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Registro Completo |
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Biblioteca(s): |
Embrapa Rondônia. |
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Data corrente: |
05/10/2020 |
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Data da última atualização: |
06/10/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BONGIOLO, E. S.; KAINER, K. A.; CROPPER, W.; STAUDHAMMER, C. L.; WADT, L. H. de O. |
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Afiliação: |
Eduardo S. Bongiolo, University of Florida; Karen A. Kainer, University of Florida; Wendell Cropper, University of Florida; Christina L. Staudhammer, University of Alabama; LUCIA HELENA DE OLIVEIRA WADT, CPAF-RO. |
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Título: |
Swidden fallow management to increase landscape-level Brazil nut productivity. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Forest Ecology and Management, v. 464, n. 118019, 2020. |
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ISSN: |
0378-1127 |
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Idioma: |
Inglês |
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Conteúdo: |
Brazil nut (Bertholletia excelsa Bonpl.) is considered the cornerstone non-timber species of Amazonian conservation. Nuts (or seeds) of this massive tree are harvested by local people living in and near old growth forests, supporting local livelihoods and regional economies. Secondary forests, however, particularly plots previously used for agriculture (swidden fallows), present better B. excelsa seedling and sapling recruitment than mature forest. This study examines the extent to which forest residents could increase nut productivity by allowing their fallows to grow into Brazil nut rich forests. We conducted B. excelsa inventories in the Brazilian state of Acre in abandoned swidden fallows of different ages. We also conducted interviews to determine landowner perspectives on the fallow potential for increasing nut production. An individual-based model, based on in-situ inventories and primary and secondary datasets from prior fieldwork, simulated growth, survivorship and production from the 250 inventoried trees in 18 fallows of varying sizes (from 0.41 to 4.18 ha) and different regrowth stages (12 to 60 years old). These simulation model predictions showed that after 10 years, 2.4% of existing trees would be productive, with an average of 68.6 ± 21.5 fruits per reproductively mature tree in the four fallows that most quickly yielded productive trees. By the final projected time interval (40 years), predictions suggest all fallows will produce fruits with cumulative production averaging 1475 ± 359 fruits ha?1, suggesting an increase in landowner income of US$55.1 ± 13.4 per hectare of fallow. Our simulation model is the first to explore fruit productivity of Brazil nut in secondary forest. It likely underpredicts B. excelsa growth and nut production, considering that swidden fallows provide better resource availability than the forest-derived datasets we used to construct the model equations. In conclusion, our findings support previous research that suggests that higher B. excelsa recruitment rates observed in abandoned swidden fallows could indeed translate into greater adult densities and thus potentially, higher nut production – a conclusion mirrored by most participant landowners. MenosBrazil nut (Bertholletia excelsa Bonpl.) is considered the cornerstone non-timber species of Amazonian conservation. Nuts (or seeds) of this massive tree are harvested by local people living in and near old growth forests, supporting local livelihoods and regional economies. Secondary forests, however, particularly plots previously used for agriculture (swidden fallows), present better B. excelsa seedling and sapling recruitment than mature forest. This study examines the extent to which forest residents could increase nut productivity by allowing their fallows to grow into Brazil nut rich forests. We conducted B. excelsa inventories in the Brazilian state of Acre in abandoned swidden fallows of different ages. We also conducted interviews to determine landowner perspectives on the fallow potential for increasing nut production. An individual-based model, based on in-situ inventories and primary and secondary datasets from prior fieldwork, simulated growth, survivorship and production from the 250 inventoried trees in 18 fallows of varying sizes (from 0.41 to 4.18 ha) and different regrowth stages (12 to 60 years old). These simulation model predictions showed that after 10 years, 2.4% of existing trees would be productive, with an average of 68.6 ± 21.5 fruits per reproductively mature tree in the four fallows that most quickly yielded productive trees. By the final projected time interval (40 years), predictions suggest all fallows will produce fruits with cumulative produ... Mostrar Tudo |
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Palavras-Chave: |
Acre; Amazônia Ocidental; Castanha do brasil; Produto florestal não madeireiro (PFNM); Swidden fallow; Western Amazon. |
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Thesagro: |
Bertholletia Excelsa; Castanha do Para; Pousio; Pratica Cultural; Rendimento. |
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Thesaurus Nal: |
Brazil nuts; Crop yield; Nontimber forest products; Plant cultural practices; Shifting cultivation. |
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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/216397/1/cpafro-18445.pdf
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Marc: |
LEADER 03306naa a2200373 a 4500
001 2125269
005 2020-10-06
008 2020 bl uuuu u00u1 u #d
022 $a0378-1127
100 1 $aBONGIOLO, E. S.
245 $aSwidden fallow management to increase landscape-level Brazil nut productivity.$h[electronic resource]
260 $c2020
520 $aBrazil nut (Bertholletia excelsa Bonpl.) is considered the cornerstone non-timber species of Amazonian conservation. Nuts (or seeds) of this massive tree are harvested by local people living in and near old growth forests, supporting local livelihoods and regional economies. Secondary forests, however, particularly plots previously used for agriculture (swidden fallows), present better B. excelsa seedling and sapling recruitment than mature forest. This study examines the extent to which forest residents could increase nut productivity by allowing their fallows to grow into Brazil nut rich forests. We conducted B. excelsa inventories in the Brazilian state of Acre in abandoned swidden fallows of different ages. We also conducted interviews to determine landowner perspectives on the fallow potential for increasing nut production. An individual-based model, based on in-situ inventories and primary and secondary datasets from prior fieldwork, simulated growth, survivorship and production from the 250 inventoried trees in 18 fallows of varying sizes (from 0.41 to 4.18 ha) and different regrowth stages (12 to 60 years old). These simulation model predictions showed that after 10 years, 2.4% of existing trees would be productive, with an average of 68.6 ± 21.5 fruits per reproductively mature tree in the four fallows that most quickly yielded productive trees. By the final projected time interval (40 years), predictions suggest all fallows will produce fruits with cumulative production averaging 1475 ± 359 fruits ha?1, suggesting an increase in landowner income of US$55.1 ± 13.4 per hectare of fallow. Our simulation model is the first to explore fruit productivity of Brazil nut in secondary forest. It likely underpredicts B. excelsa growth and nut production, considering that swidden fallows provide better resource availability than the forest-derived datasets we used to construct the model equations. In conclusion, our findings support previous research that suggests that higher B. excelsa recruitment rates observed in abandoned swidden fallows could indeed translate into greater adult densities and thus potentially, higher nut production – a conclusion mirrored by most participant landowners.
