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Desarrollo de una plantación de Eucalyptus globulus establecida en primavera con diferentes tratamientos de riego
Bosque (Valdivia) , 2005, DOI: 10.4067/S0717-92002005000300012
Abstract: the effect of irrigation on the development of a eucalyptus globulus labill plantation in spring was evaluated. the influence of irrigating at the time of plantation with two and three liters of water and again during the critical period with zero to two liters of water was analyzed using a 2*2 factorial design. the study was carried out in the coastal zone of central chile. the seedlings were planted during the spring of 1993 (october). during this period the soil temperature reached 13.5oc at 10 cm depth. the critical period was defined as the time of highest aridity levels (january). two months prior to planting a furrow 5 cm deep and 60 cm wide was made over the plantation row with an animal drawn plough to control weeds. the seedlings used were 1/0, produced in containers with an average root collar diameter of 0.14 cm and an average height of 12 cm. before planting, a hydrogel was incorporated into the soil in a water based solution at a rate of 1 gram per plant. the seedlings were also fertilized with n, p and k, and a mulch was placed around every seedling. the results obtained after one rotation indicate plants should be irrigated with two liters of water at the time of planting. average seedling survival after 8 years was 70%. mean tree size was 16.2 cm for diameter (dbh) and 19.7 m in height, with a 28 m3ha-1 per year increase in volume.
Efecto de los sistemas de riego en la rentabilidad de plantaciones de eucalipto (Eucalyptus globulus)
Guerra, Emilio;Herrera, Miguel á.;Drake, Fernando;
Agrociencia , 2010,
Abstract: irrigation is used increasingly in establishment of forest plantations in order to increase growth and productivity. the effect on profitability of a eucalyptus (eucalyptus globulus) plantation in the central valley of the bío bío region, chile, of three irrigation systems was studied: microsprinklers (t1), drip irrigation (t2) and surface irrigation (t3). the variable projected to harvest age was the volumetric increase of the trees. to calculate costs of t1 and t2, a database was used of 200 agricultural operations of varying size where these systems were installed and implemented. for t3, current costs of construction and maintenance of the structures required were used for financial evaluation. profitability was determined using net present value (npv), potential land value (plv) and modified internal return rate (mirr). profitability with tl and t2 had negative values; that is, these irrigation techniques did not generate economic benefits. surface irrigation (t3) was profitable for the volume projected to eight and ten years harvest age. the greatest returns were obtained with the three indicators using a discount rate of 8 % and a price of pulp wood of us$ 32 m-3 ssc. npv was us$ 989 ha-1 and us$ 1106 ha-1; plv was us$ 2152 and 2406 ha-1, and mirr was 10.4 % and 10.1 %. these results justify the use of surface irrigation (t3) as an efficient technique in the integrated management of a high-producing eucalyptus plantation.
Efecto de la concentración de nitrógeno sobre atributos morfológicos, potencial de crecimiento radical y estatus nutricional en plantas de Eucalyptus globulus producidas a raíz cubierta Effect of the nitrogen concentration on the morphological attributes, root growth potential and nutritional status on cover root Eucalyptus globulus seedlings  [cached]
Jordán Monsalve,René Escobar,Manuel Acevedo,Manuel Sánchez
Bosque (Valdivia) , 2009,
Abstract: Se evaluó el efecto de la aplicación de cuatro concentraciones de nitrógeno (50, 100, 150 y 200 mg L-1) sobre atributos morfológicos, potencial de crecimiento radical y estatus nutricional de plantas de Eucalyptus globulus producidas a raíz cubierta. La frecuencia de aplicación fue semanal, manteniendo constantes los niveles de los otros macroelementos. Además, se consideró un esquema de riego al 20% de disminución de pérdida de peso de bandeja. Las variables altura de planta y área foliar alcanzaron su máximo valor al fertilizar con 200 mg L-1, mientras que para el diámetro de cuello y número de raíces nuevas los valores obtenidos no difieren estadísticamente al fertilizar con concentraciones de 150 y 200 mg L-1. Para el rango de concentraciones ensayadas se concluye que los mejores resultados se obtienen al fertilizar con 200 mg L-1, ya que produce plantas con un mayor potencial de crecimiento radical y mejores atributos morfológicos, siendo la única desventaja los bajos niveles de nitrógeno foliar obtenidos al finalizar el ensayo. Four nitrogen concentrations (50, 100, 150, and 200 mg L-1) were evaluated on shoot and root growth, root growth potential, and nutritional status of cover root Eucalyptus globulus seedlings. Nutrient solutions were applied on a weekly basis together with irrigation. All other elements were held constant in the nutrient solutions. Irrigation was applied considering a 20% loss of the seedling tray. Plant height and leaf area reached their peak at 200 mg L-1; collar diameter, number and the absolute weight of new roots did not change when concentrations where 150 or 200 mg L-1. For all treatments the best results were obtained when the fertilization was made with 200 mg L-1 because it produced plants with higher root growth potential and better morphological attributes, with the only disadvantage of low levels of foliar nitrogen obtained at the end of the essay.
