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Registro Completo |
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Biblioteca(s): |
Embrapa Meio-Norte; Embrapa Roraima. |
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Data corrente: |
05/04/2023 |
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Data da última atualização: |
05/04/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
COSTA, N. de L.; MAGALHAES, J. A.; BENDAHAN, A. B.; RODRIGUES, B. H. N.; SANTOS, F. J. de S. |
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Afiliação: |
NEWTON DE LUCENA COSTA, CPAF-RR; JOAO AVELAR MAGALHAES, CPAMN; AMAURY BURLAMAQUI BENDAHAN, CPAF-RR; BRAZ HENRIQUE NUNES RODRIGUES, CPAMN; FRANCISCO JOSE DE SEIXAS SANTOS, CPAMN. |
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Título: |
Effect of phosphate fertilization on forage productivity and morphogenesis of axonopus purpusii pastures in Roraima's savannas. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
RECIMA21, v. 4, n. 3, 2023. |
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Idioma: |
Inglês |
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Conteúdo: |
The effect of phosphate fertilization (0, 30, 60 and 120 kg of P2O5 ha-1) on forage production and morphogenetic and structural characteristics of Axonopus aureus was evaluated under natural field conditions in the savannas of Roraima. Phosphate fertilization positively and significantly (P<0.05) affected green dry matter (GDM) production, absolute growth rate (AGR), number of tillers plant-1, number of leaves tiller-1 (NLT), average leaf size (ALS), leaf tiller area (LTA), appearance rates (LAR), expansion (LER) and leaf senescence rates. The maximum yields of GDM, AGR, LAR, LER, NLT, LTA and ALS were obtained with the application of 110.4; 108.5; 54.1; 83.5; 96.6; 59.8 and 90.6 kg of P2O5 ha-1, respectively. The efficiency of P utilization was inversely proportional to the P doses applied. |
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Palavras-Chave: |
Green dry matter. |
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Thesagro: |
Matéria Seca. |
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Thesaurus Nal: |
Leaves; Senescence (aging); Tillering. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1153028/1/Recima21-EFFECT-OF-PHOSPHATE-FERTILIZATION-ON-FORAGE-PRODUCTIVITY-AND-MORPHOGENESIS-OF-AXONOPUS-PURPUSII-PASTURES-IN-RORAIMAS-SAVANNAS.pdf
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Marc: |
LEADER 01491naa a2200229 a 4500
001 2153028
005 2023-04-05
008 2023 bl uuuu u00u1 u #d
100 1 $aCOSTA, N. de L.
245 $aEffect of phosphate fertilization on forage productivity and morphogenesis of axonopus purpusii pastures in Roraima's savannas.$h[electronic resource]
260 $c2023
520 $aThe effect of phosphate fertilization (0, 30, 60 and 120 kg of P2O5 ha-1) on forage production and morphogenetic and structural characteristics of Axonopus aureus was evaluated under natural field conditions in the savannas of Roraima. Phosphate fertilization positively and significantly (P<0.05) affected green dry matter (GDM) production, absolute growth rate (AGR), number of tillers plant-1, number of leaves tiller-1 (NLT), average leaf size (ALS), leaf tiller area (LTA), appearance rates (LAR), expansion (LER) and leaf senescence rates. The maximum yields of GDM, AGR, LAR, LER, NLT, LTA and ALS were obtained with the application of 110.4; 108.5; 54.1; 83.5; 96.6; 59.8 and 90.6 kg of P2O5 ha-1, respectively. The efficiency of P utilization was inversely proportional to the P doses applied.
650 $aLeaves
650 $aSenescence (aging)
650 $aTillering
650 $aMatéria Seca
653 $aGreen dry matter
700 1 $aMAGALHAES, J. A.
700 1 $aBENDAHAN, A. B.
700 1 $aRODRIGUES, B. H. N.
700 1 $aSANTOS, F. J. de S.
773 $tRECIMA21$gv. 4, n. 3, 2023.
