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Registros recuperados : 32 | |
7. | ![Imagem marcado/desmarcado](/consulta/web/img/desmarcado.png) | FERNANDES, T. S. D.; FOLSTER, H.; FASSBENDER, W.; VIELHAUER, K. Recuperation of a degraded pasture using Acacia mangium to return to the traditional shifting system in Northeast of Para-Brasil. In: LIEBEREI, R.; BIANCHI, H.; VOB, K., ed. Proceedings of the third SHIFT-Workshop, Manaus march 15-19, 1998. Bonn: Bundesministerium fur Bildung und Forschung, 1998. p.119-124. Biblioteca(s): Embrapa Florestas. |
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8. | ![Imagem marcado/desmarcado](/consulta/web/img/desmarcado.png) | VLEK, P. L. G.; SERRAO, A. S.; FOLSTER, H. Secondary forests and fallow vegetation in the Eastern Amazon region a brief overview of the project approach. In: LIEBEREI, R.; BIANCHI, H.; VOB, K., ed. Proceedings of the third SHIFT-Workshop, Manaus march 15-19, 1998. Bonn: Bundesministerium fur Bildung und Forschung, 1998. p.45-48. Biblioteca(s): Embrapa Florestas. |
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13. | ![Imagem marcado/desmarcado](/consulta/web/img/desmarcado.png) | SOMMER, R.; SÁ, T. D. de A.; VIELHAUER, K.; VLEK, P. L. G.; FOLSTER, H. Deep rooting secondary vegetation - an indispensable component of shifting cultivation? In: GERMAN-BRAZILIAN WORKSHOP ON NEOTROPICAL ECOSYSTEMS - ARCHIEVEMENTS AND PROSPECTS OF COOPERATIVE RESEARCH, 2000, Hamburg. Proceedings. Geesthacht: GKSS, 2002. p. 212. Editado por Reinhard Lieberei, Helmut Bianchi, Vera Boehm, Christoph Reisdorff. Biblioteca(s): Embrapa Amazônia Oriental. |
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15. | ![Imagem marcado/desmarcado](/consulta/web/img/desmarcado.png) | HEUVELDOP, J.; FASSBENDER, H. W.; ALPIZAR, L.; ENRIQUEZ, G.; FOLSTER, H. Modelling agroforestry system of cacao (Theobroma cacao) with laurel (Cordia alliodora) and poro (Erythrina poeppigiana) in Costa Rica. II. Cacao and wood production, litter production and decomposition. Agroforestry Systems, v.6, n.1, p.37-48, 1988. Biblioteca(s): Embrapa Pantanal. |
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17. | ![Imagem marcado/desmarcado](/consulta/web/img/desmarcado.png) | SOMMER, R.; VLEK, P. L. G.; FOLSTER, H.; SÁ, T. D. de A. Slash and mulch to reduce nutrient losses in shifting cultivation in the Eastern Amazon. In: SEMINÁRIO SOBRE MANEJO DA VEGETAÇÃO SECUNDÁRIA PARA A SUSTENTABILIDADE DA AGRICULTURA FAMILIAR DA EMBRAPA AMAZÔNIA ORIENTAL, 1999, Belém, PA. Anais. Belém, PA: Embrapa Amazônia Oriental: CNPq, 2000. p. 80-82. (Embrapa Amazônia Oriental. Documentos, 69). Biblioteca(s): Embrapa Amazônia Oriental. |
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18. | ![Imagem marcado/desmarcado](/consulta/web/img/desmarcado.png) | SOMMER, R.; CARVALHO, E. J. M.; VLEK, P. L. G.; FOLSTER, H. Soil water extraction through a secondary vegetation during the dry season in 1997 in Eastern Amazonia. In: LIEBEREI, R.; BIANCHI, H.; VOB, K., ed. Proceedings of the third SHIFT-Workshop, Manaus march 15-19, 1998. Bonn: Bundesministerium fur Bildung und Forschung, 1998. p.177-179. Biblioteca(s): Embrapa Florestas. |
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20. | ![Imagem marcado/desmarcado](/consulta/web/img/desmarcado.png) | BRIENZA JUNIOR, S.; DENICH, M.; FOLSTER, H.; VLEK, P. L. G. Enriching fallow vegetation in the eastern amazon of Brazil towards improving land-use. In: GERMAN-BRAZILIAN WORKSHOP ON NEOTROPICAL ECOSYSTEMS - ARCHIEVEMENTS AND PROSPECTS OF COOPERATIVE RESEARCH, 2000, Hamburg. Proceedings. Geesthacht: GKSS, 2002. p. 683-686. Editado por Reinhard Lieberei, Helmut Bianchi, Vera Boehm, Christoph Reisdorff. Biblioteca(s): Embrapa Amazônia Oriental. |