Inonotus splitbergeri a stem pathogen of Eucalyptus globulus in Uruguay
Fitopatologia Brasileira , 2002, DOI: 10.1590/S0100-41582002000400017
Abstract: inonotus splitbergeri é relatado pela primeira vez o uruguay causando podridáo-do-lenho de eucalyptus globulus. durante as tempestades ocorre o tombamento de árvores, mesmo daquelas totalmente enfolhadas.
Inonotus splitbergeri a stem pathogen of Eucalyptus globulus in Uruguay  [cached]
Fitopatologia Brasileira , 2002,
Abstract: Inonotus splitbergeri é relatado pela primeira vez o Uruguay causando podridáo-do-lenho de Eucalyptus globulus. Durante as tempestades ocorre o tombamento de árvores, mesmo daquelas totalmente enfolhadas.
Comparación del cariotipo de Eucalyptus globulus y Eucalyptus cladocalyx (Myrtaceae) Comparison of karyotype of Eucalyptus globulus and Eucalyptus cladocalyx (Myrtaceae)
Freddy Mora,Claudio Palma-Rojas,Pedro Jara-Seguel
Agricultura Técnica , 2005,
Abstract: Se analizaron placas metafásicas mitóticas de Eucalyptus globulus Labill. y Eucalyptus cladocalyx F. Muell. Los cromosomas se observaron mediante aplastado de meristemas radiculares, previamente tratados con 8-Hidroxiquinolina y te idos con la reacción de Feulgen. Las dos especies mostraron un cariotipo 2n = 22, con un nivel de simetría 1A y con tama os cromosómicos que variaron entre 0,68 y 2,03 m m. El tama o cromosómico promedio difirió significativamente al comparar entre E. globulus (1,42 m m) y E. cladocalyx (1,02 m m) (P < 0,01). El mayor tama o cromosómico de E. globulus sugiere una mayor cantidad de ADN, originado probablemente por alteraciones cromosómicas estucturales. Este patrón de evolución del cariotipo estaría asociado, además, con un alto nivel de conservación en la morfología cromosómica. Mitotic metaphase plates were analyzed in Eucalyptus globulus Labill. and Eucalyptus cladocalyx F. Muell. The chromosomes were observed by squashing root tips, pre-treated with 8-Hydroxyquinoline and stained with the Feulgen reaction. Both, E. globulus and E. cladocalyx had a karyotype of 2n = 22, with 1A symmetry level, and chromosome sizes varying between 0.68 and 2.03 m m. Mean chromosome size differed significantly between E. cladocalyx (1.42 m m) and E. globulus (1.02 m m) (P < 0.01). The greater chromosomal size of E. globulus suggests a greater amount of DNA, probably originated by structural alterations. This evolutionary pattern of karyotype morphology might be associated, as well, with a high level of conservation in chromosome morphology.
RAPD and freezing resistance in Eucalyptus globulus
Fernández R.,Marta; Valenzuela A.,Sofía; Balocchi L.,Claudio;
Electronic Journal of Biotechnology , 2006,
Abstract: eucalyptus globulus is the second most important forest species in chile, after pinus radiata. the main advantages of e. globulus are its fast growth (25 m3/ha/year) and its excellent wood quality for kraft pulp production. on the negative side, its low freezing tolerance has been an obstacle for the expansion of plantations, specifically on the foothills of the andes. the difference in the freezing resistance between clones of e. globulus has a genetic base and, therefore, it could be detected through dna molecular markers. fifteen clones of e. globulus, eight classified as freezing resistant and seven as freezing sensitive were analyzed using the technique of rapd, in order to obtain molecular markers that could differentiate between freezing sensitive and resistant clones. eighteen primers amplified reproducible bands. three bands were only present in freezing resistant clones, two bands of 768 bp, 602 bp obtained with ubc 218 primer and one band of 248 bp obtained with ubc 237 primer. the preliminary results indicate that polymorphism can be observed with the primers employed, but it is not possible to associate the bands with the cold resistance or susceptibility in e. globulus.
Eucalyptus (Eucalyptus Globulus): Malaria Tree
Trakya Universitesi Tip Fakultesi Dergisi , 2002,
Abstract: Eucalyptus belongs to the Myrtles family and its homeland is Australia and Tazmania. It is very easy to grow this tree, and some species can reach heights over 60-70 meters. As its roots widely spread, large quantities of water can be absorbed, which is of great help in drying swaps, particularly in malaria-struck countries; hence the name, malaria tree. In addition, eucalyptus oil together with menthol is used as an ingredient of pastilles to relieve cold-related complaints. Eucalyptus was first imported from Europe to Turkey during the Ottoman empire. Attempts were made to grow this tree for the drying of swaps and prevention of malaria in Edirne, where malaria had been a serious problem. People were enlightened about the benefits of Eucalyptus via articles published in an official newspaper of the city.
Combining ability of elite clones of Eucalyptus grandis and Eucalyptus urophylla with Eucalyptus globulus
Bison, Odair;Ramalho, Magno Antonio Patto;Rezende, Gabriel Dehon Sampaio Pe?anha;Aguiar, Aurélio Mendes;Resende, Marcos Deon Vilela de;
Genetics and Molecular Biology , 2007, DOI: 10.1590/S1415-47572007000300019
Abstract: in brazil, eucalyptus breeding programs for cellulose production has used two species, eucalyptus grandis and eucalyptus urophylla. nevertheless, it would be useful to introgress alleles from other species to improve wood quality and volume. the objective of this research was to evaluate the hybrid potential of elite clones of e. grandis and e. urophylla from the aracruz celulose company s. a. with eucalyptus globulus clones. to do so, six elite clones were crossed with ten e. globulus clones in a half-diallel mating design. the resulting hybrid combinations as well as the four check clones were evaluated in randomized complete block experiments with single plant plots and 40 replicates from september to october 2001 at three brazilian sites, aracruz and s?o mateus in the espírito santo state and caravelas in bahia state. two years later the circumference at breast height (cbh) and the wood density (wd) were measured. the means were submitted to diallel analysis according to the griffing method (1956), adapted by geraldi and miranda filho (1988). although the number of clones involved was small, the crossings of elite clones of e. grandis and e. urophylla with clones of e. globulus were promising, especially for wood quality gains.
Efecto del fotoperíodo en el desarrollo de plantas de Eucalyptus globulus Labill. ssp. globulus cultivadas en vivero Effect of photoperiod on the development of Eucalyptus globulus Labill. ssp. globulus plants cultured in a nursery  [cached]
Bosque (Valdivia) , 2003,
Abstract: Plantas de Eucalyptus globulus Labill. ssp. globulus producidas a raíz cubierta y de aspecto morfológico homogéneo fueron tratadas con un fotoperíodo corto de 8 h durante 7 y 15 días. El efecto fue comparado con un fotoperíodo normal de vivero de 10 horas (tratamiento control) y evaluado a través de los métodos de conductividad electrolítica relativa (CER), contenido de carbohidratos solubles totales (CST) y potencial de crecimiento radicular (RGP). Los resultados indicaron que la reducción del fotoperíodo por 7 días disminuyó significativamente el contenido de carbohidratos solubles totales, el cual aumenta a niveles similares al control, cuando se incrementa el tiempo de aplicación del tratamiento. El manejo del fotoperíodo no tuvo efecto sobre la conductividad electrolítica relativa y el potencial de crecimiento radicular. Eucalyptus globulus Labill. ssp. globulus seedlings produced in containers under homogeneous morphological conditions were treated with short photoperiods of 8 hours for 7 and 15 days. The effect was compared with that of a normal photoperiod of 10 hours in a nursery (treatment control), and evaluated using three methods: the relative electrolytic conductivity (CER), the content of total soluble carbohydrates (CST), and root growth potential (RGP). The reduction of the photoperiod for 7 days significantly diminished the content of total soluble carbohydrates, but this increased to levels similar to the control after 15 days of the reduced photoperiod. There was no effect of photoperiod on the relative electrolytic conductivity or root growth potential.
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