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| Registros recuperados: 14 | |
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| Pérez Sandoval, Reyna. |
| Este trabajo se realizó en plantaciones establecidas por la empresa Forestaciones Operativas Mexicanas (FOMEX), en el Municipio de Huimanguillo, Tabasco, con la finalidad de encontrar relaciones entre variables del suelo superficial (0-20 y 20-40cm) y el crecimiento de plantaciones de Eucalyptus urophylla y E. grandis. Como índice de crecimiento se utilizó índice de sitio (IS) y las variables edáficas estudiadas fueron: pH, materia orgánica, fósforo extractable, los cationes intercambiables: K, Ca y Mg. También se consideró la capacidad de intercambio catiónico, porcentaje de saturación de bases, porcentaje de saturación de aluminio, densidad aparente, nitrógeno total, capacidad de retención de humedad a capacidad de campo y textura. Se colectaron... |
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Palavras-chave: Plantaciones forestales; Suelo; Productividad; Eucalyptus; Indice de sitio; Forest plantations; Forest soils; Soil productivity; Eucalyptus; Site index; Maestría; Forestal. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/190 |
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| Pérez Sandoval, Reyna. |
| Este trabajo se realizó en plantaciones establecidas por la empresa Forestaciones Operativas Mexicanas (FOMEX), en el Municipio de Huimanguillo, Tabasco, con la finalidad de encontrar relaciones entre variables del suelo superficial (0-20 y 20-40cm) y el crecimiento de plantaciones de Eucalyptus urophylla y E. grandis. Como índice de crecimiento se utilizó índice de sitio (IS) y las variables edáficas estudiadas fueron: pH, materia orgánica, fósforo extractable, los cationes intercambiables: K, Ca y Mg. También se consideró la capacidad de intercambio catiónico, porcentaje de saturación de bases, porcentaje de saturación de aluminio, densidad aparente, nitrógeno total, capacidad de retención de humedad a capacidad de campo y textura. Se colectaron... |
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Palavras-chave: Plantaciones forestales; Suelo; Productividad; Eucalyptus; Indice de sitio; Forest plantations; Forest soils; Soil productivity; Eucalyptus; Site index; Maestría; Forestal. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/190 |
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| Reis Filho, Wilson; Santos, Franciele dos; Strapasson, Priscila; Nickele, Mariane Aparecida. |
| A desfolha artificial permite mensurar a intensidade do dano devido à desfolha causada por insetos. No presente estudo, buscou-se avaliar os danos causados por formigas cortadeiras em plantios de Pinus taeda e Eucalyptus grandis com 30 dias de idade. Foi estabelecida uma classificação baseada em níveis de desfolha semelhantes aos causados por formigas cortadeiras. Para P. taeda, os níveis foram: N1: 50%, N2: 75%, N3: 100% e N4: 100% de desfolha, incluindo o corte do meristema apical. Para E. grandis, os níveis foram N1: 50%, N2: 75% e N3: 100% de desfolha, incluindo o corte do meristema apical. Após um ano, as mudas de P. taeda tiveram perdas em altura e diâmetro nos níveis de N2 a N4. Mudas de P. taeda desfolhadas no nível N4 apresentaram perdas de 37,0%... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Níveis de dano; Plantios florestais; Pragas florestais. Damage levels; Forest plantations; Forest pests.. |
| Ano: 2011 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/175 |
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| Machado, Murilo Rezende; Camara, Rodrigo; Sampaio, Paulo de Tarso Barbosa; Pereira, Marcos Gervasio; Ferraz, João Baptista Silva. |
| Forest plantations may minimize the effects of deforestation in the Amazon. However, there are differences among species in terms of their influences on soil recovery. The effects of monospecific plantations of Acacia mangium, Dipteryx odorata, Jacaranda copaia, Parkia decussata,and Swietenia macrophylla, and areas of pasture and native forest on the chemical soil attributes of the Brazilian Amazon were evaluated. One bulked soil sample was collected per plot (0.00-0.05, 0.05-0.10, and 0.10-0.30 m; three plots of 128 m2) in each area. No significant differences in most of the soil attributes were observed among the forest plantations. However, soil K+ and P were higher in the Swietenia macrophylla plantations, while higher values of Ca2+, sum of bases, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ciências Agrárias Amazon deforestation; Edaphic attributes; Environmental reclamation; Forest plantations; Manejo e Conservação do Solo. |
| Ano: 2017 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/32689 |
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| Romo Guzmán, Domingo. |
| En la investigación se analizó el proceso social que contempló como objetivo la creación de una organización territorial para la reconversión forestal, mediante el cambio de uso del suelo agrícola y pecuario, hacia el establecimiento y manejo de plantaciones forestales, prioritariamente de Pino patula. A partir del año 2000 se llevó a cabo dicha transformación del patrón de uso del suelo, en el municipio de Zacualpan, estado de Veracruz, México. El supuesto hipotético considera que las dinámicas participativas autogestionarias, sustentadas en objetivos de desarrollo de capacidades agroeconómicas y de amplificación de la biodiversidad de sistemas de manejo de recursos naturales con fines económicos y sociales; de manera general y estratégica contribuyen... |
