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| Registros recuperados : 10 | |
| 5. |  | KANDA, K.; TAKAHASHI, M.; MIRANDA, C. H. B. Nitrogen cycling agropastoral systems In: KANNO, T.; MACEDO, M.C.M., ed. JIRCAS / EMBRAPA gado de corte international joint workshop on agropastoral system in South America. [Tsukuba]: JIRCAS, 2001. p.75-84. (JIRCAS Working Report, 19). EMBRAPA-CNPGC and JIRCAS joint International Workshop on Agropastoral System in South America, held in Campo Grande, MS, Brazil, 1999.| Biblioteca(s): Embrapa Cerrados. |
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| 6. | | MIRANDA, C. H. B.; MACEDO, M. C. M.; KANDA, K. Crop residues in agropastoral systems. In: KANNO, T.; MACEDO, M.C.M., ed. JIRCAS / EMBRAPA gado de corte international joint workshop on agropastoral system in South America. [Tsukuba]: JIRCAS, 2001. p.43-49. (JIRCAS Working Report, 19). EMBRAPA-CNPGC and JIRCAS joint International Workshop on Agropastoral System in South America, held in Campo Grande, MS, Brazil, 1999.| Biblioteca(s): Embrapa Cerrados. |
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| 9. | | MIRANDA, C. H. B.; MACEDO, M. C. M.; KANDA, K.; NAKAMURA, T. Soil organic residues accumulation in agro-pastoral systems in the cerrados of Brazil. In: SUENAGA, K.; OSHIBE, A.; TANIGUHI, T. (Ed.). Development of sustainable agro-pastoral systems in the subtropical zone of Brazil. Tsukuba: JIRCAS, 2004. p. 29-33. (JIRCAS. Working Report, 36). CNPGC. Proceedings of the Workshop on the results and prospects of comprehensive studies on the development of sustainable agro-pastoral systems in the subtropical zone of Brazil, 2003.| Biblioteca(s): Embrapa Gado de Corte. |
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| 10. | | KANNO, T.; MACEDO, M. C. M.; NAKAMURA, T.; YOSHIMURA, Y.; FUKUDA, E.; KANDA, K.; NAKANISHI, N.; SAITO, M.; ANDO, Y. Grassland management technology for sustainable agro-pastoral systems in the subtropical zone of Brazil. In: SUENAGA, K.; OSHIBE, A.; TANIGUHI, T. (Ed.). Development of sustainable agro-pastoral systems in the subtropical zone of Brazil. Tsukuba: JIRCAS, 2004. p. 5-13. (JIRCAS. Working Report, 36). CNPGC. Proceedings of the Workshop on the results and prospects of comprehensive studies on the development of sustainable agro-pastoral systems in the subtropical zone of Brazil, 2003.| Biblioteca(s): Embrapa Gado de Corte. |
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| Registros recuperados : 10 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Corte. Para informações adicionais entre em contato com cnpgc.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Gado de Corte. |
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Data corrente: |
16/06/2004 |
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Data da última atualização: |
16/06/2004 |
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Autoria: |
KANDA, K.; MIRANDA, C. H. B.; TAKAHASHI. M.; MACEDO, M. C. M. |
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Afiliação: |
JIRCAS (Owashi, Japão). |
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Título: |
Nitrogen dynamics in agro-pastoral system of Brazil. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
In: SUENAGA, K.; OSHIBE, A.; TANIGUHI, T. (Ed.). Development of sustainable agro-pastoral systems in the subtropical zone of Brazil. Tsukuba: JIRCAS, 2004. |
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Páginas: |
p. 19-23. |
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Série: |
(JIRCAS. Working Report, 36). |
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Idioma: |
Inglês |
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Notas: |
CNPGC. Proceedings of the Workshop on the results and prospects of comprehensive studies on the development of sustainable agro-pastoral systems in the subtropical zone of Brazil, 2003.
|
|
Conteúdo: |
In 1999, soil samples were taken from a field experiment on agro-pastoral system initiated in 1993 in a Purple Red Latosol in Campo Grande, MS, Brazil, from a) a field with continuous soybean cropping; b) a field with soybean cultivation after 4 years of use as a grassland (rotational soybean); c)continuous grassland; d) grassland planted after 4 years of soybean cultivation (rotational grassland), e) degraded grassland; and f) original Cerrados forest. Total C and N contents and mineralization potentials were determined. For C and N mineralization studies we developed a new anaerobic incubatio method. Results obtained indicated that replacement of the Cerrados forest by a pure grassland and exploitation without proper cattle management and fertilizer application led to a decrease in both total C and N contents. Continuous cultivation of soybean on such a degrated grassland area induced a further decrease, which could be alleviated by rotation with a grassland. On the other hand, soil C and N mineralization potentials were not appreciably affected, indicatingthat grassland degradation did not affect these parameters. Further, we studied nitrogen flow under this agro-pastoral system. A large negative N balance was estimated in the soybean fields, whereas the N balance in the grasslands was slightly negative. |
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Palavras-Chave: |
Agropastoral systems; Brasil; Brazilian savannas; Integração agricultura pecuária. |
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Thesagro: |
Cerrado; Nitrogênio. |
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Thesaurus NAL: |
Brazil; nitrogen. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02384naa a2200289 a 4500
001 1325526
005 2004-06-16
008 2004 bl uuuu u00u1 u #d
100 1 $aKANDA, K.
245 $aNitrogen dynamics in agro-pastoral system of Brazil.
260 $c2004
300 $ap. 19-23.
490 $a(JIRCAS. Working Report, 36).
500 $aCNPGC. Proceedings of the Workshop on the results and prospects of comprehensive studies on the development of sustainable agro-pastoral systems in the subtropical zone of Brazil, 2003.
520 $aIn 1999, soil samples were taken from a field experiment on agro-pastoral system initiated in 1993 in a Purple Red Latosol in Campo Grande, MS, Brazil, from a) a field with continuous soybean cropping; b) a field with soybean cultivation after 4 years of use as a grassland (rotational soybean); c)continuous grassland; d) grassland planted after 4 years of soybean cultivation (rotational grassland), e) degraded grassland; and f) original Cerrados forest. Total C and N contents and mineralization potentials were determined. For C and N mineralization studies we developed a new anaerobic incubatio method. Results obtained indicated that replacement of the Cerrados forest by a pure grassland and exploitation without proper cattle management and fertilizer application led to a decrease in both total C and N contents. Continuous cultivation of soybean on such a degrated grassland area induced a further decrease, which could be alleviated by rotation with a grassland. On the other hand, soil C and N mineralization potentials were not appreciably affected, indicatingthat grassland degradation did not affect these parameters. Further, we studied nitrogen flow under this agro-pastoral system. A large negative N balance was estimated in the soybean fields, whereas the N balance in the grasslands was slightly negative.
650 $aBrazil
650 $anitrogen
650 $aCerrado
650 $aNitrogênio
653 $aAgropastoral systems
653 $aBrasil
653 $aBrazilian savannas
653 $aIntegração agricultura pecuária
700 1 $aMIRANDA, C. H. B.
700 1 $aTAKAHASHI. M.
700 1 $aMACEDO, M. C. M.
773 $tIn: SUENAGA, K.; OSHIBE, A.; TANIGUHI, T. (Ed.). Development of sustainable agro-pastoral systems in the subtropical zone of Brazil. Tsukuba: JIRCAS, 2004.
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