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Registros recuperados : 32 | |
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![](/consulta/web/img/deny.png) | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
10/11/1997 |
Data da última atualização: |
27/01/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
HÖLSCHER, D.; MOLLER, M. R. F.; DENICH, M.; FÖLSTER, H. |
Afiliação: |
D. HÖLSCHER, UNIVERSITY OF GÖTTINGEN; MARIA REGINA FREIRE MOLLER, CPATU; M. DENICH, UNIVERSITY OF GÖTTINGEN; H. FÖLSTER, UNIVERSITY OF GÖTTINGEN. |
Título: |
Nutrient input-output budget of shifting agriculture in Eastern Amazonia. |
Ano de publicação: |
1997 |
Fonte/Imprenta: |
Nutrient Cycling in Agroecosystems, v. 47, n. 1, p. 49-57, 1997. |
DOI: |
https://doi.org/10.1007/BF01985718 |
Idioma: |
Inglês |
Conteúdo: |
A case study on the nutrient input-output budget of slash and burn agriculture was carried out in Northeast-Pará, Brazil, where such a land-use system has been practised for about 100 years. A common cropping period lasts for two years and the fields lie fallow for 4 to 8 years. We quantified rates of deposition, fertilization, and losses due to the burn, harvest and leaching. Six fields of different phases in the rotational cycle were under study during a 19 month period. During the fallow period, the input of Na, K, Mg, N, P and S via deposition exceeded the estimated losses with the seepage water. The Ca budget was almost balanced. The balance of fields in the transition from the fallow to the cropping phase was negative for Na, K, Ca, Mg, N, and S. The P balance was positive when NPK fertilizer was applied, and negative without fertilizer application. The nutrient balance for K, Mg, Ca, N, and P was also negative on the field in transition from the cropping to the fallow period. The nutrient budget for an entire land-use cycle of 9 years was estimated by the "false time series approach". In the case of an NPK fertilization during the cropping period there were net losses of 75 kg K ha?1, 125 kg Ca ha?1, 16 kg Mg ha?1, 285 kg N ha'1 and 13 kg S ha'1. Na (86 kg ha'1) and P (11 kg ha?1) were accumulated. The harvest was the most important flux for the K (61%) and P (62%) output. The element transfer into the atmosphere during the burn caused the main losses of N (60%), S (65%), Ca (58%) and Mg (41%). The most important path of Na loss was leaching (92%). The net K losses were severe as they represented 45% of the K store found extractable in the soil down to 1m depth and in the above ground biomass. The presented results may be useful in planning a sustainable and environmentally protective method of land-use within a shifting cultivation system. It is strongly recommended that slash burning be abandoned in order to keep the nutrients in the ecosystem. MenosA case study on the nutrient input-output budget of slash and burn agriculture was carried out in Northeast-Pará, Brazil, where such a land-use system has been practised for about 100 years. A common cropping period lasts for two years and the fields lie fallow for 4 to 8 years. We quantified rates of deposition, fertilization, and losses due to the burn, harvest and leaching. Six fields of different phases in the rotational cycle were under study during a 19 month period. During the fallow period, the input of Na, K, Mg, N, P and S via deposition exceeded the estimated losses with the seepage water. The Ca budget was almost balanced. The balance of fields in the transition from the fallow to the cropping phase was negative for