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Palavras-chave: Organización; Plantaciones forestales; Apropiación territorial; Organization; Forest plantations; Territorial appropriation; Maestría; Desarrollo Rural. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/292 |
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| Miranda, Dirceu Lucio Carneiro; Francio, Jonas; Santos, Juliano de Paula; Sanquetta, Carlos Roberto; Corte, Ana Paula Dalla. |
| This study aimed to compare three sampling methods: fixed area, Bitterlich, and Prodan, regarding accuracy and relative efficiency to estimate the variables: diameter at 1.30 m above soil level (DBH), number of trees, basal area, and volume. The limit of error established was 10% at probability level of 95%, using 30 plots for each method. Circumference at 1.30 m above soil level was measured, for conversion in DBH, with total time counted since the plots installation until the last tree measured. The most accurate sampling was the fixed area method, for estimation of DBH and number of trees per hectare, whereas the Bitterlich method was the most accurate for estimation of basal area and volume. Bitterlich method proved to be more efficient for estimation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Forest inventory; Forest plantations; Tectona grandis Recursos Florestais; Engenharia Florestal; Inventário Florestal Inventário floresta; L Plantios florestais; Tectona grandis. |
| Ano: 2015 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/638 |
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| Delgado-Caballero,Carina E.; Gómez-Guerrero,Armando; Valdez-Lazalde,José R.; De los Santos-Posadas,Hector; Fierros-González,Aurelio M.; Horwath,William R.. |
| Research on the ability of tropical soils to support fast-growing forests species is required to optimize, preserve and select lands for timber production. In this work site index (SI) of Eucalyptus grandis and E. urophylla plantations in Southeastern Mexico, was related to chemical and physical soil properties. Based on a joint model of SI vs. sand content, the fit suggests that SI improves as the sand content increases (p<0.01). Sand content of 28% in the surface soil (0-5 cm) and 24% in the sub-surface soil (5-30 cm) is a desired minimum for establishing highly productive stands. The best SI conditions were found on sandy soils with a sand content of 65 %. Other variables, such as soil bulk density, N mineralization and organic matter were also... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Forest plantations; Forest soils; Site productivity; Soil physical properties. |
| Ano: 2009 |
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952009000100007 |
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| Garlet, Juliana; Costa, Ervandil Corrêa; Boscardin, Jardel; Machado, Dayanna Nascimento; Pedron, Leandra; Machado, Leonardo Mortari. |
| The aim of this study was to investigate the effect of different chemical control of alternative weed in soil fauna in initial planting of Eucalyptus grandis. The treatments consisted of partial and full control of the weed vegetation. Collections were conducted through soil trap (pitfall). We collected 26,136 specimens, distributed in 13 taxonomic groups (Araneae, Blattodea, Chilopoda, Collembola, Coleoptera, Diplopoda, Diptera, Hemiptera, Hymenoptera, Termitoidea, Orthoptera, Opilione and young forms). The treatments with remaining weed vegetation presented higher values of evaluated indices. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chemical control; Forest plantations; Edaphic arthropods Recursos Florestais Engenharia Florestal Silvicultura Proteção Florestal Controle químico; Plantação florestal; Artrópodos edáficos. |
| Ano: 2017 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/970 |
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| Aide, T. Mitchell; University of Puerto Rico; tmaide@yahoo.com. |
| For many years, tropical and subtropical forests have been deforested for agriculture, grazing, and timber extraction. Nevertheless in the last decade, several publications have suggested that some regions of Latin America are showing a process of forest transition. Forest transition theory predicts that industrialization and urbanization will lead to the abandonment of marginal agriculture lands and the recovery of natural systems such as forests. However, there are many ecological, economic, and social factors that could act as barriers to ecosystem recovery. To evaluate this hypothesis, we analyzed the socioeconomic and land-use changes during the last 30 years at the provincial and departmental level in the province of Misiones, Argentina. We... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Atlantic Forest; Forest plantations; Forest transition; Rural– Urban migration. |
| Ano: 2008 |
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| Registros recuperados: 14 | |
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