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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
02/12/1999 |
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Data da última atualização: |
06/12/2022 |
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Autoria: |
HÖLSCHER, D.; LUDWIG, B.; MÖLLER, R. F.; FÖLSTER, H. |
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Afiliação: |
Institute of Soil Science and Forest Nutrition, University of Göttingen; Institute of Soil Science and Forest Nutrition, University of Göttingen; MARIA REGINA FREIRE MÖLLER, CPATU; Institute of Soil Science and Forest Nutrition, University of Göttingen. |
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Título: |
Dynamic of soil chemical parameters in shifting agriculture in the Eastern Amazon. |
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Ano de publicação: |
1997 |
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Fonte/Imprenta: |
Agriculture, Ecosystems and Environment, v. 66, n. 2, p. 153-163, Dec. 1997. |
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Idioma: |
Inglês |
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Conteúdo: |
In Northeast Pará, Brazil, shifting agriculture by land settlers has been practiced for around 100 years. After a common cropping period of 2 years the fields are left fallow for 4 to 8 years. Changes in extractable cations and C, N, and P of soils were studied on six fields which were under different phases of the rotational cycle. The chemical composition of soil solutions was also monitored for a period of 19 months. In topsoils, the differences in C and N contents and extractable Ca and Al could be related to the landuse history expressed as time elapsed since last burn. Repeated sampling on two ?slash and burn? plots, showed significant increases in pH, CEC, extractable K, Ca and Mg, but decreases in extractable Na and Al, C and N content in the plots from 7-year old fallow to the first-year cropping field. Soil solution chemistry at 105 cm depth did not change with increasing fallow age. On the ?slash and burn? field, big variations in solute composition at 10 cm depth were observed during the initial months of the cropping period. In the soil solutions after burning, Ca concentrations ranged from 4.8 to 30.1 mg l?1, but decreased to values between 1.2 and 2.7 mg l?1 within 2 months. Slash burning and subsequent cropping lead to increases of Cl? and NO?3 in the soil solution at 105 cm depth. A small dose of NPK fertilizer (11 kg N ha?1, 13 kg P ha?1 and 17 kg K ha?1) did not increase NO?3 concentration and chloride concentrations at this depth increased to a small extent. After the harvest of cassava, high nitrate concentrations of 11 mg N l?1 were observed. NO?3 and Cl? concentrations on the cropping fields were significantly correlated (n = 350) with the sum of the concentration of the Mb cations (Na, K, Ca, Mg), (NO?3?Mb, r = 0.82; Cl??Mb, r = 0.81). Nitrate also showed significant correlations with protons (r = 0.59) and Al (r = 0.47) concentrations. Ion concentrations in the soil solution can be reduced by agricultural management. During harvest, the aboveground vegetation should not be removed completely in one single step. If clear cutting cannot be avoided, the timing should be chosen as to keep some vegetation with high uptake potential at the beginning of the rainy season. A small dose of NPK-fertilizer stimulated the nutrient uptake by the vegetation and did not enhance nutrient concentrations in the seepage water. MenosIn Northeast Pará, Brazil, shifting agriculture by land settlers has been practiced for around 100 years. After a common cropping period of 2 years the fields are left fallow for 4 to 8 years. Changes in extractable cations and C, N, and P of soils were studied on six fields which were under different phases of the rotational cycle. The chemical composition of soil solutions was also monitored for a period of 19 months. In topsoils, the differences in C and N contents and extractable Ca and Al could be related to the landuse history expressed as time elapsed since last burn. Repeated sampling on two ?slash and burn? plots, showed significant increases in pH, CEC, extractable K, Ca and Mg, but decreases in extractable Na and Al, C and N content in the plots from 7-year old fallow to the first-year cropping field. Soil solution chemistry at 105 cm depth did not change with increasing fallow age. On the ?slash and burn? field, big variations in solute composition at 10 cm depth were observed during the initial months of the cropping period. In the soil solutions after burning, Ca concentrations ranged from 4.8 to 30.1 mg l?1, but decreased to values between 1.2 and 2.7 mg l?1 within 2 months. Slash burning and subsequent cropping lead to increases of Cl? and NO?3 in the soil solution at 105 cm depth. A small dose of NPK fertilizer (11 kg N ha?1, 13 kg P ha?1 and 17 kg K ha?1) did not increase NO?3 concentration and chloride concentrations at this depth increased to a small exte... Mostrar Tudo |
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Palavras-Chave: |
Brasil; Igarapé-Açu; Pará. |
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Thesagro: |
Cultivo Migratório; Mecânica do Solo; Química do Solo. |
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Thesaurus Nal: |
Amazonia; shifting cultivation; soil chemistry; soil mechanics. |
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Categoria do assunto: |
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Marc: |
LEADER 03168naa a2200277 a 4500
001 1399998
005 2022-12-06
008 1997 bl uuuu u00u1 u #d
100 1 $aHÖLSCHER, D.
