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| Registros recuperados: 53 | |
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| Calixto, Juliana Sena; Ribeiro, Eduardo Magalhaes. |
| This work aims to analize the impacts of the large scale eucalyptus plantation introduction into the areas of Alto Jequitinhonha in the decade of 1970, starting from the several local actors’ depositions, articulated with available literature on the theme. The work is structured in an introduction, a brief on the theoretical composition of the area occupation process for reforestation in the wide climbs, in the methodological procedures and in the presentation and analysis of the social actors’ positioning of the eucalyptus monoculture in Alto Jequitinhonha, considered primordial to understand the impacts of the tax incentives policies, their current reflexes in the regional economy and to visualize proposals of public policies for the development of the... |
| Tipo: Journal Article |
Palavras-chave: Reforestation; Qualitative research; Alto Jequitinhonha. |
| Ano: 2007 |
URL: http://purl.umn.edu/43705 |
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| Calixto, Juliana Sena; Ribeiro, Eduardo Magalhaes; Galizoni, Flavia Maria; Macedo, Renato Luis Grisi. |
| Beginning in the 1970’s the plateaus of Alto Jequitinhonha, northeast of Minas Gerais, until then areas of common use by family farmers, were planted with eucalyptus. This article analyzes the effects of reforestation on land occupation, comparing it with the areas of the family production. It is carried out in the homogenous micro-region of Capelinha, an area with the largest concentration of eucalyptus in the region. Secondary data from the IBGE Census for the years 1970, 1980, 1985 and 1996 were used, and also secondary data from surveys conducted around the region studied, including interviews with management of companies and union leadership. The article concludes that, in thirty years, the reforestation concentrated the land and created reduced... |
| Tipo: Journal Article |
Palavras-chave: Family agriculture; Reforestation; Rural development; Rural employment; Jequitinhonha; Agribusiness; J21; 013; Q18. |
| Ano: 2010 |
URL: http://purl.umn.edu/60811 |
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| Zomer, Robert J.; Bossio, Deborah A.; Trabucco, Antonio; Yuanjie, Li; Gupta, Diwan C.; Singh, Virendra P.. |
| Trees are increasingly grown on-farm to supply wood and biomass needs within developing countries. Over the last several decades, within the irrigated rice-wheat growing lands of northern India, fast-growing poplar trees have been planted on tens of thousands of small farms. Recent debate regarding afforestation has raised the issue that water use is often increased when trees are planted. This ongoing debate focuses primarily on afforestation or reforestation of upland and rain-fed agricultural areas, and off-site impacts such as reduced streamflow. Adoption of poplar agroforestry in northern India, in contrast, is occurring in areas where land and water are already intensively used and managed for agricultural production. This study based on farmer... |
| Tipo: Report |
Palavras-chave: Trees; Populus deltoids; Agroforestry; Afforestation; Reforestation; Models; Water use; Water balance; Evapotranspiration; Precipitation; Remote sensing; Irrigation requirements; India; Agricultural and Food Policy; Agricultural Finance; Community/Rural/Urban Development; Crop Production/Industries; Environmental Economics and Policy; Productivity Analysis; Research and Development/Tech Change/Emerging Technologies; Research Methods/ Statistical Methods; Resource /Energy Economics and Policy. |
| Ano: 2007 |
URL: http://purl.umn.edu/53067 |
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| Saez, Maria Del Carmen Almansa; Calatrava-Requena, Javier. |
| The methodology used for Economic Valuation of the Externalities generated by the Watershead Restoration and Erosion Control Projects in the Hydrographic Basins of the Mediterranean Slope, is based on the Replacement Cost Method. Environmental Economics, however, today offer us other methodological possibilities, whose application to the valuation of this type of project may prove to be of interest. It is the case of the Contingent Valuation Method used for the evaluation of the effects of the Watershead Restoration and Erosion Control Projects of the Aljibe Basin (Almería) Spain, presented here. The results obtained show that, in this case study, application of Contingent Valuation ascribes greater social profitability of the project, with 5.23 % of IRR... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Contingent valuation; Replacement cost; Cost-benefit analysis; Restoration of basins; Desertification; Reforestation; Resource /Energy Economics and Policy. |
| Ano: 2002 |
URL: http://purl.umn.edu/24847 |
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| Lima,Augusto Miguel Nascimento; Silva,Ivo Ribeiro da; Stape,Jose Luis; Mendonça,Eduardo Sá; Novais,Roberto Ferreira; Barros,Nairam Félix de; Neves,Júlio César Lima; Paul,Keryn; Schulthais,Fernanda; Polglase,Phill; Raison,John; Soares,Emanuelle Mercês Barros. |
| Soil organic matter (SOM) plays an important role in carbon (C) cycle and soil quality. Considering the complexity of factors that control SOM cycling and the long time it usually takes to observe changes in SOM stocks, modeling constitutes a very important tool to understand SOM cycling in forest soils. The following hypotheses were tested: (i) soil organic carbon (SOC) stocks would be higher after several rotations of eucalyptus than in low-productivity pastures; (ii) SOC values simulated by the Century model would describe the data better than the mean of observations. So, the aims of the current study were: (i) to evaluate the SOM dynamics using the Century model to simulate the changes of C stocks for two eucalyptus chronosequences in the Rio Doce... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil organic matter; Land use change; Reforestation. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000300018 |
