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 | Acesso ao texto completo restrito à biblioteca da Embrapa Semiárido. Para informações adicionais entre em contato com cpatsa.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
24/09/2012 |
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Data da última atualização: |
18/10/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
DRUMOND, M. A.; OLIVEIRA, V. R. de; RIBASKI, J.; SANTOS, P. E. T. dos; TAVARES, J. A. |
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Afiliação: |
MARCOS ANTONIO DRUMOND, CPATSA; VISELDO RIBEIRO DE OLIVEIRA, CPATSA; JORGE RIBASKI, CNPF; PAULO EDUARDO TELLES DOS SANTOS, CNPF; IPA. |
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Título: |
Performance of two hybrid clones of eucalyptus planted under five spacings in the Araripe plateau, Pernambuco, Brazil. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Acta Horticulturae, Leuven, n. 959, p. 167-172, 2012. |
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DOI: |
10.17660/ActaHortic.2012.959.20 |
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Idioma: |
Inglês |
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Notas: |
Edição do Proceedings of the III International Symposium on Guava and other Myrtaceae, Petrolina, sept. 2012. |
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Conteúdo: |
This study aimed to evaluate the effects of different spacings on wood productivity of two hybrid clones of Eucalyptus, namely E. brassiana × E. urophylla and E. grandis × E. camaldulensis, in the Araripe Plateau. The field trials were established in February 2006 at the Experimental Station of Araripina (latitude: 7°27’50”S; longitude: 40°24’38”W, altitude: 828 m), belonging to the Agronomic Institute of the State of Pernambuco - IPA. Five spacings were tested: 3.0×2.0, 3.0×2.5, 3.0×3.0, 3.0×3.5 and 3.0×4.0 m. The experimental design adopted for both trials was randomized blocks with four replications and plots of 64 plants. The effective areas ranged from 216 to 432 m2, and the total experimental area of 11,520 m2. At the age of four years it was found that there were no statistical differences among the means for the variables evaluated in E. brassiana × E. urophylla. For survival, total height, DBH, wood production and mean annual increment the means were 93%, 14.8 m, 12.3 cm, 98.7 m3 ha-1 and 24.7 m3/ha y-1, respectively. For E. grandis × E. camaldulensis, the means for the same variables previously described were 89.4%, 13.9 m, 12 cm, 83.3 m3 ha-1 and 20.8 m3/ha y-1, respectively. Differently from the first, for this hybrid only the survival and height means did not differ significantly from each other. Specifically for DBH, it was noted that the highest value of 13.2 cm, corresponding to the spacing 3.0×4.0 m, did not differ statistically of 12.9 cm obtained from the spacing of 3.0×3.5 m. Nevertheless, these values were significantly different from the others. The highest production of wood was 105 m3 ha-1 at the spacing 3.0×2.0 m, however, there is no significant difference comparing to 86.3 m3 ha-1 achieved at the spacing 3.0×2.5 m. Likewise, the mean annual increment (MAI) increased inversely to the spacing. We concluded that the number of plants per hectare plays an emphatic role in increasing the wood productivity of these two hybrids at this stage of development. MenosThis study aimed to evaluate the effects of different spacings on wood productivity of two hybrid clones of Eucalyptus, namely E. brassiana × E. urophylla and E. grandis × E. camaldulensis, in the Araripe Plateau. The field trials were established in February 2006 at the Experimental Station of Araripina (latitude: 7°27’50”S; longitude: 40°24’38”W, altitude: 828 m), belonging to the Agronomic Institute of the State of Pernambuco - IPA. Five spacings were tested: 3.0×2.0, 3.0×2.5, 3.0×3.0, 3.0×3.5 and 3.0×4.0 m. The experimental design adopted for both trials was randomized blocks with four replications and plots of 64 plants. The effective areas ranged from 216 to 432 m2, and the total experimental area of 11,520 m2. At the age of four years it was found that there were no statistical differences among the means for the variables evaluated in E. brassiana × E. urophylla. For survival, total height, DBH, wood production and mean annual increment the means were 93%, 14.8 m, 12.3 cm, 98.7 m3 ha-1 and 24.7 m3/ha y-1, respectively. For E. grandis × E. camaldulensis, the means for the same variables previously described were 89.4%, 13.9 m, 12 cm, 83.3 m3 ha-1 and 20.8 m3/ha y-1, respectively. Differently from the first, for this hybrid only the survival and height means did not differ significantly from each other. Specifically for DBH, it was noted that the highest value of 13.2 cm, corresponding to the spacing 3.0×4.0 m, did not differ statistically of 12.9 cm obtained from the ... Mostrar Tudo |
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Palavras-Chave: |
Densidade de plantas; Floresta energética; Pernambuco. |
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Thesagro: |
Floresta; Reflorestamento. |
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Thesaurus Nal: |
Dry forests; Eucalyptus; Forest management. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 02988naa a2200289 a 4500
001 1934336
005 2018-10-18
008 2012 bl uuuu u00u1 u #d
024 7 $a10.17660/ActaHortic.2012.959.20$2DOI
100 1 $aDRUMOND, M. A.
245 $aPerformance of two hybrid clones of eucalyptus planted under five spacings in the Araripe plateau, Pernambuco, Brazil.
260 $c2012
500 $aEdição do Proceedings of the III International Symposium on Guava and other Myrtaceae, Petrolina, sept. 2012.