245 $aDynamic of soil chemical parameters in shifting agriculture in the Eastern Amazon.$h[electronic resource]
260 $c1997
520 $aIn Northeast Pará, Brazil, shifting agriculture by land settlers has been practiced for around 100 years. After a common cropping period of 2 years the fields are left fallow for 4 to 8 years. Changes in extractable cations and C, N, and P of soils were studied on six fields which were under different phases of the rotational cycle. The chemical composition of soil solutions was also monitored for a period of 19 months. In topsoils, the differences in C and N contents and extractable Ca and Al could be related to the landuse history expressed as time elapsed since last burn. Repeated sampling on two ?slash and burn? plots, showed significant increases in pH, CEC, extractable K, Ca and Mg, but decreases in extractable Na and Al, C and N content in the plots from 7-year old fallow to the first-year cropping field. Soil solution chemistry at 105 cm depth did not change with increasing fallow age. On the ?slash and burn? field, big variations in solute composition at 10 cm depth were observed during the initial months of the cropping period. In the soil solutions after burning, Ca concentrations ranged from 4.8 to 30.1 mg l?1, but decreased to values between 1.2 and 2.7 mg l?1 within 2 months. Slash burning and subsequent cropping lead to increases of Cl? and NO?3 in the soil solution at 105 cm depth. A small dose of NPK fertilizer (11 kg N ha?1, 13 kg P ha?1 and 17 kg K ha?1) did not increase NO?3 concentration and chloride concentrations at this depth increased to a small extent. After the harvest of cassava, high nitrate concentrations of 11 mg N l?1 were observed. NO?3 and Cl? concentrations on the cropping fields were significantly correlated (n = 350) with the sum of the concentration of the Mb cations (Na, K, Ca, Mg), (NO?3?Mb, r = 0.82; Cl??Mb, r = 0.81). Nitrate also showed significant correlations with protons (r = 0.59) and Al (r = 0.47) concentrations. Ion concentrations in the soil solution can be reduced by agricultural management. During harvest, the aboveground vegetation should not be removed completely in one single step. If clear cutting cannot be avoided, the timing should be chosen as to keep some vegetation with high uptake potential at the beginning of the rainy season. A small dose of NPK-fertilizer stimulated the nutrient uptake by the vegetation and did not enhance nutrient concentrations in the seepage water.
650 $aAmazonia
650 $ashifting cultivation
650 $asoil chemistry
650 $asoil mechanics
650 $aCultivo Migratório
650 $aMecânica do Solo
650 $aQuímica do Solo
653 $aBrasil
653 $aIgarapé-Açu
653 $aPará
700 1 $aLUDWIG, B.
700 1 $aMÖLLER, R. F.
700 1 $aFÖLSTER, H.
