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Registro Completo |
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Biblioteca(s): |
Embrapa Rondônia. |
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Data corrente: |
09/01/2003 |
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Data da última atualização: |
09/01/2003 |
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Autoria: |
FERREIRA, S. J. F.; LUIZÃO, F. J.; MELLO-IVO, W.; ROSS, S. M.; BIOT, Y. |
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Título: |
Propriedades físicas do solo após extração seletiva de madeira na Amazônia Central. |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
Acta Amazônica, Manaus, v. 32, n. 3, jul./set. 2002. |
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Páginas: |
p. 449-466 |
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Idioma: |
Português |
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Conteúdo: |
Variáveis físicas do solo foram investigadas em parcelas de florestas de terra firme submetidas à extração seletiva de madeira na Amazônia central. Foram obtidas curvas de retenção de água no solo, juntamente com medidas de água disponível no solo às plantas, densidade do solo e porosidade total. Medidas de temperatura do solo foram realizadas por mais de 13 meses, considerando-se seis tratamentos: controle, centro de clareira, borda da clareira, borda da floresta, remanescente, floresta remanescente e trilha do trator. Medidas de condutividade hidráulica de solo saturado foram feitas na floresta e em clareiras, sem distinguir os tratamentos. O solo revelou baixa capacidade de armazenar água disponível: apenas 11 a 18% da água pode estar disponível às plantas, num perfil de 1 m de profundidade. A temperatura das camadas superiores do solo foi influenciada pela extração seletiva de madeira: nas clareiras abertas, a luz chega com mais intensidade no solo, proporcionando temperaturas mais elevadas no centro e nas bordas das clareiras do que no controle e na floresta remanescente. |
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Palavras-Chave: |
Conditividade hidráulica do solo; Curva de retenção de água; Extração seletiva da madeira. |
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Thesagro: |
Física do Solo; Temperatura do Solo. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01834naa a2200241 a 4500
001 1703642
005 2003-01-09
008 2002 bl uuuu u00u1 u #d
100 1 $aFERREIRA, S. J. F.
245 $aPropriedades físicas do solo após extração seletiva de madeira na Amazônia Central.
260 $c2002
300 $ap. 449-466
520 $aVariáveis físicas do solo foram investigadas em parcelas de florestas de terra firme submetidas à extração seletiva de madeira na Amazônia central. Foram obtidas curvas de retenção de água no solo, juntamente com medidas de água disponível no solo às plantas, densidade do solo e porosidade total. Medidas de temperatura do solo foram realizadas por mais de 13 meses, considerando-se seis tratamentos: controle, centro de clareira, borda da clareira, borda da floresta, remanescente, floresta remanescente e trilha do trator. Medidas de condutividade hidráulica de solo saturado foram feitas na floresta e em clareiras, sem distinguir os tratamentos. O solo revelou baixa capacidade de armazenar água disponível: apenas 11 a 18% da água pode estar disponível às plantas, num perfil de 1 m de profundidade. A temperatura das camadas superiores do solo foi influenciada pela extração seletiva de madeira: nas clareiras abertas, a luz chega com mais intensidade no solo, proporcionando temperaturas mais elevadas no centro e nas bordas das clareiras do que no controle e na floresta remanescente.
650 $aFísica do Solo
650 $aTemperatura do Solo
653 $aConditividade hidráulica do solo
653 $aCurva de retenção de água
653 $aExtração seletiva da madeira
700 1 $aLUIZÃO, F. J.
700 1 $aMELLO-IVO, W.
700 1 $aROSS, S. M.
700 1 $aBIOT, Y.
773 $tActa Amazônica, Manaus$gv. 32, n. 3, jul./set. 2002.
