Consulta: subjectFacets:"Degraded areas"
Registros recuperados: 9
Data/hora: 09/06/2024 15:36:23

Desenvolvimento inicial e nutrição do pau-pombo em resposta à fertilização com nitrogênio e fósforo.
Provedor de dados: 14
Autores: DUBOC, E.; GUERRINI, I. A.
bitstream/CPAC-2010/27820/1/bolpd-163.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Espécie florestal; Área degradada; Recuperação; Forest; Species; Riparian vegetation; Degraded areas; Recovering; Código Florestal.; Cerrado; Mata Ciliar.
Ano: 2006
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/570276

Initial Recovery of Organic Matter of a Grass-Covered Constructed Soil after Coal Mining
Provedor de dados: 90
Autores: Leal,Otávio dos Anjos; Castilhos,Rosa Maria Vargas; Pinto,Luiz Fernando Spinelli; Pauletto,Eloy Antonio; Lemes,Elisa Souza; Kunde,Roberta Jeske.
ABSTRACT Revegetation is essential to improve the quality of constructed soils. This study investigated effects of perennial grasses on total organic carbon (TOC) stock, organic matter (OM) fractions and on quality of a recently constructed soil, after coal mining. Soil samples were collected from the 0.00-0.03 m layer two years after the beginning of the experiment. The treatments consisted of Cynodon dactylon cv vaquero (T1); Urochloa brizantha (T2); Panicum maximun (T3); Urochloa humidicola (T4); Hemarthria altissima (T5); Cynodon dactylon cv tifton (T6); bare constructed soil (T8); and natural soil (T9). The treatments with grass species increased the TOC stock by 57 % and increased the OM lability in comparison with T8. Higher C accumulation in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Degraded areas; Physical fractionation; Carbon management index; Laser-induced fluorescence.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100529

Microbial and soil properties in restoration areas in the jequitinhonha valley, Minas Gerais
Provedor de dados: 90
Autores: Santos,Danielle Cristina Fonseca; Grazziotti,Paulo Henrique; Silva,Alexandre Christófaro; Trindade,Aldo Vilar; Silva,Enilson de Barros; Costa,Lidiomar Soares da; Costa,Hesmael Antônio Orlandi.
To mitigate the impacts of eucalypt monoculture, forestry companies in the Upper Jequitinhonha Valley (MG) have adopted the insertion of strips of native vegetation in-between the commercial plantations. The method used for the creation of these corridors is to allow spontaneous regrowth of native vegetation in areas previously under eucalypt. The objective of this study was to evaluate the effect of cover crops on microbial and soil properties for a detailed description of the restoration process of native vegetation in forest soils of the Jequitinhonha Valley. The treatments were represented by an initial restoration stage (&lt; 4 years) with or without remaining eucalypt and the advanced restoration stage (&amp;gt; 4 years) with or without remaining...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Spontaneous regrowth; Soil quality; Degraded areas; Microbial biomass; Microbial activity.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000600035

Nucleation in tropical ecological restoration
Provedor de dados: 63
Autores: Reis,Ademir; Bechara,Fernando Campanhã; Tres,Deisy Regina.
Ecological theories of facilitation and nucleation are proposed as a basis for environmental restoration in tropical ecosystems. The main goal of this paper is to present restoration techniques based on the concept of nucleation, in which small nuclei of vegetation are established within a degraded land. The nucleation techniques (artificial shelters for animals, planting of herbaceous shrub life forms, soil and seed bank translocation, seed rain translocation, soil and seed rain translocation's seedling set, artificial perches, planting of native trees in groups, and ecological stepping-stones with functional groups) promote the landscape connectivity on two flows: inward: receiver connectivity and outward: donor connectivity. The nuclei development...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Facilitation; Succession; Heterogeneity; Landscape connectivity; Degraded areas.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000200018

The effect of exotic grass Urochloa decumbens (Stapf) R.D.Webster (Poaceae) in the reduction of species richness and change of floristic composition of natural regeneration in the Floresta Nacional de Carajás, Brazil
Provedor de dados: 42
Autores: FERREIRA,LEANDRO V.; PAROLIN,PIA; MATOS,DARLEY C.L.; CUNHA,DENISE A.; CHAVES,PRISCILLA P.; NECKEL,SELVINO O.
ABSTRACT The introduction of exotic species is considered as one of the major causes of biodiversity loss. The National Forest of Carajás is one of the largest mineral provinces in the world. Mining activities caused changes of the natural habitats, leaving degraded areas after the mineral exploitation. One of the mining areas within FLONA Carajás was used for the extraction of gold. In the process of exploitation, a huge depression was formed by the removal of soil which was mounded up nearby. To prevent soil erosion of these mounds, an exotic grass, Urochloa decumbens (Stapf) R.D.Webster (Poaceae) was planted. The objective of this study was to compare the impact of this non-native grass on species richness and species composition of the natural...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Exotic species; Degraded areas; Floristic; Mining.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000200589