Na, K, Ca, Mg, N, and S. The P balance was positive when NPK fertilizer was applied, and negative without fertilizer application. The nutrient balance for K, Mg, Ca, N, and P was also negative on the field in transition from the cropping to the fallow period. The nutrient budget for an entire land-use cycle of 9 years was estimated by the "false time series approach". In the case of an NPK fertilization during the cropping period there were net losses of 75 kg K ha?1, 125 kg Ca ha?1, 16 kg Mg ha?1, 285 kg N ha'1 and 13 kg S ha'1. Na (86 kg ha'1) and P (11 kg ha?1) were accumulated. The harvest was the most important flux for the K (61%) and P (62%) output. The element transfer into the atmosphere during the burn caused the main losses of N (60%), S (6... Mostrar Tudo |
Palavras-Chave: |
Brasil; Ciclagem de nutriente; Cycling; Pará; Zona Bragantina. |
Thesagro: |
Cultivo Migratório; Uso da Terra. |
Thesaurus NAL: |
Amazonia; land use; shifting cultivation. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 02808naa a2200289 a 4500 001 1397796 005 2023-01-27 008 1997 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1007/BF01985718$2DOI 100 1 $aHÖLSCHER, D. 245 $aNutrient input-output budget of shifting agriculture in Eastern Amazonia.$h[electronic resource] 260 $c1997 520 $aA case study on the nutrient input-output budget of slash and burn agriculture was carried out in Northeast-Pará, Brazil, where such a land-use system has been practised for about 100 years. A common cropping period lasts for two years and the fields lie fallow for 4 to 8 years. We quantified rates of deposition, fertilization, and losses due to the burn, harvest and leaching. Six fields of different phases in the rotational cycle were under study during a 19 month period. During the fallow period, the input of Na, K, Mg, N, P and S via deposition exceeded the estimated losses with the seepage water. The Ca budget was almost balanced. The balance of fields in the transition from the fallow to the cropping phase was negative for Na, K, Ca, Mg, N, and S. The P balance was positive when NPK fertilizer was applied, and negative without fertilizer application. The nutrient balance for K, Mg, Ca, N, and P was also negative on the field in transition from the cropping to the fallow period. The nutrient budget for an entire land-use cycle of 9 years was estimated by the "false time series approach". In the case of an NPK fertilization during the cropping period there were net losses of 75 kg K ha?1, 125 kg Ca ha?1, 16 kg Mg ha?1, 285 kg N ha'1 and 13 kg S ha'1. Na (86 kg ha'1) and P (11 kg ha?1) were accumulated. The harvest was the most important flux for the K (61%) and P (62%) output. The element transfer into the atmosphere during the burn caused the main losses of N (60%), S (65%), Ca (58%) and Mg (41%). The most important path of Na loss was leaching (92%). The net K losses were severe as they represented 45% of the K store found extractable in the soil down to 1m depth and in the above ground biomass. The presented results may be useful in planning a sustainable and environmentally protective method of land-use within a shifting cultivation system. It is strongly recommended that slash burning be abandoned in order to keep the nutrients in the ecosystem. 650 $aAmazonia 650 $aland use 650 $ashifting cultivation 650 $aCultivo Migratório 650 $aUso da Terra 653 $aBrasil 653 $aCiclagem de nutriente 653 $aCycling 653 $aPará 653 $aZona Bragantina 700 1 $aMOLLER, M. R. F. 700 1 $aDENICH, M. 700 1 $aFÖLSTER, H. 773 $tNutrient Cycling in Agroecosystems$gv. 47, n. 1, p. 49-57, 1997.
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