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Registro original: |
Embrapa Roraima (CPAF-RR) |
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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. |
Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
05/02/2020 |
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Data da última atualização: |
08/11/2022 |
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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: |
FERREIRA, J. N.; LENNOX, G. D.; BERENGUER, E.; FERREIRA, M. do S. G.; SCHWARTZ, G.; MELO, L. de O.; REIS JUNIOR, D. N.; NASCIMENTO, R. O.; FERREIRA, F. N.; ESPIRITO-SANTO, F.; SMITH, C. C.; BARLOW, J. |
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Afiliação: |
JOICE NUNES FERREIRA, CPATU; GARETH D. LENNOX, Lancaster University; ERIKA BERENGUER, Lancaster University / University of Oxford; MARIA DO SOCORRO GONCALVES FERREIRA, CPATU; GUSTAVO SCHWARTZ, CPATU; LIA DE OLIVEIRA MELO, UFOPA; DENILSON N. REIS JUNIOR, UFRA; RODRIGO O. NASCIMENTO, UFPA; FABRICIO NASCIMENTO FERREIRA, CPATU; FERNANDO ESPIRITO-SANTO, University of Leicester; CHARLOTTE C. SMITH, Lancaster University; JOS BARLOW, Lancaster University / UFLA. |
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Título: |
Assessing the growth and climate sensitivity of secondary forests in highly deforested Amazonian landscapes. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Ecology, v. 101, n. 3, e02954, Mar. 2020. |
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DOI: |
10.1002/ecy.2954 |
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Idioma: |
Inglês |
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Conteúdo: |
Tropical forests hold 30% of Earth’s terrestrial carbon and at least 60% of its terrestrial biodiversity, but forest loss and degradation are jeopardizing these ecosystems. Although the regrowth of secondary forests has the potential to offset some of the losses of carbon and biodiversity, it remains unclear if secondary regeneration will be affected by climate changes such as higher temperatures and more frequent extreme droughts. We used a data set of 10 repeated forest inventories spanning two decades (1999–2017) to investigate carbon and tree species recovery and how climate and landscape context influence carbon dynamics in an older secondary forest located in one of the oldest post-Columbian agricultural frontiers in the Brazilian Amazon. Carbon accumulation averaged 1.08 Mg·ha−1·yr−1, and species richness was effectively constant over the studied period. Moreover, we provide evidence that secondary forests are vulnerable to drought stress: Carbon balance and growth rates were lower in drier periods. This contrasts with drought responses in primary forests, where changes in carbon dynamics are driven by increased stem mortality. These results highlight an important climate change–vegetation feedback, whereby the increasing dry-season lengths being observed across parts of Amazonia may reduce the effectiveness of secondary forests in sequestering carbon and mitigating climate change. In addition, the current rate of forest regrowth in this region was low compared with previous pan-tropical and Amazonian assessments—our secondary forests reached just 41.1% of the average carbon and 56% of the tree diversity in the nearest primary forests—suggesting that these areas are unlikely to return to their original levels on politically meaningful time scales. MenosTropical forests hold 30% of Earth’s terrestrial carbon and at least 60% of its terrestrial biodiversity, but forest loss and degradation are jeopardizing these ecosystems. Although the regrowth of secondary forests has the potential to offset some of the losses of carbon and biodiversity, it remains unclear if secondary regeneration will be affected by climate changes such as higher temperatures and more frequent extreme droughts. We used a data set of 10 repeated forest inventories spanning two decades (1999–2017) to investigate carbon and tree species recovery and how climate and landscape context influence carbon dynamics in an older secondary forest located in one of the oldest post-Columbian agricultural frontiers in the Brazilian Amazon. Carbon accumulation averaged 1.08 Mg·ha−1·yr−1, and species richness was effectively constant over the studied period. Moreover, we provide evidence that secondary forests are vulnerable to drought stress: Carbon balance and growth rates were lower in drier periods. This contrasts with drought responses in primary forests, where changes in carbon dynamics are driven by increased stem mortality. These results highlight an important climate change–vegetation feedback, whereby the increasing dry-season lengths being observed across parts of Amazonia may reduce the effectiveness of secondary forests in sequestering carbon and mitigating climate change. In addition, the current rate of forest regrowth in this region was low compared with p... Mostrar Tudo |
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Thesagro: |
Biodiversidade; Carbono; Floresta Secundaria; Mudança Climática. |
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Thesaurus NAL: |
Amazonia. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 02738naa a2200325 a 4500
001 2119859
005 2022-11-08
008 2020 bl uuuu u00u1 u #d
024 7 $a10.1002/ecy.2954$2DOI
100 1 $aFERREIRA, J. N.
245 $aAssessing the growth and climate sensitivity of secondary forests in highly deforested Amazonian landscapes.$h[electronic resource]
260 $c2020
520 $aTropical forests hold 30% of Earth’s terrestrial carbon and at least 60% of its terrestrial biodiversity, but forest loss and degradation are jeopardizing these ecosystems. Although the regrowth of secondary forests has the potential to offset some of the losses of carbon and biodiversity, it remains unclear if secondary regeneration will be affected by climate changes such as higher temperatures and more frequent extreme droughts. We used a data set of 10 repeated forest inventories spanning two decades (1999–2017) to investigate carbon and tree species recovery and how climate and landscape context influence carbon dynamics in an older secondary forest located in one of the oldest post-Columbian agricultural frontiers in the Brazilian Amazon. Carbon accumulation averaged 1.08 Mg·ha−1·yr−1, and species richness was effectively constant over the studied period. Moreover, we provide evidence that secondary forests are vulnerable to drought stress: Carbon balance and growth rates were lower in drier periods. This contrasts with drought responses in primary forests, where changes in carbon dynamics are driven by increased stem mortality. These results highlight an important climate change–vegetation feedback, whereby the increasing dry-season lengths being observed across parts of Amazonia may reduce the effectiveness of secondary forests in sequestering carbon and mitigating climate change. In addition, the current rate of forest regrowth in this region was low compared with previous pan-tropical and Amazonian assessments—our secondary forests reached just 41.1% of the average carbon and 56% of the tree diversity in the nearest primary forests—suggesting that these areas are unlikely to return to their original levels on politically meaningful time scales.
650 $aAmazonia
650 $aBiodiversidade
650 $aCarbono
650 $aFloresta Secundaria
650 $aMudança Climática
700 1 $aLENNOX, G. D.
700 1 $aBERENGUER, E.
700 1 $aFERREIRA, M. do S. G.
700 1 $aSCHWARTZ, G.
700 1 $aMELO, L. de O.
700 1 $aREIS JUNIOR, D. N.
700 1 $aNASCIMENTO, R. O.
700 1 $aFERREIRA, F. N.
700 1 $aESPIRITO-SANTO, F.
700 1 $aSMITH, C. C.
700 1 $aBARLOW, J.
773 $tEcology$gv. 101, n. 3, e02954, Mar. 2020.
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