650 $aBrazil nuts
650 $aCrop yield
650 $aNontimber forest products
650 $aPlant cultural practices
650 $aShifting cultivation
650 $aBertholletia Excelsa
650 $aCastanha do Para
650 $aPousio
650 $aPratica Cultural
650 $aRendimento
653 $aAcre
653 $aAmazônia Ocidental
653 $aCastanha do brasil
653 $aProduto florestal não madeireiro (PFNM)
653 $aSwidden fallow
653 $aWestern Amazon
700 1 $aKAINER, K. A.
700 1 $aCROPPER, W.
700 1 $aSTAUDHAMMER, C. L.
700 1 $aWADT, L. H. de O.
773 $tForest Ecology and Management$gv. 464, n. 118019, 2020.
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Registro original: |
Embrapa Rondônia (CPAF-RO) |
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Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
29/09/2022 |
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Data da última atualização: |
29/09/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
MASCARENHAS, A. R. P.; SCATOLINO, M. V.; DIAS, M. C.; MARTINS, M. A.; MELO, R. R. de; MENDONDÇA, M. C.; TONOLI, G. H. D. |
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Afiliação: |
MARIA ALICE MARTINS, CNPDIA. |
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Título: |
Association of cellulose micro/nanofibrils and silicates for cardboard coating: Technological aspects for packaging. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Industrial Crops & Products, v. 188, e115667, 2022. |
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ISSN: |
0926-6690 |
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DOI: |
https://doi.org/10.1016/j.indcrop.2022.115667 |
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Idioma: |
Inglês |
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Conteúdo: |
Paper coating with cellulose micro/nanofibrils (MFC/NFC) can improve the performance of paper packaging. However, the process cost is high due to the significant energy consumption. The objective of this work was to produce MFC/NFC with pre-treated fibers using calcium silicate (Ca2O4Si) and magnesium silicate (MgO3Si) and evaluate their performance as a coating on cardboard. For the production of MFC/NFC, pre-treatments with Ca2O4Si and MgO3Si reduced energy consumption by ~30 %. The layers added to the cardboard reduced the water vapor permeability, mainly for the coating with 5 % MgO3Si (~98 g mm/kPa− 1 day m2 ). These characteristics indicate that coated paperboard is suitable for packaging bread, cheese, fruit, and vegetables. Suspensions with 5 % and 10 % Ca2O4Si increased the spread of PVAc, PVOH, and printing ink. The coatings reduced the strength and stiffness of the papers by ~50 % compared to the uncoated paper due to the wetting and drying cycles. On the other hand, there was an increase in ductility, which potentiated the paper?s formability. Optimizing application and drying techniques for MFC/NFC and silicate coating formulations can improve the mechanical and barrier properties of the coated papers for multilayer packag |
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Palavras-Chave: |
Barrier properties; Multilayer packaging; Surface energy. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02069naa a2200253 a 4500
001 2146977
005 2022-09-29
008 2022 bl uuuu u00u1 u #d
022 $a0926-6690
024 7 $ahttps://doi.org/10.1016/j.indcrop.2022.115667$2DOI
100 1 $aMASCARENHAS, A. R. P.
245 $aAssociation of cellulose micro/nanofibrils and silicates for cardboard coating$bTechnological aspects for packaging.$h[electronic resource]
260 $c2022
520 $aPaper coating with cellulose micro/nanofibrils (MFC/NFC) can improve the performance of paper packaging. However, the process cost is high due to the significant energy consumption. The objective of this work was to produce MFC/NFC with pre-treated fibers using calcium silicate (Ca2O4Si) and magnesium silicate (MgO3Si) and evaluate their performance as a coating on cardboard. For the production of MFC/NFC, pre-treatments with Ca2O4Si and MgO3Si reduced energy consumption by ~30 %. The layers added to the cardboard reduced the water vapor permeability, mainly for the coating with 5 % MgO3Si (~98 g mm/kPa− 1 day m2 ). These characteristics indicate that coated paperboard is suitable for packaging bread, cheese, fruit, and vegetables. Suspensions with 5 % and 10 % Ca2O4Si increased the spread of PVAc, PVOH, and printing ink. The coatings reduced the strength and stiffness of the papers by ~50 % compared to the uncoated paper due to the wetting and drying cycles. On the other hand, there was an increase in ductility, which potentiated the paper?s formability. Optimizing application and drying techniques for MFC/NFC and silicate coating formulations can improve the mechanical and barrier properties of the coated papers for multilayer packag
653 $aBarrier properties
653 $aMultilayer packaging
653 $aSurface energy
700 1 $aSCATOLINO, M. V.
700 1 $aDIAS, M. C.
700 1 $aMARTINS, M. A.
700 1 $aMELO, R. R. de
700 1 $aMENDONDÇA, M. C.
700 1 $aTONOLI, G. H. D.
773 $tIndustrial Crops & Products$gv. 188, e115667, 2022.
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