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| Magalhães, Washington Luiz Esteves; Pereira, José Carlos Duarte; Muñiz, Graciela Ines Bolzon; Klock, Umberto; Silva, José Reinaldo Moreira da. |
| Foi estudado o uso da espectroscopia de infravermelho próximo (NIR) em conjunto com a regressão por mínimos quadrados parciais (PLS) na determinação de propriedades químicas e anatômicas da madeira. As amostras de madeira de sete espécies de eucaliptos e uma de pinus foram analisadas quanto aos teores de lignina e extrativos totais, comprimento e largura de fibra, espessura de parede e poder calorífico superior. Os espectros de NIR foram obtidos a partir de amostras e serragem de madeira. A calibração dos espectros mostrou-se eficiente para uso na predição das propriedades teor de lignina e espessura de parede, com os coeficientes de correlação acima de 0,9 e 0,8, respectivamente. Obteve-se uma única curva de calibração do teor de lignina para todas... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Infravermelho próximo; Pinus; Eucaliptos; Propriedades químicas; Propriedades anatômicas Near infrared; Pine; Eucalyptus; Chemical properties; Anatomical properties. |
| Ano: 2011 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/238 |
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| Soriano Espinosa, Graciela Belem. |
| El objetivo del presente estudio fue determinar el efecto de fertilización con N, P y K, en el crecimiento y la calidad de planta de Pinus patula y Pinus devoniana. Las plantas fueron cultivadas por un periodo de ocho meses, en contenedores de 120 cm3, usando como sustrato una mezcla de perlita, vermiculita y musgo turba en proporción 20:20:60. El experimento consistió en un diseño factorial 33 completamente al azar con tres repeticiones. Los factores probados fueron N, P y K cada uno de ellos con tres niveles. Los niveles de N fueron 0, 100 y 200 ppm; los de P, 0, 60 y 125 ppm, los de K 0,75 y 150 ppm. Las variables morfológicas evaluadas fueron; altura, diámetro, peso seco del follaje, peso seco de tallo y peso seco de raíz. Los índices de calidad de... |
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Palavras-chave: Fertilización química; Vivero forestal; Pino; Indice de calidad de Dickson; Variables morfológicas; Chemical fertilization; Forest nursery; Pine; Dickson quality index; Morphologic variables; Maestría; Forestal. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/394 |
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| Soriano Espinosa, Graciela Belem. |
| El objetivo del presente estudio fue determinar el efecto de fertilización con N, P y K, en el crecimiento y la calidad de planta de Pinus patula y Pinus devoniana. Las plantas fueron cultivadas por un periodo de ocho meses, en contenedores de 120 cm3, usando como sustrato una mezcla de perlita, vermiculita y musgo turba en proporción 20:20:60. El experimento consistió en un diseño factorial 33 completamente al azar con tres repeticiones. Los factores probados fueron N, P y K cada uno de ellos con tres niveles. Los niveles de N fueron 0, 100 y 200 ppm; los de P, 0, 60 y 125 ppm, los de K 0,75 y 150 ppm. Las variables morfológicas evaluadas fueron; altura, diámetro, peso seco del follaje, peso seco de tallo y peso seco de raíz. Los índices de calidad de... |
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Palavras-chave: Fertilización química; Vivero forestal; Pino; Indice de calidad de Dickson; Variables morfológicas; Chemical fertilization; Forest nursery; Pine; Dickson quality index; Morphologic variables; Maestría; Forestal. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/394 |
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| Kogan,Marcelo; Alister,Claudio. |
| Under Chilean conditions the lack of weed control at forest tree establishment results in an average of at least 60% less biomass accumulation during the first year of growth of radiate pine or eucaliptus, and glyphosate offers a series of advantages in forestry weed management because its activity in both herbaceous weed groups, monocots and dicots, as well as annuals, biennials and perennials. Also, its efficacy in woody undesirable vegetation makes glyphosate a very important herbicide that can be applied to control herbaceous and woody weeds as pre-planting and during the second or third years of trees growth as strip applications. The aim of this review is to discuss the main uses of glyphosate in reforestation worldwide, during the first 2 yr after... |
| Tipo: Journal article |
Palavras-chave: Pine; Eucalyptus; Rainfastness; Woody plants. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000400017 |
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| Braga,Fernanda G.; Santos,Raphael E. F.; Batista,Antonio C.. |
| This research presents novel data on tree marking by the giant anteater, a large Neotropical mammal threatened in the state of Paraná and other areas of Brazil, and nearly threatened worldwide. Field work was carried out in the municipality of Jaguariaíva, Paraná (Southern Brazil) with the goal of evaluating the pine marking behavior of the giant anteater and ascertaining whether wildfires interfere with it. Anteater marks were searched for on the trunks of pine trees in stands as well as pine trees dispersed throughout the landscape. For each pine tree, the following features were recorded: height, diameter breast height (DBH), height of first branch, presence/absence of scratch marks, geographical location, substrate, and matrix. The total number of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Behavior; Paraná; Pilosa; Pine; Scratches. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000100002 |
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| Popp, Michael P.; Nalley, Lawton Lanier. |
| Arkansas cropping pattern changes at the county level were estimated under various scenarios involving a likely decline in water availability, the development of a biomass market for renewable energy production, and the potential of a widely used carbon offset market. These scenarios are analyzed separately and jointly to determine which of the three scenarios is expected to have the largest impact on net (emissions – sequestration) greenhouse gas (GHG) emissions, renewable fuels feedstock supply, and producer net returns. Land use choices included conventional crops of rice, cotton, soybean, corn, grain sorghum, pasture, and hay. Specialty crops of loblolly pine and switchgrass were modeled for their respective potential to sequester carbon and provide... |
| Tipo: Journal Article |
Palavras-chave: Carbon offsets; Irrigation restriction; Pine; Switchgrass; Farm Management; Resource /Energy Economics and Policy; Q11; Q15; Q16; Q18; Q54. |
| Ano: 2011 |
URL: http://purl.umn.edu/113533 |
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