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Registro Completo |
Biblioteca(s): |
Embrapa Clima Temperado. |
Data corrente: |
20/06/2016 |
Data da última atualização: |
28/09/2017 |
Tipo da produção científica: |
Circular Técnica |
Autoria: |
EMYGDIO, B. M.; SILVA, C. B. da; STÖHLIRCK, L.; FACCHINELLO, P. H. K. |
Afiliação: |
BEATRIZ MARTI EMYGDIO, CPACT; CICERO BEZERRA DA SILVA, CPATSA; Luciano Stöhlirck; Paulo Henrique K. Facchinello. |
Título: |
Avaliação de Cultivares de Sorgo Granífero em Solos Hidromórficos no RS - Safra 2013/2014. |
Ano de publicação: |
2016 |
Fonte/Imprenta: |
Pelotas: Embrapa Clima Temperado, 2016. |
Páginas: |
4 p. |
Série: |
(Embrapa Clima Temperado, Circular Técnica, 169.) |
Idioma: |
Português |
Thesagro: |
Sorgo. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/144557/1/Circular-169.pdf
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Marc: |
LEADER 00553nam a2200169 a 4500 001 2047445 005 2017-09-28 008 2016 bl uuuu u0uu1 u #d 100 1 $aEMYGDIO, B. M. 245 $aAvaliação de Cultivares de Sorgo Granífero em Solos Hidromórficos no RS - Safra 2013/2014.$h[electronic resource] 260 $aPelotas: Embrapa Clima Temperado$c2016 300 $a4 p. 490 $a(Embrapa Clima Temperado, Circular Técnica, 169.) 650 $aSorgo 700 1 $aSILVA, C. B. da 700 1 $aSTÖHLIRCK, L. 700 1 $aFACCHINELLO, P. H. K.
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Embrapa Clima Temperado (CPACT) |
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Registro Completo
Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
21/06/2001 |
Data da última atualização: |
06/12/2022 |
Autoria: |
GEHRING, C.; DENICH, M.; KANASHIRO, M.; VLEK, P. L. G. |
Afiliação: |
CHRISTOPH GEHRING, University of Göttingen; MANFRED DENICH, University of Göttingen; MILTON KANASHIRO, CPATU; PAUL L. G. VLEK, University of Göttingen. |
Título: |
Response of secondary vegetation in Eastern Amazonia to relaxed nutrient availability constraints. |
Ano de publicação: |
1999 |
Fonte/Imprenta: |
Biogeochemistry, v. 45, n. 3, p. 223-241, 1999. |
Descrição Física: |
il. |
DOI: |
10.1023/A:1006138815453 |
Idioma: |
Inglês |
Conteúdo: |
This study evaluated the effect of nutrient application on the regrowth dynamics of secondary fallow vegetation in an intensely exploited shifting cultivation area in the eastern Amazon region of Brazil. The importance of N, P, K, Ca, Mg, S and a mixture of micronutrients was tested in a minus-one-trial by comparison with a full complement of nutrients and unfertilized control plots. Fertilizers were applied three times during the experiment and their effects were monitored over 2 1/2 years. Prior to the second fertilization, one third of each experimental plot was cleared of the vegetation cover and planted in maize, prior to the third fertilizer application these subplots were planted in sorghum. Biomass of maize and sorghum were used to indicate nutrient constraints and fertilizing effects due to the different treatments. Both crops were limited by P- and N-availability, with greater responses to P. The initial fertilization did not affect the biomass accumulation of the secondary vegetation during the first 15 months, but two additional applications significantly increased biomass in the complete fertilizer treatment compared to the unfertilized control. Biomass accumulation was primarily P-limited, N-limitation was apparent but not significant. The remaining nutrients did not affect plant growth. Fertilization favored production of nutrient-rich leaves. Application of readily available nutrients gave grasses a competitive edge over slower reacting woody vegetation. Fertilization also caused significant shifts in the contribution of woody species to biomass accumulation, as could be demonstrated for two prominent pioneer tree species. Growth response to fertilization as well as the primary limiting nutrient varied among seven dominant species monitored in the secondary vegetation. We conclude that growth of tropical secondary vegetation can be nutrient limited and it might respond significantly to additional nutrients by increasing biomass production. MenosThis study evaluated the effect of nutrient application on the regrowth dynamics of secondary fallow vegetation