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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
02/04/2002 |
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Data da última atualização: |
21/07/2006 |
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Autoria: |
CAMPOS, J. C. C. |
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Título: |
Análise de crescimento e produção em plantações desbastadas. |
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Ano de publicação: |
1980 |
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Fonte/Imprenta: |
Revista Árvore, Viçosa, v. 4, n. 2, p. 157-169, jul./dez. 1980. |
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ISSN: |
0100-6762 |
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Idioma: |
Português |
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Conteúdo: |
Foi conduzido um estudo visando a avaliar a efetividade da aplicacao de algumas tecnicas de analise de crescimento e producao. Foram usados dados de parcelas permanentes de plantacoes intensivamente desbastadas de Pinus patula, localizadas no Sul de Minas Gerais. O emprego do modelo nao-linear de Chapman-Richards para estimar a producao total (com a introducao do indice de local ocomo variavel independente no modelo basico ) e o desenvolvimento de tabela de producao de densidade variavel foram as contribuicoes do estudo para que se pudesse conhecer o desenvolvimento dessa especie. As estimativas obtidas nao indicaram nenhum bias, quando comparadas com os valores observados. Por limitacao de frequencia de dados, nao foi feito teste de validacao com dados independentes. Melhor interpretacao do efeito do desbaste em uso na area, seria obtida se se comparassem as estimativas de crescimento e producao aqui obtidas com as referentes a plantacoes nao desbastadas. |
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Categoria do assunto: |
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Marc: |
LEADER 01353naa a2200133 a 4500
001 1285307
005 2006-07-21
008 1980 bl uuuu u00u1 u #d
022 $a0100-6762
100 1 $aCAMPOS, J. C. C.
245 $aAnálise de crescimento e produção em plantações desbastadas.
260 $c1980
520 $aFoi conduzido um estudo visando a avaliar a efetividade da aplicacao de algumas tecnicas de analise de crescimento e producao. Foram usados dados de parcelas permanentes de plantacoes intensivamente desbastadas de Pinus patula, localizadas no Sul de Minas Gerais. O emprego do modelo nao-linear de Chapman-Richards para estimar a producao total (com a introducao do indice de local ocomo variavel independente no modelo basico ) e o desenvolvimento de tabela de producao de densidade variavel foram as contribuicoes do estudo para que se pudesse conhecer o desenvolvimento dessa especie. As estimativas obtidas nao indicaram nenhum bias, quando comparadas com os valores observados. Por limitacao de frequencia de dados, nao foi feito teste de validacao com dados independentes. Melhor interpretacao do efeito do desbaste em uso na area, seria obtida se se comparassem as estimativas de crescimento e producao aqui obtidas com as referentes a plantacoes nao desbastadas.
773 $tRevista Árvore, Viçosa$gv. 4, n. 2, p. 157-169, jul./dez. 1980.
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Embrapa Florestas (CNPF) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Pesca e Aquicultura. Para informações adicionais entre em contato com cnpaf.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Pesca e Aquicultura. |
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Data corrente: |
10/01/2023 |
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Data da última atualização: |
13/02/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 3 |
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Autoria: |
PIEROZAN JUNIOR, C.; FAVARIN, J. L.; BAPTISTELLA, J. L. C.; ALMEIDA, R. E. M. de; OLIVEIRA, S. M. de; LAGO, B. C.; TEZOTTO, T. |
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Afiliação: |
CLOVIS PIEROZAN JUNIOR, FEDERAL INSTITUTE OF EDUCATION SCIENCE AND TECHNOLOGY OF PARANÁ; JOSÉ LAÉRCIO FAVARIN, ESALQ; JOÃO LEONARDO CORTE BAPTISTELLA, ESALQ; RODRIGO ESTEVAM MUNHOZ DE ALMEIDA, CNPASA; SILAS MACIEL DE OLIVEIRA, UNIVERSIDADE ESTADUAL DE MARINGÁ, PR; BRUNO COCCO LAGO, ESALQ; TIAGO TEZOTTO, ESALQ. |
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Título: |
Controlled release urea increases soybean yield without compromising symbiotic nitrogen fixation. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Experimental Agriculture, v. 59, e1, p. 1-13, 2023. |
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ISSN: |
0014-4797 |
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DOI: |
https://doi.org/10.1017/S0014479722000540 |
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Idioma: |
Inglês |
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Conteúdo: |
