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Registro Completo |
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Biblioteca(s): |
Embrapa Amapá. |
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Data corrente: |
16/11/2017 |
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Data da última atualização: |
16/11/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MIRANDA, Z. P.; GUEDES, M. C.; ROSA, S. A.; SCHÖNGART, J. |
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Afiliação: |
ZENAIDE PALHETA MIRANDA, Unifap; MARCELINO CARNEIRO GUEDES, CPAF-AP; S. A. ROSA, IFMG; J. SCHÖNGART, Inpa. |
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Título: |
Volume increment modeling and subsidies for the management of the tree Mora paraensis (Ducke) Ducke based on the study of growth rings. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Trees, p. 1-10, 2017. |
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DOI: |
10.1007/s00468-017-1630-7 |
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Idioma: |
Inglês |
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Conteúdo: |
The aim of the present study was to contribute to increased sustainability in the timber management of Mora paraensis, through the estimation of minimum logging diameter (MLD) and felling cycle, using volume increment models based on tree-ring analysis and allometric relationships. We collected stem discs from 17 trees of five diameter classes. The diameters and heights of the trees were also measured. We estimated tree ages by ring-counting and the radial increment rates by measuring the ring widths with a digital analysis system. We built growth models based on relationships between age, diameter and tree height to estimate volume increment along the tree?s whole life cycle. The maximum current diameter increment in M. paraensis occurs at an age of around 26 years, reaching 4.91 mm |
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Palavras-Chave: |
Anéis de árvore; Ciclo de derrubar; Diâmetro mínimo de corte; Felling cycle; Floodplain forests; Florestas de planalto; Minimum logging diameter; Pracuúba; Tree rings. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/166819/1/CPAF-AP-2017-Volume-increment-modeling-and-subsidies.pdf
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Marc: |
LEADER 01642naa a2200277 a 4500
001 2079906
005 2017-11-16
008 2017 bl uuuu u00u1 u #d
024 7 $a10.1007/s00468-017-1630-7$2DOI
100 1 $aMIRANDA, Z. P.
245 $aVolume increment modeling and subsidies for the management of the tree Mora paraensis (Ducke) Ducke based on the study of growth rings.$h[electronic resource]
260 $c2017
520 $aThe aim of the present study was to contribute to increased sustainability in the timber management of Mora paraensis, through the estimation of minimum logging diameter (MLD) and felling cycle, using volume increment models based on tree-ring analysis and allometric relationships. We collected stem discs from 17 trees of five diameter classes. The diameters and heights of the trees were also measured. We estimated tree ages by ring-counting and the radial increment rates by measuring the ring widths with a digital analysis system. We built growth models based on relationships between age, diameter and tree height to estimate volume increment along the tree?s whole life cycle. The maximum current diameter increment in M. paraensis occurs at an age of around 26 years, reaching 4.91 mm
653 $aAnéis de árvore
653 $aCiclo de derrubar
653 $aDiâmetro mínimo de corte
653 $aFelling cycle
653 $aFloodplain forests
653 $aFlorestas de planalto
653 $aMinimum logging diameter
653 $aPracuúba
653 $aTree rings
700 1 $aGUEDES, M. C.
700 1 $aROSA, S. A.
700 1 $aSCHÖNGART, J.
773 $tTrees, p. 1-10, 2017.
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Registro original: |
Embrapa Amapá (CPAF-AP) |
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Registro Completo
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Biblioteca(s): |
Embrapa Pesca e Aquicultura. |
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Data corrente: |
30/10/2017 |
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Data da última atualização: |
24/11/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
PEDROZA FILHO, M. X.; RODRIGUES, A. P. O.; REZENDE, F. P.; FLORES, R. M. V.; MUNOZ, A. E. P.; BARROSO, R. M. |
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Afiliação: |
MANOEL XAVIER PEDROZA FILHO, CNPASA; ANA PAULA OEDA RODRIGUES, CNPASA; FABRICIO PEREIRA REZENDE, CNPASA; ROBERTO MANOLIO VALLADAO FLORES, CNPASA; ANDREA ELENA PIZARRO MUNOZ, CNPASA; RENATA MELON BARROSO, CNPASA. |
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Título: |
Analysis of a participatory approach for collection of economic data in aquaculture systems at farm level in Brazil. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Custos e @gronegócio on line, Recife, v. 13, n. 1, p. 294-314, jan./mar. 2017. |
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ISSN: |
1808-2882 |
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Idioma: |
Inglês |
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Conteúdo: |
Economic assessment at the farm level requires a robust methodology in order to assure reliability. This paper describes an innovative methodology and analyzes its ability to fill a gap regarding economic methodology for farm level aquaculture in Brazil. This methodology consists of collection of technical parameters, production costs and other economic information by expert panels with value chain agents. Variables are obtained through consensus among panel participants considering the typical farm approach (TFA). All collected data are presented to producers in order to improve comprehension about their performance. A benefit of this methodology includes highly reliable data because information is provided by a representative sample of producers that confirm it in a consensus process. Moreover, data collection costs are low in comparison to individual interviews or survey methods. Continuous updating of inputs prices and the high level of participation of producers are other assets of this method. Despite its effectiveness the method presents some challenges including: (a) the heterogeneity of producer profiles and consequent difficulty in standardizing data, (b) the logistic requirements related to organization of meetings, and (c) mobilization of producers and other panel participants in order to assure their representative presence in the meeting. |
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Palavras-Chave: |
Panel method; Typical farmer. |
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Thesagro: |
Agronegócio; Aquicultura; Custo de produção. |
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Thesaurus NAL: |
Fish farms; Production costs. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/165803/1/CNPASA-2017-ap.pdf
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Marc: |
LEADER 02225naa a2200277 a 4500
001 2078459
005 2017-11-24
008 2017 bl uuuu u00u1 u #d
022 $a1808-2882
100 1 $aPEDROZA FILHO, M. X.
245 $aAnalysis of a participatory approach for collection of economic data in aquaculture systems at farm level in Brazil.$h[electronic resource]
260 $c2017
520 $aEconomic assessment at the farm level requires a robust methodology in order to assure reliability. This paper describes an innovative methodology and analyzes its ability to fill a gap regarding economic methodology for farm level aquaculture in Brazil. This methodology consists of collection of technical parameters, production costs and other economic information by expert panels with value chain agents. Variables are obtained through consensus among panel participants considering the typical farm approach (TFA). All collected data are presented to producers in order to improve comprehension about their performance. A benefit of this methodology includes highly reliable data because information is provided by a representative sample of producers that confirm it in a consensus process. Moreover, data collection costs are low in comparison to individual interviews or survey methods. Continuous updating of inputs prices and the high level of participation of producers are other assets of this method. Despite its effectiveness the method presents some challenges including: (a) the heterogeneity of producer profiles and consequent difficulty in standardizing data, (b) the logistic requirements related to organization of meetings, and (c) mobilization of producers and other panel participants in order to assure their representative presence in the meeting.
650 $aFish farms
650 $aProduction costs
650 $aAgronegócio
650 $aAquicultura
650 $aCusto de produção
653 $aPanel method
653 $aTypical farmer
700 1 $aRODRIGUES, A. P. O.
700 1 $aREZENDE, F. P.
700 1 $aFLORES, R. M. V.
700 1 $aMUNOZ, A. E. P.
700 1 $aBARROSO, R. M.
773 $tCustos e @gronegócio on line, Recife$gv. 13, n. 1, p. 294-314, jan./mar. 2017.
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Registro original: |
Embrapa Pesca e Aquicultura (CNPASA) |
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