in an intensely exploited shifting cultivation area in the eastern Amazon region of Brazil. The importance of N, P, K, Ca, Mg, S and a mixture of micronutrients was tested in a minus-one-trial by comparison with a full complement of nutrients and unfertilized control plots. Fertilizers were applied three times during the experiment and their effects were monitored over 2 1/2 years. Prior to the second fertilization, one third of each experimental plot was cleared of the vegetation cover and planted in maize, prior to the third fertilizer application these subplots were planted in sorghum. Biomass of maize and sorghum were used to indicate nutrient constraints and fertilizing effects due to the different treatments. Both crops were limited by P- and N-availability, with greater responses to P. The initial fertilization did not affect the biomass accumulation of the secondary vegetation during the first 15 months, but two additional applications significantly increased biomass in the complete fertilizer treatment compared to the unfertilized control. Biomass accumulation was primarily P-limited, N-limitation was apparent but not significant. The remaining nutrients did not affect plant growth. Fertilization favored production of nutrient-rich leaves. Application of readily available nutrients gave grasses a competitive edge over slower reacting woody vegetation. Fert... Mostrar Tudo |
Palavras-Chave: |
Regeneration. |
Thesagro: |
Adubação; Biomassa; Floresta Secundaria; Regeneração. |
Thesaurus NAL: |
biomass; fertilizer application; secondary forests. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02776naa a2200277 a 4500 001 1400480 005 2022-12-06 008 1999 bl uuuu u00u1 u #d 024 7 $a10.1023/A:1006138815453$2DOI 100 1 $aGEHRING, C. 245 $aResponse of secondary vegetation in Eastern Amazonia to relaxed nutrient availability constraints.$h[electronic resource] 260 $c1999 300 $cil. 520 $aThis study evaluated the effect of nutrient application on the regrowth dynamics of secondary fallow vegetation in an intensely exploited shifting cultivation area in the eastern Amazon region of Brazil. The importance of N, P, K, Ca, Mg, S and a mixture of micronutrients was tested in a minus-one-trial by comparison with a full complement of nutrients and unfertilized control plots. Fertilizers were applied three times during the experiment and their effects were monitored over 2 1/2 years. Prior to the second fertilization, one third of each experimental plot was cleared of the vegetation cover and planted in maize, prior to the third fertilizer application these subplots were planted in sorghum. Biomass of maize and sorghum were used to indicate nutrient constraints and fertilizing effects due to the different treatments. Both crops were limited by P- and N-availability, with greater responses to P. The initial fertilization did not affect the biomass accumulation of the secondary vegetation during the first 15 months, but two additional applications significantly increased biomass in the complete fertilizer treatment compared to the unfertilized control. Biomass accumulation was primarily P-limited, N-limitation was apparent but not significant. The remaining nutrients did not affect plant growth. Fertilization favored production of nutrient-rich leaves. Application of readily available nutrients gave grasses a competitive edge over slower reacting woody vegetation. Fertilization also caused significant shifts in the contribution of woody species to biomass accumulation, as could be demonstrated for two prominent pioneer tree species. Growth response to fertilization as well as the primary limiting nutrient varied among seven dominant species monitored in the secondary vegetation. We conclude that growth of tropical secondary vegetation can be nutrient limited and it might respond significantly to additional nutrients by increasing biomass production. 650 $abiomass 650 $afertilizer application 650 $asecondary forests 650 $aAdubação 650 $aBiomassa 650 $aFloresta Secundaria 650 $aRegeneração 653 $aRegeneration 700 1 $aDENICH, M. 700 1 $aKANASHIRO, M. 700 1 $aVLEK, P. L. G. 773 $tBiogeochemistry$gv. 45, n. 3, p. 223-241, 1999.
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