Revegetación de áreas degradadas con especies nativas
Provedor de dados: 51
Autores: Dalmasso,Antonio Daniel.
El área de trabajo se localiza al sur de Malargue-Mendoza; es un clima árido, con una precipitación media anual de 134 mm y una temperatra media anual de 13,3°C. Se evalúan los resultados de la revegetación con especies nativas en áreas degradadas por la actividad petrolera propendiendo que los ecosistemas alterados alcancen una mayor estabilidad, en lo posible similar a la situación previa al impacto. Se realizó un inventario geomorfológico y de vegetación estableciéndose hipótesis dinámicas de vegetación. A través del enfoque geosinfitosociológico, y en función de la dinámica vegetal, se seleccionaron un total de 10 especies que fueron reproducidas en vivero y establecidas en tres plataformas petroleras del área, tanto en otoño como en primavera. El...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Revegetación; Recuperación; Áreas degradadas; Especies nativas; Revegetation; Recovery; Degraded areas; Native species.
Ano: 2010
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722010000100011

Tripartite symbiosis of Sophora tomentosa, rhizobia and arbuscular mycorhizal fungi
Provedor de dados: 58
Autores: Toma,Maíra Akemi; Carvalho,Teotonio Soares de; Guimarães,Amanda Azarias; Costa,Elaine Martins da; Silva,Jacqueline Savana da; Moreira,Fatima Maria de Souza.
ABSTRACT Sophora tomentosa is a pantropical legume species with potential for recovery of areas degraded by salinization, and for stabilization of sand dunes. However, few studies on this species have been carried out, and none regarding its symbiotic relationship with beneficial soil microorganisms. Therefore, this study aimed to evaluate the diversity of nitrogen-fixing bacteria isolated from nodules of Sophora tomentosa, and to analyze the occurrence of colonization of arbuscular mycorrhizal fungi on the roots of this legume in seafront soil. Thus, seeds, root nodules, and soil from the rhizosphere of Sophora tomentosa were collected. From the soil samples, trap cultures with this species were established to extract spores and to evaluate arbuscular...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Legumes; Diversity of rhizobia; Degraded areas.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822017000400680

Eucalyptus grandis Hill ex Maiden inoculated with Pisolithus microcarpus (UFSC-Pt116) in land subject to the sandy process in southern Brazil
Provedor de dados: 58
Autores: Souza,Eduardo Lorensi de; Antoniolli,Zaida Inês; Machado,Rafael Goulart; Eckhardt,Daniel Pazzini; Dahmer,Sabrina de Fátima Barbosa.
Eucalypts is one of the main species used for commercial reforestation in the state of Rio Grande do Sul, Brazil. This study aimed to evaluate the survival and early growth of eucalyptus trees in an area subject to sandy process after three years of growth. The Eucalyptus grandis seedlings were grown in a greenhouse, innoculated or not with the isolated ectomycorrhizal Pisolithus microcarpus (UFSC-Pt116), produced in peat or Entisol. After 120 days, the seedlings were transplanted to an area subject to the sandy process, in the city of São Francisco de Assis, RS. The plants have been evaluated regarding survival, height, stem diameter, nitrogen, phosphorus and potassium levels and total phosphorus, inorganic phosphorus, organic phosphorus and wood...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ectomycorrhiza; Degraded areas; Entisol; Inoculation.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000400004

Utilization of the chlorophyll a fluorescence technique as a tool for selecting tolerant species to environments of high irradiance
Provedor de dados: 61
Autores: Gonçalves,José Francisco de Carvalho; Santos Júnior,Ulysses Moreira dos.
We examine the hypothesis that the chlorophyll a fluorescence technique can be an efficient tool to support the selection of species adapted to high irradiance and therefore, suitable for use in initial rehabilitation projects of degraded areas. The experiment was conducted at the Pedro de Moura Operational Base, Amazonas, Brazil. The fluorescence transients were obtained using a portable fluorometer for leaves of Bombacopsis macrocalyx (Bm), Eugenia cumini (Ec), Iryanthera macrophyla (Im) and Senna reticulata (Sr), which were subjected to high irradiance between 12:00 am and 1:00 p.m. Using the OJIP test, the following were calculated: performance index (PI ABS), density of reaction centres per cross section (RC/CS), maximum efficiency of photosystem II...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Degraded areas; Energy flux; Performance index.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202005000300005