520 $aThis study aimed to evaluate the effects of different spacings on wood productivity of two hybrid clones of Eucalyptus, namely E. brassiana × E. urophylla and E. grandis × E. camaldulensis, in the Araripe Plateau. The field trials were established in February 2006 at the Experimental Station of Araripina (latitude: 7°27’50”S; longitude: 40°24’38”W, altitude: 828 m), belonging to the Agronomic Institute of the State of Pernambuco - IPA. Five spacings were tested: 3.0×2.0, 3.0×2.5, 3.0×3.0, 3.0×3.5 and 3.0×4.0 m. The experimental design adopted for both trials was randomized blocks with four replications and plots of 64 plants. The effective areas ranged from 216 to 432 m2, and the total experimental area of 11,520 m2. At the age of four years it was found that there were no statistical differences among the means for the variables evaluated in E. brassiana × E. urophylla. For survival, total height, DBH, wood production and mean annual increment the means were 93%, 14.8 m, 12.3 cm, 98.7 m3 ha-1 and 24.7 m3/ha y-1, respectively. For E. grandis × E. camaldulensis, the means for the same variables previously described were 89.4%, 13.9 m, 12 cm, 83.3 m3 ha-1 and 20.8 m3/ha y-1, respectively. Differently from the first, for this hybrid only the survival and height means did not differ significantly from each other. Specifically for DBH, it was noted that the highest value of 13.2 cm, corresponding to the spacing 3.0×4.0 m, did not differ statistically of 12.9 cm obtained from the spacing of 3.0×3.5 m. Nevertheless, these values were significantly different from the others. The highest production of wood was 105 m3 ha-1 at the spacing 3.0×2.0 m, however, there is no significant difference comparing to 86.3 m3 ha-1 achieved at the spacing 3.0×2.5 m. Likewise, the mean annual increment (MAI) increased inversely to the spacing. We concluded that the number of plants per hectare plays an emphatic role in increasing the wood productivity of these two hybrids at this stage of development.
650 $aDry forests
650 $aEucalyptus
650 $aForest management
650 $aFloresta
650 $aReflorestamento
653 $aDensidade de plantas
653 $aFloresta energética
653 $aPernambuco
700 1 $aOLIVEIRA, V. R. de
700 1 $aRIBASKI, J.
700 1 $aSANTOS, P. E. T. dos
700 1 $aTAVARES, J. A.
773 $tActa Horticulturae, Leuven$gn. 959, p. 167-172, 2012.
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Embrapa Semiárido (CPATSA) |
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Registro Completo
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
13/10/2021 |
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Data da última atualização: |
13/10/2021 |
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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: |
TORKAMAN, P.; VEIGA, M. M.; LIMA, L. R. P. de ANDRADE; OLIVEIRA, L. A. de; MOTTA, J. da S.; JESUS, J. L. de; LAVKULICH, L. M. |
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Afiliação: |
P. TORKAMAN, University of British Columbia; M. M. VEIGA, University of British Columbia; L. R. P. DE ANDRADE LIMA, UFBA; LUCIANA ALVES DE OLIVEIRA, CNPMF; JOSELITO DA SILVA MOTTA, CNPMF; JACIENE LOPES DE JESUS, CNPMF; L. M. LAVKULICH, University of British Columbia. |
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Título: |
Leaching gold with cassava: an option to eliminate mercury use in artisanal gold mining. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Journal of Cleaner Production, v. 311, 2021. |
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ISSN: |
0959-6526 |
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Idioma: |
Português |
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Conteúdo: |
ABSTRACT Mercury pollution from artisanal gold mining causes severe environmental and health problems, especially to operators and people living around the processing facilities. Over 2000 tonnes/a of mercury is released to the environment by the artisanal miners which is the largest man-made source of mercury pollution. Here we present a novel method using a local plant, cassava, common in many artisanal mining areas in Latin America, Africa, and Asia, to dissolve gold from ores. In our experiments, we used a liquid by-product of cassava flour manufacturing, ?manipueira? to leach gold from the gold ore. It contains hydrogen cyanide, generating from the hydrolysis of cyanogenic glycosides in the cassava plant. The results were very promising to replace the use of mercury, as approximately 50% of the gold content was extracted from the ore in 24 h. |
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Thesagro: |
Mandioca. |
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Thesaurus NAL: |
Cassava. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01515naa a2200229 a 4500
001 2135261
005 2021-10-13
008 2021 bl uuuu u00u1 u #d
022 $a0959-6526
100 1 $aTORKAMAN, P.
245 $aLeaching gold with cassava$ban option to eliminate mercury use in artisanal gold mining.$h[electronic resource]
260 $c2021
520 $aABSTRACT Mercury pollution from artisanal gold mining causes severe environmental and health problems, especially to operators and people living around the processing facilities. Over 2000 tonnes/a of mercury is released to the environment by the artisanal miners which is the largest man-made source of mercury pollution. Here we present a novel method using a local plant, cassava, common in many artisanal mining areas in Latin America, Africa, and Asia, to dissolve gold from ores. In our experiments, we used a liquid by-product of cassava flour manufacturing, ?manipueira? to leach gold from the gold ore. It contains hydrogen cyanide, generating from the hydrolysis of cyanogenic glycosides in the cassava plant. The results were very promising to replace the use of mercury, as approximately 50% of the gold content was extracted from the ore in 24 h.
650 $aCassava
650 $aMandioca
700 1 $aVEIGA, M. M.
700 1 $aLIMA, L. R. P. de ANDRADE
700 1 $aOLIVEIRA, L. A. de
700 1 $aMOTTA, J. da S.
700 1 $aJESUS, J. L. de
700 1 $aLAVKULICH, L. M.
773 $tJournal of Cleaner Production$gv. 311, 2021.
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Embrapa Mandioca e Fruticultura (CNPMF) |
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