N2 and increase C and N stocks in labile urograndiz stable soil organic matter SOM stand out in Brazil. The eucaoipto indicated that the short rotation eucalyptus cultivation reduced total organic carbon stocks, total nitrogen, C and N in the humic substances, and N storage in the microbial biomass compared to Acacia mangium soil.

The cultivation of Acacia mangium and the increase of the eucalyptus rotation time increased stocks of C and N of the labile C-LOM, N-LOM and C-MB and stable fractions C and N in humic substances indicating a significant recovery of their stocks to levels approaching those original native, and higher than stocks obtained in the soil of short rotation eucalypt.

Full Text Available The objective of this study was to evaluate the control of weeds in the rows of eucalyptus Eucalyptus urograndis with herbicides applied singly or combined with boron B, as well as, the response of Eucalyptus plants to this micronutrient. The experiments were carried out in a split-plot wucalipto randomized complete block design, with three replicates. Six treatments were applied to the plots: The addition of boric acid in the solution containing the herbicides did not affect the weed control.

There was an increase in boron content in the soil and consequently an increase in the boron levels in the eucalyptus leaves.

The combined application of herbicides plus boric acid is perfectly suitable for preventing dry of the pointer on eucalyptus plants. Eucalyptus urograndis ; chemical control; herbicides; micronutrients; Urochloa decumbens.

Validation of reference genes from Eucalyptus spp. Full Text Available Abstract Background The genus Eucalyptus consists of approximately species and subspecies and has a physiological plasticity that allows some species to propagate in different regions of the world.


International Journal of Forestry Research

Eucalyptus is a major source of cellulose for paper manufacturing, and its cultivation is limited by weather conditions, particularly water stress and low temperatures. Gene expression studies using quantitative reverse transcription polymerase chain reaction urograndos require reference genes, which must have stable expression to facilitate the comparison of the results from analyses using different species, tissues, and treatments.

Such studies have been limited in eucalyptus. Except for treatment with light, which examined the seedling hypocotyl or apical portion of the stem, the expression analyses were conducted in the apical and basal parts of the stem. To ecalipto the best pair of genes, the bioinformatics tools GeNorm and NormFinder were compared. IDH was the most stable gene in all of the treatments.

urgrandis Conclusion Comparing these results with ufograndis of other studies on eucalyptuswe concluded that five genes are stable in different species and experimental conditions: It is usually recommended a minimum of two reference genes is expression analysis; therefore, we propose that IDH and two others genes among the five identified. Os resultados obtidos demonstraram que salvo C. Glycaspis brimblecombei Moore, also known as red gum lerp psyllid, is characterized to be specific to the genus Eucalyptus.

This work aimed to evaluate G. Eucalyptus species used in this study were: Initially replications nymphs per treatment Eucalyptus species were prepared.

The evaluations were daily and. Ultra-high performance liquid chromatography coupled to mass spectrometry applied to the identification urogrands valuable phenolic compounds from Eucalyptus wood. Ultra-high performance liquid chromatography UHPLC was applied for the first time in the analysis of wood extracts. The potential of this technique coupled to ion trap mass spectrometry in the rapid and effective detection and identification of bioactive components in complex vegetal samples was demonstrated.

Several dozens of compounds were detected in less than 30min of analysis time, corresponding to more than 3-fold reduction in time, when compared to conventional HPLC analysis of similar extracts. The phenolic chemical composition of Eucalyptus grandis, Eucalyptus urograndis E.

Twenty of these compounds are reported for the first time as Eucalyptus genus components. Ellagic acid and ellagic acid-pentoside are the major components in all extracts, followed by gallic and quinic acids in E. The antioxidant scavenging activity of the extracts was evaluated, with E. Moreover, the antioxidant activity eucaliptoo these extracts was higher than that of the commercial antioxidant BHT and of those of the corresponding bark extracts.

These results, together with the phenolic content values, open good perspectives for the exploitation of these renewable resources as a source of valuable phenolic compounds. Preparation and characterization of nanocomposites of the carboxymethyl cellulose reinforced with cellulose nanocrystals; Preparacao e caracterizacao de nanocompositos de carboximetilcelulose reforcados com nanocristais de eucallipto.

Flauzino Neto, Wilson P. Nanocrystals of cellulose NCC isolated from Eucalyptus urograndis Kraft pulp were used to prepare nanocomposites employing carboxymethyl cellulose CMC as matrix.

The nanocrystals were characterized by X-ray diffraction to evaluate the crystallinity of them. The nanocomposites were characterized by thermal and mechanical analysis.

The improvement in ruograndis properties are attributed to strong interactions between nanoparticles and CMC matrix.

Accidental ingestion of eucalyptus oil by a 3-year-old boy caused profound central nervous system depression within 30 minutes, but he recovered rapidly after gastric lavage. The extreme toxicity of eucalyptus oil is emphasised. Chemical composition and fumigant toxicity of the essential oils from 16 species of Eucalyptus against Haematobia irritans Diptera: