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Variabilidad topográfica y edáfica en bosques de Nothofagus betuloides (Mirb) Blume, en el suroeste de Tierra del Fuego, Chile
THIERS,OSCAR; GERDING,VICTOR;
Revista chilena de historia natural , 2007, DOI: 10.4067/S0716-078X2007000200006
Abstract: we examined the topographic and edaphic variability of sites dominated by nothofagus betuloides and associated tree species in southwestern tierra del fuego. edaphic and topographic characteristics were analyzed using bivariate and multivariate statistical methods. the relationships between soil and topography were strongly related to climatic characteristics (temperature and humidity) of different sites. soils with the highest degree of fertility, deep and well drained, were located at the lowest elevations (< 150-200 m) and had gentle slopes (< 5 %). pure forests of n. betuloides occurred in a wide topographic range with high soil variation. the different associations of n. betuloides, with the species n. pumilio, n. antárctica and drimys winteri, occupy more specific site conditions. nothofagus betuloides - n. pumilio occurred mostly in the most favorable sites with fertile soils. nothofagus betuloides - n. antárctica occurred at higher elevations, and steeper slopes, characterized by very thin soils. nothofagus betuloides - d. winteri occurred in coastal lowlands, with greater humidity and heavier rainfall, and deep soils with limited drainage
Express o do Antígeno Nuclear de Prolifera o Celular no Lóbulo Mamário sob Tratamento com Anticoncepcional Oral
Gon?alves Thiers Deda
Revista Brasileira de Ginecologia e Obstetrícia , 2001,
Abstract:
Variabilidad topográfica y edáfica en bosques de Nothofagus betuloides (Mirb) Blume, en el suroeste de Tierra del Fuego, Chile Edaphic and topographic variability in Nothofagus betuloides (Mirb) Blume forests, in southwestern Tierra del Fuego, Chile
OSCAR THIERS,VICTOR GERDING
Revista chilena de historia natural , 2007,
Abstract: Se investigó la variabilidad de las relaciones topográficas y edáficas en sitios con presencia de Nothofagus betuloides y especies arbóreas asociadas en el suroeste de Tierra del Fuego. Estas relaciones se analizaron con métodos estadísticos bivariados y multivariados. Las relaciones del suelo con la topografía estarían fuertemente ligadas a características climáticas (temperatura y humedad) de los sitios. Los suelos más fértiles por su mayor profundidad y mejor drenaje, se ubicaron en terrenos de menor elevación (< 150-200 m) y pendiente (< 5 %). Los bosques puros de N. betuloides se desarrollan en un amplio rango topográfico, con mayor variación de suelos. Las diferentes asociaciones de N. betuloides con las especies N. pumilio, N. antractica y Drimys winteri se presentan en ambientes particulares. Nothofagus betuloides-N. pumilio ocupa mayoritariamente sitios más favorables con suelos más fértiles. Nothofagus betuloides-N. antárctica se ubica en terrenos de mayor elevación y mayor pendiente, con suelos muy delgados. Nothofagus betuloides-D. winteri se presenta en los terrenos de menor elevación cercanos a la costa, con mayor humedad ambiental y precipitaciones, y suelos más profundos con menor drenaje interno We examined the topographic and edaphic variability of sites dominated by Nothofagus betuloides and associated tree species in southwestern Tierra del Fuego. Edaphic and topographic characteristics were analyzed using bivariate and multivariate statistical methods. The relationships between soil and topography were strongly related to climatic characteristics (temperature and humidity) of different sites. Soils with the highest degree of fertility, deep and well drained, were located at the lowest elevations (< 150-200 m) and had gentle slopes (< 5 %). Pure forests of N. betuloides occurred in a wide topographic range with high soil variation. The different associations of N. betuloides, with the species N. pumilio, N. antárctica and Drimys winteri, occupy more specific site conditions. Nothofagus betuloides - N. pumilio occurred mostly in the most favorable sites with fertile soils. Nothofagus betuloides - N. antárctica occurred at higher elevations, and steeper slopes, characterized by very thin soils. Nothofagus betuloides - D. winteri occurred in coastal lowlands, with greater humidity and heavier rainfall, and deep soils with limited drainage
Rese a de "O espa o público na cidade contemporanea" de Angelo Serpa
Jenniffer Thiers Quintana
Revista de Geografía, Norte Grande , 2008,
Abstract:
LOCALIZA O GEODéSICA DA LINHA DE PREAMAR MéDIA COM RELA O AO ANO DE 1831, NA PRAIA DO FUTURO/ FORTALEZA-CE, BRASIL - DOI 10.5216/bgg.v32i1.18954
Paulo Roberto Lopes Thiers
Boletim Goiano de Geografia , 2012,
Abstract: O presente trabalho tem por fim apresentar resultados, descri o de metodologia para a representa o cartográfica, em escala cadastral, da localiza o geodésica da Linha de Preamar Média (LPM) e Linha de Terrenos de Marinha (LTM), com referência ao ano de 1831, em área da Praia do Futuro, localizada na cidade de Fortaleza, Estado do Ceará. Para a realiza o do estudo, foram utilizados métodos que envolvem conceitos de geodésia, cartografia e técnicas de sensoriamento remoto. Ao longo de toda a linha da costa brasileira há situa es que descrevem a ocupa o da faixa de terrenos de marinha: terrenos pertencentes à Uni o. Os resultados da determina o da LPM possibilitam o posicionamento da LTM, que é a distancia horizontal de 33m, contados a partir da LPM. O estudo representa, graficamente, a ocupa o da faixa de terrenos de marinha da Praia do Futuro, por edifica es/barracas. Este trabalho, parte da perícia encomendada pela Justi a Federal no Estado do Ceará, conclui que, efetivamente, apenas parte de estruturas das barracas da Praia do Futuro ocupa terrenos da Uni o.
Caracterización de suelos bajo bosques de Nothofagus betuloides (Mirb) Blume, en Tierra del Fuego, Chile
GERDING,VíCTOR; THIERS,OSCAR;
Revista chilena de historia natural , 2002, DOI: 10.4067/S0716-078X2002000400015
Abstract: soils under coigüe de magallanes (nothofagus betuloides (mirb) blume) forests, located in the oriental part of tierra del fuego (54o45'-54o15' s, 68o40'-70o10' w), were characterized morphologically, physically and chemically. associated tree species were lenga (nothofagus pumilio (p. et e.) krasser) and canelo (drimys winterii forst.). a total of 85 soil profiles and approximately 250 soil cores were described. the soils in the n. betuloides forests were young, heavily influenced by the volcanic activity, topography and climate. the presence of the orders spodosol and iceptisol was recorded. soils range from thin to very thin, with a high skeleton volume, loamy texture, structure ranging from massive to granular, with a low water retention capacity, and a moderate to slow drainage. they present high acidity (ph 4-4.5), low nutrient concentration and high levels of aluminum. the litter layer (oe/oa) presents adequate root development. there was generally a white horizon (frequently 10 yr 5/1-2) immediately below the litter, with a loamy texture, massive structure, and low rooting levels. the origin of this horizon is hypothesized to be related with pedogenic factors on volcanic ash deposits. it is concluded that the fertility of forest soils is low, mainly due to physical and chemical characteristics
Caracterización de suelos bajo bosques de Nothofagus betuloides (Mirb) Blume, en Tierra del Fuego, Chile Characterization of soils of Nothofagus betuloides (Mirb) Blume forests, in Tierra del Fuego, Chile
VíCTOR GERDING,OSCAR THIERS
Revista chilena de historia natural , 2002,
Abstract: En tres sectores de la parte occidental de Tierra del Fuego (54o45'-54o15' S, 68o40'-70o10' O) se caracterizó morfológica, física y químicamente los suelos bajo bosques de coigüe de Magallanes (Nothofagus betuloides (Mirb) Blume) y sus especies asociadas lenga (Nothofagus pumilio (P. et E.) Krasser) y canelo (Drimys winteri Forst.). Se describieron 85 perfiles de suelo y aproximadamente 250 observaciones con bastón pedológico. Los suelos bajo coigüe de Magallanes eran jóvenes, muy influidos por la actividad volcánica, topografía y clima. Se observó la presencia de los órdenes Spodosol e Iceptisol, principalmente. En general los suelos eran delgados a muy delgados (mayoritariamente entre 10 y 40 cm), con un alto volumen de esqueleto, textura franca, estructura masiva a granular, capacidad de agua aprovechable baja y drenaje externo e interno moderado a lento. Además, presentan una alta acidez (pH 4-5,5), una baja oferta nutricional y muy altos niveles de saturación de aluminio (promedio > 60 %). El mantillo (Oe/Oa) presentó condiciones adecuadas para el desarrollo radicular. Existe comúnmente un horizonte blanco (frecuentemente 10 YR 5/1-2) inmediatamente debajo del mantillo, con textura franco limosa y estructura masiva, con arraigamiento muy bajo. Se plantea como hipótesis que este horizonte se originó por depósitos de cenizas volcánicas y procesos de podzolización. Se concluye que la fertilidad de estos suelos es baja debido a limitantes físicas (dificultades de arraigamiento) y químicas (acidez, toxicidad de aluminio, baja oferta de bases) Soils under coigüe de Magallanes (Nothofagus betuloides (Mirb) Blume) forests, located in the oriental part of Tierra del Fuego (54o45'-54o15' S, 68o40'-70o10' W), were characterized morphologically, physically and chemically. Associated tree species were lenga (Nothofagus pumilio (P. et E.) Krasser) and canelo (Drimys winterii Forst.). A total of 85 soil profiles and approximately 250 soil cores were described. The soils in the N. betuloides forests were young, heavily influenced by the volcanic activity, topography and climate. The presence of the orders Spodosol and Iceptisol was recorded. Soils range from thin to very thin, with a high skeleton volume, loamy texture, structure ranging from massive to granular, with a low water retention capacity, and a moderate to slow drainage. They present high acidity (pH 4-4.5), low nutrient concentration and high levels of aluminum. The litter layer (Oe/Oa) presents adequate root development. There was generally a white horizon (frequently 10 YR 5/1-2) immediately below th
Exportación de nitrógeno y calcio mediante raleo en un rodal de Eucalyptus nitens de 5 a?os de edad, Chile
Thiers E,Oscar; Gerdinga,Victor; Schlatter,Juan E;
Bosque (Valdivia) , 2007, DOI: 10.4067/S0717-92002007000300011
Abstract: the aim of the present paper was to assess the export of nitrogen and calcium in a five-year-old stand of eucalyptus nitens (41°01's y 73°27' w; 200 m rise, acrudoxic hydric hapludand red clay soil), with and without fertilization, due to the thinning with varying extents of biomass extraction (logs: only wood, trunks: wood plus bark, and whole tree). the plantation was established in 1996 and was fertilized (f) with phosphoric rock before planting, in the spring of the same year (npk + microelements), the next year (npk) and the third year (np). a similar surface (0.25 ha) was defined as the control plot (t). the thinning of 700 trees ha-1 was considered, leaving a residual density of 800 trees ha-1 with the pruning of the lowest third of the crown. prior to the thinning, the above-ground biomass in t was 95.6 mg ha-1 (accumulation of: 434 kg n ha-1 and 306 kg ca ha-1) and in f it was 121.3 mg ha-1 (516 kg n ha-1 and 359 kg ca ha-1). roots represented 6.2% and 5.4% of the total biomass, respectively. the extraction of logs (only wood) exported 16-18% of the above-ground nitrogen and 5-6% of the above-ground calcium in the stand, whereas the extraction of whole trees took out 41-44% of the nitrogen and calcium. the bark was the biomass component that accumulated the most calcium, reaching almost three times as much as that in the wood. retention of the bark in the site can be significant for the supply of this element during rotation
Propagación vegetativa de taique (Desfontainia spinosá) y tepa (Laureliopsis philippianá) con fines ornamentales
Delgado,Mabel F; Cuba,Marely; Hechenleitner,Paulina; Thiers,Osear;
Bosque (Valdivia) , 2008, DOI: 10.4067/S0717-92002008000200004
Abstract: taique (desfontainia spinosa) and tepa (laureliopsis philippiana) are both highly ornamental native species from chile. in order to investigate the capacity of vegetative propagation of these species, different concentrations of indolbuturic acid (iba) with different types of cuttings were tested. the study was carried out inside a greenhouse with intermittent misting system. cuttings were placed on a hot propagation bed at a temperature of 22 ± 2o c. a mixture of sphagnum and perlite (1:1) was used as propagation substrate. iba concentrations of 0-1,000-2,500 and 4,000 ppm were tested for apical and subapical cuttings of taique. concentrations of 0, 1,000, 2,000, 3,000, and 4,000 ppm were tested for apical cuttings of tepa. main results indicated that taique can be propagated easily by cuttings collected during winter time using iba at concentrations between 1,000-4,000 ppm (67-82% of rooting succeeded), no matter the type of cutting used. tepa showed a greater difficulty in rooting capacity than taique when propagated by cuttings. results showed values of propagation percentage from 6.7% for cuttings without hormone, up to 33% for cuttings with a concentration of 4,000 ppm of aib.
GEOTECNOLOGIAS APLICADAS à REESTRUTURA O FUNDIáRIA
Paulo Roberto Lopes Thiers,Ant?nio Jeovah Andrade de Meireles
Boletim Goiano de Geografia , 2008,
Abstract: A resolu o das quest es fundiária e agrária do país passa, necessariamente, pela forma de destina o de terras e por modelo consolidado por políticas públicas que garantam as condi es para o uso da terra: registro do imóvel, implanta o de infra-estrutura econ mica e assistência técnica, saúde e educa o para o desenvolvimento social e ambiental viáveis e sustentáveis. As geotecnologias s o ferramentas que permitem coletar dados e produzir as informa es para a gest o territorial com vistas na reestrutura o fundiária.
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