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Registro original: |
Embrapa Rondônia (CPAF-RO) |
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Registro Completo
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Biblioteca(s): |
Embrapa Uva e Vinho. |
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Data corrente: |
12/07/2022 |
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Data da última atualização: |
14/07/2022 |
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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: |
PAULA, B. V. de; VITTO, B. B.; SETE, P. B.; TRAPP, T.; ZALAMENA, J.; MELO, G. W. B. de; BALDI, E.; TOSELLI, M.; ROZANE, D. E.; BRUNETTO, G. |
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Afiliação: |
BETANIA VAHL DE PAULA, Universidade Federal de Santa Maria; BEATRIZ BATICINI VITTO, Universidade Federal de Santa Catarina; PAULA BEATRIZ SETE, Universidade Federal de Santa Catarina; TALITA TRAPP, Universidade Federal de Santa Catarina; JOVANI ZALAMENA, Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul; GEORGE WELLINGTON BASTOS DE MELO, CNPUV; ELENA BALDI, University of Bologna; MORENO TOSELLI, University of Bologna; DANILO EDUARDO ROZANE, Universidade do Estado de São Paulo; GUSTAVO BRUNETTO, Universidade Federal de Santa Maria. |
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Título: |
Annual and residual urea nitrogen contribution to the nutrition of peach trees (Prunus persica L.) grown under subtropical climate. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Scientia Horticulturae, v. 284, e-110099, 2021. |
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DOI: |
https://doi.org/10.1016/J.SCIENTA.2021.110099 |
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Idioma: |
Inglês |
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Conteúdo: |
Nitrogen (N) fertilizers such as urea are applied to peach orchards worldwide whenever the soil cannot meet plants? N demand. However, the actual nutritional contribution of different N supply modes applied to peach crops, or the contribution of residual N in the subsequent cycle, is yet to be fully known. The current study aims to assess the annual and residual urea N contribution to the nutrition of peach trees grown under subtropical climate. Forty kilograms of N per hectare supplied as enriched urea (3.0 at. % 15N), were applied to peach in full production at a single rate (100 % at budding) or split in two rates (50 % at budding and 50 % at flowering). Total 15N and N concentrations in the application year and in the year after treatments were assessed in peach leaves throughout the cycle, in fruits (pulp and stone) at harvest and in stratified soil samples. Total 15N, N concentrations and total dry mass were measured in annual and perennial tree organs in the year after treatment application. Peach trees evidenced higher N deriving from fertilizer (NDFF) in leaves and fruits (pulp and stone) in the year N was applied to the soil, as well as in the following year when N application was split into two rates. The highest NDFF amounts recorded in the year following N application were observed in leaves and fruits (annual organs) and thick roots (perennial organ), mainly when N was splitted. However, mainly in the year following its application, due to the small residual N, the N found in trees derived from sources other than N fertilizer; this justifies annual N applications, whenever necessary. The cultivation of cover crops and the preservation of organic matter could help N peach nutrition that seems to take advantage more of residual N in soil than on fertilizers. MenosNitrogen (N) fertilizers such as urea are applied to peach orchards worldwide whenever the soil cannot meet plants? N demand. However, the actual nutritional contribution of different N supply modes applied to peach crops, or the contribution of residual N in the subsequent cycle, is yet to be fully known. The current study aims to assess the annual and residual urea N contribution to the nutrition of peach trees grown under subtropical climate. Forty kilograms of N per hectare supplied as enriched urea (3.0 at. % 15N), were applied to peach in full production at a single rate (100 % at budding) or split in two rates (50 % at budding and 50 % at flowering). Total 15N and N concentrations in the application year and in the year after treatments were assessed in peach leaves throughout the cycle, in fruits (pulp and stone) at harvest and in stratified soil samples. Total 15N, N concentrations and total dry mass were measured in annual and perennial tree organs in the year after treatment application. Peach trees evidenced higher N deriving from fertilizer (NDFF) in leaves and fruits (pulp and stone) in the year N was applied to the soil, as well as in the following year when N application was split into two rates. The highest NDFF amounts recorded in the year following N application were observed in leaves and fruits (annual organs) and thick roots (perennial organ), mainly when N was splitted. However, mainly in the year following its application, due to the small residual N,... Mostrar Tudo |
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Palavras-Chave: |
15N isotope; Fruit farming; N distribution; N fertilization; Orchard. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1144667/1/Paula-2021-110099.pdf
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Marc: |
LEADER 02698naa a2200301 a 4500
001 2144667
005 2022-07-14
008 2021 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/J.SCIENTA.2021.110099$2DOI
100 1 $aPAULA, B. V. de
245 $aAnnual and residual urea nitrogen contribution to the nutrition of peach trees (Prunus persica L.) grown under subtropical climate.$h[electronic resource]
260 $c2021
520 $aNitrogen (N) fertilizers such as urea are applied to peach orchards worldwide whenever the soil cannot meet plants? N demand. However, the actual nutritional contribution of different N supply modes applied to peach crops, or the contribution of residual N in the subsequent cycle, is yet to be fully known. The current study aims to assess the annual and residual urea N contribution to the nutrition of peach trees grown under subtropical climate. Forty kilograms of N per hectare supplied as enriched urea (3.0 at. % 15N), were applied to peach in full production at a single rate (100 % at budding) or split in two rates (50 % at budding and 50 % at flowering). Total 15N and N concentrations in the application year and in the year after treatments were assessed in peach leaves throughout the cycle, in fruits (pulp and stone) at harvest and in stratified soil samples. Total 15N, N concentrations and total dry mass were measured in annual and perennial tree organs in the year after treatment application. Peach trees evidenced higher N deriving from fertilizer (NDFF) in leaves and fruits (pulp and stone) in the year N was applied to the soil, as well as in the following year when N application was split into two rates. The highest NDFF amounts recorded in the year following N application were observed in leaves and fruits (annual organs) and thick roots (perennial organ), mainly when N was splitted. However, mainly in the year following its application, due to the small residual N, the N found in trees derived from sources other than N fertilizer; this justifies annual N applications, whenever necessary. The cultivation of cover crops and the preservation of organic matter could help N peach nutrition that seems to take advantage more of residual N in soil than on fertilizers.
653 $a15N isotope
653 $aFruit farming
653 $aN distribution
653 $aN fertilization
653 $aOrchard
700 1 $aVITTO, B. B.
700 1 $aSETE, P. B.
700 1 $aTRAPP, T.
700 1 $aZALAMENA, J.
700 1 $aMELO, G. W. B. de
700 1 $aBALDI, E.
700 1 $aTOSELLI, M.
700 1 $aROZANE, D. E.
700 1 $aBRUNETTO, G.
773 $tScientia Horticulturae$gv. 284, e-110099, 2021.
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