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| Silva,Rodrigo F. da; Ros,Clovis O. Da; Scheid,Douglas L.; Grolli,André L.; Marco,Rudinei De; Missio,Evandro L.. |
| ABSTRACTHigh concentrations of copper (Cu) may be toxic to plants, yet some species can be tolerant to soils contaminated by this metal. The study aimed to evaluate Cu translocation and tolerance in seedlings of ‘timbaúva’ (Enterolobium contortisiliquum (Vell.) Morong), ‘pata-de-vaca’ (Bauhinia forficata Link) and ‘amendoim-bravo’ (Pterogyne nitensTul) subjected to Cu-contaminated soil. The study was conducted in a greenhouse for 120 days, using as substrate a clayey Oxisol. The experiment was set in a completely randomized design, using a 3 x 6 factorial scheme, corresponding to three forest species (‘timbaúva’, ‘pata-de-vaca’ and ‘amendoim-bravo’) and six Cu doses in the soil (0, 60, 120, 180, 240 and 300 mg kg-1), with six replicates. The following... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Heavy metal; Phytoremediation; Reforestation; Soil cover. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015001101093 |
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| Pinto,José R. de S.; Freitas,Rômulo M. O. de; Leite,Tiago de S.; Oliveira,Francisco de A. de; Ferreira,Hugo; Leite,Moadir de S.. |
| ABSTRACT This study aimed to evaluate the growth of young Tabebuia aurea seedlings irrigated with different concentrations of wastewater from fish farming. The experiment was conducted in a seedling nursery, from June to August 2013. The treatments consisted of five concentrations of wastewater from fish farming diluted in freshwater (0, 25, 50, 75 and 100% of wastewater). Plant height, stem diameter and plant height/stem diameter ratio were evaluated every 15 days to verify the effects of treatments on seedlings growth. At the end of the experiment, individual leaf area, leaf area, leaf dry matter, stem dry matter, root dry matter, total dry matter and Dickson quality index were also evaluated. The reuse of wastewater from fish farming diluted at... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water reuse; Seedling production; Salinization; Reforestation. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000600519 |
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| Moreira,Milene; Baretta,Dilmar; Tsai,Siu Mui; Cardoso,Elke Jurandy Bran Nogueira. |
| Araucaria angustifolia (Bert.) O. Ktze., a native forest tree from Brazil, is under extinction risk. This tree depends on arbuscular mycorrhizal fungi for growth and development, especially in tropical low-P soils but, despite being a conifer, Araucaria does not form ectomycorrhiza, but only the arbuscular endomycorrhiza. This study aimed at surveying data on the spore density and root colonization (CR) by arbuscular mycorrhizal fungi (AMF) in Araucaria angustifolia forest ecosystems, in order to discriminate natural, implemented, and anthropic action-impacted ecosystems, by means of Canonical Discriminant Analysis (CDA). Three ecosystems representative of the Campos do Jordão (SP, Brazil) region were selected: 1. a native forest (FN); 2. a replanted... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazil pine; Biodiversity; Species richness; Reforestation. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000400009 |
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| MARENCO,Ricardo A.; VIEIRA,Gil; GONÇALVES,José F. de C.. |
| In the Brazilian Amazon, large areas of abandoned lands may revert to secondary forest. In the process, pioneer tree species have an important role to restore productivity in old fields and improve environmental conditions. To determine potential photosynthesis (Apot), stomatal conductance (g), transpiration (E), and leaf micronutrient concentrations in Ochroma pyramidale (Cav. ex Lam.) Urban a study was carried out in the Brazilian Amazon (01o 51' S; 60o 04' W). Photosynthetic parameters were measured at increasing [CO2], saturating light intensity (1 mmol (photons) m-2 s-1), and ambient temperature. The rate of electron-transport (J), Apot,and water-use efficiency (WUE) increased consistently at increasing internal CO2 concentration (Ci). Conversely,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Balsa wood; Electron-transport rate; Reforestation; Stomatal conductance; Transpiration; Water-use efficiency. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672003000100023 |
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| Batista, Araína Hulmann; Motta, Antônio Carlos Vargas; Reissmann, Carlos Bruno; Schneider, Thays; Martins, Iara Lang; Hashimoto, Maurício. |
| Soils with high acidity and low exchangeable bases may be responsible for low yields of Pinus taeda in a forest plantation at Jaguariaíva, Paraná State, Brazil. The aim of this study was to evaluate the effect of liming and fertilisation, applied over litter, on two selected areas with Pinus taeda plantations. Soil, litter and pine needles were evaluated for K, Ca and Mg concentrations and soil acidity parameters. Seven treatments were applied: (i) complete (N, P, K, Zn, Cu, B, Mo, and lime); (ii) without N, P, and K; (iii) without Zn, Cu, B, and Mo; (iv) without K; (v) without Zn; (vi) without lime; and (vii) control (without nutrients and lime). Soil samples were collected at five soil depths (0-5, 5-10, 10-20, 20-40 and 40-60 cm) simultaneously with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ciência do Solo nutrient deficiency; Reforestation; Litter; Soil reaction; Acidification Nutrição Mineral de Plantas. |
| Ano: 2014 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/18061 |
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| Registros recuperados: 53 | |
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