In Brazil, high-yield soybean [Glycine Max (L). Merrill] - corn (Zea mays L.) double cropping system might be nitrogen (N)-limited and additional N fertilization can be beneficial. Early application of N in soybean reduces the symbiotic N fixation (SNF) efficiency and/or establishment. One alternative to avoid SNF impairment is to apply N between the beginning pod (R3) and seed-fill (R5) stages through the use of controlled release fertilizers. In this study, N was applied at 50 kg ha-1 as common urea (CU) or controlled release urea (CRU) with different lag periods until N release starts (30 days, 60 days, or 1:1 mix of both lag times) in a randomized complete blocks design with six treatments and four replicates under tropical and subtropical conditions. CU was applied after soybean emergence (VE) or at the beginning pod (R3), and CRU only at VE. Using urea labeled with 15N isotope, we analyzed the N source used by soybean (fertilizer, soil, or SNF) and SNF parameters. On average, CRU ? 30 days, CRU - 1:1 mix (30 + 60 days) and CU applied at the R3 stage increased grain yield by 9.2% (354 kg ha-1) compared to the control. N derived from all fertilizer treatment were almost 35 kg N ha-1, a high N recovery efficiency of 68%. The SNF was not impaired by CU and CRU and accounted for 71% (220 kg N ha-1) of total N uptake. In the conditions of the experiments, fertilization of 50 kg N ha-1 as CRU was shown to be effective to supply N in late soybean demand (R3 stage), increasing yield without damaging the SNF process in high-yield environments. MenosIn Brazil, high-yield soybean [Glycine Max (L). Merrill] - corn (Zea mays L.) double cropping system might be nitrogen (N)-limited and additional N fertilization can be beneficial. Early application of N in soybean reduces the symbiotic N fixation (SNF) efficiency and/or establishment. One alternative to avoid SNF impairment is to apply N between the beginning pod (R3) and seed-fill (R5) stages through the use of controlled release fertilizers. In this study, N was applied at 50 kg ha-1 as common urea (CU) or controlled release urea (CRU) with different lag periods until N release starts (30 days, 60 days, or 1:1 mix of both lag times) in a randomized complete blocks design with six treatments and four replicates under tropical and subtropical conditions. CU was applied after soybean emergence (VE) or at the beginning pod (R3), and CRU only at VE. Using urea labeled with 15N isotope, we analyzed the N source used by soybean (fertilizer, soil, or SNF) and SNF parameters. On average, CRU ? 30 days, CRU - 1:1 mix (30 + 60 days) and CU applied at the R3 stage increased grain yield by 9.2% (354 kg ha-1) compared to the control. N derived from all fertilizer treatment were almost 35 kg N ha-1, a high N recovery efficiency of 68%. The SNF was not impaired by CU and CRU and accounted for 71% (220 kg N ha-1) of total N uptake. In the conditions of the experiments, fertilization of 50 kg N ha-1 as CRU was shown to be effective to supply N in late soybean demand (R3 stage), increasing ... Mostrar Tudo |
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Thesagro: |
Fixação de Nitrogênio; Glycine Max; Soja. |
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Thesaurus NAL: |
Fertilizers; Nitrogen; Nitrogen fixation; Plant nutrition; Soybeans; Ureides. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 02510naa a2200325 a 4500
001 2150852
005 2023-02-13
008 2023 bl uuuu u00u1 u #d
022 $a0014-4797
024 7 $ahttps://doi.org/10.1017/S0014479722000540$2DOI
100 1 $aPIEROZAN JUNIOR, C.
245 $aControlled release urea increases soybean yield without compromising symbiotic nitrogen fixation.$h[electronic resource]
260 $c2023
520 $aIn Brazil, high-yield soybean [Glycine Max (L). Merrill] - corn (Zea mays L.) double cropping system might be nitrogen (N)-limited and additional N fertilization can be beneficial. Early application of N in soybean reduces the symbiotic N fixation (SNF) efficiency and/or establishment. One alternative to avoid SNF impairment is to apply N between the beginning pod (R3) and seed-fill (R5) stages through the use of controlled release fertilizers. In this study, N was applied at 50 kg ha-1 as common urea (CU) or controlled release urea (CRU) with different lag periods until N release starts (30 days, 60 days, or 1:1 mix of both lag times) in a randomized complete blocks design with six treatments and four replicates under tropical and subtropical conditions. CU was applied after soybean emergence (VE) or at the beginning pod (R3), and CRU only at VE. Using urea labeled with 15N isotope, we analyzed the N source used by soybean (fertilizer, soil, or SNF) and SNF parameters. On average, CRU ? 30 days, CRU - 1:1 mix (30 + 60 days) and CU applied at the R3 stage increased grain yield by 9.2% (354 kg ha-1) compared to the control. N derived from all fertilizer treatment were almost 35 kg N ha-1, a high N recovery efficiency of 68%. The SNF was not impaired by CU and CRU and accounted for 71% (220 kg N ha-1) of total N uptake. In the conditions of the experiments, fertilization of 50 kg N ha-1 as CRU was shown to be effective to supply N in late soybean demand (R3 stage), increasing yield without damaging the SNF process in high-yield environments.
650 $aFertilizers
650 $aNitrogen
650 $aNitrogen fixation
650 $aPlant nutrition
650 $aSoybeans
650 $aUreides
650 $aFixação de Nitrogênio
650 $aGlycine Max
650 $aSoja
700 1 $aFAVARIN, J. L.
700 1 $aBAPTISTELLA, J. L. C.
700 1 $aALMEIDA, R. E. M. de
700 1 $aOLIVEIRA, S. M. de
700 1 $aLAGO, B. C.
700 1 $aTEZOTTO, T.
773 $tExperimental Agriculture$gv. 59, e1, p. 1-13, 2023.
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