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| Registros recuperados: 22 | |
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| Andrade,Eunice Maia de; Rodrigues,Rafael do Nascimento; Palácio,Helba Araújo de Queiroz; Brasil,José Bandeira; Guerreiro,Maria João Simas. |
| ABSTRACT The greater probability of small rainfall events occurring in semi-arid regions, and the little understanding of their role in hydrological processes, has led to this investigation of surface runoff generated during these events in two adjacent micro basins in the Brazilian semi-arid region. The types of plant cover to be investigated were the Phytogeographical Caatinga Domain under regeneration for 35 years (CPDReg) and thinned CPD (CPDThin), which consisted of the elimination of trees with a diameter of <10 cm. Two historical series were considered, one of 40 years (1974-2013) with 2,259 events and the other consisting of 247 rainfall events of <30 mm from 2009 to 2013. The cumulative frequency distribution showed that the series of 247... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eco-hydrological processes; Seasonally Dry Tropical Forest; Thinning; Surface runoff; Rainfall patterns. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000200408 |
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| Fiedler, Carl E.; College of Forestry and Conservation, University of Montana; carl.fiedler@umontana.edu; Friederici, Peter; School of Communication, Northern Arizona University; peter.friederici@nau.edu; Petruncio, Mark; Forestry Program, Yakama Nation; petruncio@yakama.com; Denton, Charles; Ecological Restoration Institute; Charles.Denton@nau.edu; Hacker, W. David; Forestry Department, New Mexico Highlands University; david_hacker@nmhu.edu. |
| There is no one-size-fits-all approach to managing frequent-fire, old-growth forests. However, there are general guidelines to follow: 1) set objectives for both structure (tree density, diameter distribution, tree species composition, spatial arrangement, amount of coarse woody debris) and function (nutrient cycling, desired tree species regeneration); 2) prioritize treatments according to ecological, economic, and social needs and risks; 3) identify the potential treatments (natural fire, prescribed fire, silvicultural cutting) that best meet the objectives and scale of the project; and 4) implement the treatment(s). We discuss each of these guidelines in this article. |
| Tipo: Peer-Reviewed article |
Palavras-chave: Fire; Forest management; Function; Silvicultural treatments; Structure; Thinning. |
| Ano: 2007 |
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| Ferraz Filho,Antonio Carlos; Scolforo,José Roberto Soares; Oliveira,Antonio Donizette de; Mello,José Márcio de. |
| Abstract:The objective of this work was to develop and validate a prognosis system for volume yield and basal area of intensively managed loblolly pine (Pinus taeda) stands, using stand and diameter class models compatible in basal area estimates. The data used in the study were obtained from plantations located in northern Uruguay. For model validation without data loss, a three-phase validation scheme was applied: first, the equations were fitted without the validation database; then, model validation was carried out; and, finally, the database was regrouped to recalibrate the parameter values. After the validation and final parameterization of the models, a simulation of the first commercial thinning was carried out. The developed prognosis system was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pinus taeda; Model validation; Prognosis system; Pruning; Sawtimber; Thinning. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2015000800707 |
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| OLIVEIRA,XIMENA M. DE; RIBEIRO,ANDRESSA; FERRAZ FILHO,ANTONIO CARLOS; MAYRINCK,RAFAELLA C.; LIMA,RENATO R. DE; SCOLFORO,JOSÉ ROBERTO S.. |
| Abstract African mahogany (Khaya spp.) plantations are in expansion in Brazil and in the world. This fact justifies the need for studies related to its growth and yield. This paper aimed to evaluate the performance of single-entry and double-entry models for estimating merchantable and total volume for Khaya ivorensis plantations before the first thinning (7 years) and expected final cut (15 years). Volume data was from 100 and 46 trees in Minas Gerais and Pará states, respectively, by using an electronic dendrometer (Criterion RD 1000). Observed volumes were calculated by Smalian’s formula. To validate the optical dendrometer, 10 trees were felled and had their volume measured, and compared with the volumes measured indirectly. The results showed that... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: African mahogany; Forest mensuration; Non-destructive measurements; Thinning. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703285 |
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| Registros recuperados: 22 | |
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