773 $tAgriculture, Ecosystems and Environment$gv. 66, n. 2, p. 153-163, Dec. 1997.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Biblioteca |
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| Registros recuperados : 24 | |
| 7. |  | 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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| 8. | | 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. 185. Editado por Reinhard Lieberei, Helmut Bianchi, Vera Boehm, Christoph Reisdorff.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 9. | | BRIENZA JUNIOR, S.; DENICH, M.; FOLSTER, H.; VLEG, P. L. G. Fallow vegetation enrichment with leguminous trees in the Eastern Amazon of Brazil: trees performance. In: GERMAN-BRAZILIAN WORKSHOP ON NEOTROPICAL ECOSYSTEMS - ARCHIEVEMENTS AND PROSPECTS OF COOPERATIVE RESEARCH, 2000, Hamburg. Proceedings. Geesthacht: GKSS, 2002. 1 CD-ROM. Editado por Reinhard Lieberei, Helmut Bianchi, Vera Boehm, Christoph Reisdorff.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 10. | | BRIENZA JUNIOR, S.; DENICH, M.; FÖLSTER, H.; VLEK, P. L. G. Fallow vegetation enrichment with leguminous trees in the Eastern Amazon of Brazil: trees performance. In: GERMAN-BRAZILIAN WORKSHOP ON NEOTROPICAL ECOSYSTEMS - ARCHIEVEMENTS AND PROSPECTS OF COOPERATIVE RESEARCH, 2000, Hamburg. Proceedings. Geesthacht: GKSS, 2002. p. 336. Anexo 1 CD-ROM nº 0084, completo. Publicado também em GERMAN-BRAZILIAN WORKSHOP ON NEOTROPICAL ECOSYSTEMS: ARCHIEMENTS AND PROPECTS OF COOPERATIVE RESEARCH, 2000, Hamburg. Program and abstracts. Hamburg: SHIFT: MADAM: WAVES, 2000. p. 266.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 11. | | BRIENZA JUNIOR, S.; DENICH, M.; FOLSTER, H.; VLEK, P. L. G. Litterfall and litter in enriched fallow with fast growing trees in the eastern Amazon of Brazil. In: GERMAN-BRAZILIAN WORKSHOP ON NEOTROPICAL ECOSYSTEMS - ARCHIEVEMENTS AND PROSPECTS OF COOPERATIVE RESEARCH, 2000, Hamburg. Proceedings. Geesthacht: GKSS, 2002. 1 CD-ROM. Editado por Reinhard Lieberei, Helmut Bianchi, Vera Boehm, Christoph Reisdorff.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 12. | | BRIENZA JUNIOR, S.; DENICH, M.; FOLSTER, H.; VLEK, P. L. G. Litterfall and litter in eriched fallow vegetation with fast growing trees in the eartern amazon of Brazil. In: GERMAN-BRAZILIAN WORKSHOP ON NEOTROPICAL ECOSYSTEMS - ARCHIEVEMENTS AND PROSPECTS OF COOPERATIVE RESEARCH, 2000, Hamburg. Proceedings. Geesthacht: GKSS, 2002. p. 336-337. Editado por Reinhard Lieberei, Helmut Bianchi, Vera Boehm, Christoph Reisdorff. Anexo 1 CD-ROM nº 0084, completo. Publicado também em GERMAN-BRAZILIAN WORKSHOP ON NEOTROPICAL ECOSYSTEMS: ARCHIEMENTS AND PROPECTS OF COOPERATIVE RESEARCH,...| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 13. | | 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. | | KATO, O. R.; KATO, M. do S. A.; DENICH, M.; FÖLSTER, H.; VLEK, P. L. G. Dinâmica de nutrientes na solução do solo em sistema de cultivo sem o uso do fogo no preparo de área no nordeste paraense. 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. 112-115. (Embrapa Amazônia Oriental. Documentos, 69).| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 18. | | 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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| 20. | | SOMMER, R.; SÁ, T. D. A. de; VIELHAUER, K.; VLEK, P. L. G.; FÖLSTER, H. Water and nutrient balance under slash-and-burn agriculture in the eastern Amazon, Brasil - the role of a deep rooting fallow vegetation. In: HORST, W. J.; SCHENK, M. K.; BURKERT, A.; CLAASSEN, N.; FLESSA, H.; FROMMER, W. B.; GOLDBACH, H.; OLFS, H.-W.; ROMHELD, V.; SATTELMACHER, B.; SCHMIDHALTER, U.; SCHUBERT, S.; WIRÉN, N. v.; WITTENMAYER, L. (Ed.). Plant nutrition: food security and sustainability of agro-ecosystems through basic and applied research. Dordrecht: Kluwer, 2001. p. 1014-1015. Proceedings of 14º International Plant Nutrition Colloquium| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| Registros recuperados : 24 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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