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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
20/02/2002 |
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Data da última atualização: |
20/02/2002 |
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Autoria: |
BARBOSA, Z.; BAHIA, V. G.; PAULA, M. B. de. |
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Título: |
Atuacao da biota do solo na formacao e estabilizacao de agregados e na estruturacao dos solos, influenciando o controle da erosao. |
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Ano de publicação: |
1998 |
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Fonte/Imprenta: |
Informe Agropecuario, Belo Horizonte, v. 19, n. 191, p. 59-65, 1998. |
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Idioma: |
Português |
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Conteúdo: |
Os agregados do solo resultam do processo de arranjamento de suas particulas solidas dos espacos porosos associados, e variam gandemente em forma e tamanho. Bastante complexo, o processo de agregacao (estruturacao) e influenciado pela acao de componentes abioticos e bioticos, que podem, cada um destes, em determinadas situacoes, contribuir com ele em menor ou maior importancia. Destacam-se como componentes abioticos o tamanho das particulas, o regime hidrico, a presenca de oxidos e sesquioxidos hidratados de Fe e Al, a quantidade e tipos de argilas, a presenca de silica, bem como a presenca de compostos organicos como as substancias humicas e os polissacarideos; enquanto que, no componente biotico, o destaque ocorre para a pedobiota (animais e microorganismos) e vegetacao (raizes). |
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Palavras-Chave: |
Biota do solo. |
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Thesagro: |
Erosão. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01330naa a2200169 a 4500
001 1280928
005 2002-02-20
008 1998 bl uuuu u00u1 u #d
100 1 $aBARBOSA, Z.
245 $aAtuacao da biota do solo na formacao e estabilizacao de agregados e na estruturacao dos solos, influenciando o controle da erosao.
260 $c1998
520 $aOs agregados do solo resultam do processo de arranjamento de suas particulas solidas dos espacos porosos associados, e variam gandemente em forma e tamanho. Bastante complexo, o processo de agregacao (estruturacao) e influenciado pela acao de componentes abioticos e bioticos, que podem, cada um destes, em determinadas situacoes, contribuir com ele em menor ou maior importancia. Destacam-se como componentes abioticos o tamanho das particulas, o regime hidrico, a presenca de oxidos e sesquioxidos hidratados de Fe e Al, a quantidade e tipos de argilas, a presenca de silica, bem como a presenca de compostos organicos como as substancias humicas e os polissacarideos; enquanto que, no componente biotico, o destaque ocorre para a pedobiota (animais e microorganismos) e vegetacao (raizes).
650 $aErosão
653 $aBiota do solo
700 1 $aBAHIA, V. G.
700 1 $aPAULA, M. B. de
773 $tInforme Agropecuario, Belo Horizonte$gv. 19, n. 191, p. 59-65, 1998.
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Registro original: |
Embrapa Florestas (CNPF) |
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Registro Completo
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
01/09/2021 |
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Data da última atualização: |
01/09/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
REIS, N. S.; FERREIRA, I. C.; MAZOCOO, L. A.; SOUZA, A. C. B.; PINHO, G. A. S.; FONSECA NETO, A. M. da; MALAQUIAS, J. V.; SILVA, F. A. M. da; MULLER, A. G.; MARTINS, C. F.; BALBINO, L. C.; MCMANUS, C. M. |
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Afiliação: |
NATANI S. REIS; ISABEL CRISTINA FERREIRA, CPAC; LUCAS A. MAZOCCO; ANA CLARA B. SOUZA; GABRIEL A. S. PINHO; ALVARO MORAES DA FONSECA NETO, CPAC; JUACI VITORIA MALAQUIAS, CPAC; FERNANDO ANTONIO MACENA DA SILVA, CPAC; ARTUR GUSTAVO MULLER, CPAC; CARLOS FREDERICO MARTINS, CPAC; LUIZ CARLOS BALBINO, CPAC; CONCEPTA M. MCMANUS. |
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Título: |
Shade Modifies Behavioral and Physiological Responses of Low to Medium Production Dairy Cows at Pasture in an Integrated Crop-Livestock-Forest System. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Animals, v. 11, n. 2411, 2021. |
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Páginas: |
12 p. |
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DOI: |
https://doi.org/10.3390/ani11082411 |
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Idioma: |
Português |
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Conteúdo: |
Abstract: Under conditions of high temperature, humidity, and incidence of solar radiation, dairy cows use behavioral changes as a strategy to decrease the metabolic heat production at pasture. The objective of this study was to evaluate the behavioral and physiological responses of Gyr and Girolando (5/8 Holstein 3/8 Gyr, and 1 2 Holstein 1 2 Gyr) dairy cows submitted to environments with and without shade. The experiment was conducted at Embrapa Cerrados (Technology Center for Dairy Zebu breeds?CTZL), Brasilia, Distrito Federal?Brazil, with 48 Gyr and Girolando cows total in the lactation group, with low to medium milk production, in full sun or shade with Eucalyptus urograndis (267 plants/ha−1). The physiological and behavioral characteristics evaluated were panting score, superficial temperature, and time spent grazing, ruminating, and lying down. Other traits included skin and coat thickness, hair diameter, density and length, and predominant coat color. In addition, body measurements, such as body length, the height of withers, chest circumference, and shin circumference, were measured. Shaded cows had 34% longer rumination times than cows in full sun (p = 0.01). With a temperature-humidity index ranging from 79 to 83, the rumination time was 1.7 times higher in cows under shade (p = 0.01) during a 24-h period of observation. There were no significant differences in the grazing time between the environments, but lying time was 23% longer in cows under the sun (p = 0.01). The panting score was not influenced by the environment (p = 0.17). Girolando cows had a 35% higher panting score than Gyr cows (p = 0.01) regardless of the environment. The panting score increased two and a half times during the afternoon compared with the morning (p = 0.01). The surface and rectal core temperatures had significant differences between treatments and time of the day. Body measurements were not different between cows in both environments, but there was a difference between breeds. The use of trees in pastures with a silvopastoral system for dairy zebu cows is indicated to improve grazing behavior, as well as time spent ruminating and lying down. MenosAbstract: Under conditions of high temperature, humidity, and incidence of solar radiation, dairy cows use behavioral changes as a strategy to decrease the metabolic heat production at pasture. The objective of this study was to evaluate the behavioral and physiological responses of Gyr and Girolando (5/8 Holstein 3/8 Gyr, and 1 2 Holstein 1 2 Gyr) dairy cows submitted to environments with and without shade. The experiment was conducted at Embrapa Cerrados (Technology Center for Dairy Zebu breeds?CTZL), Brasilia, Distrito Federal?Brazil, with 48 Gyr and Girolando cows total in the lactation group, with low to medium milk production, in full sun or shade with Eucalyptus urograndis (267 plants/ha−1). The physiological and behavioral characteristics evaluated were panting score, superficial temperature, and time spent grazing, ruminating, and lying down. Other traits included skin and coat thickness, hair diameter, density and length, and predominant coat color. In addition, body measurements, such as body length, the height of withers, chest circumference, and shin circumference, were measured. Shaded cows had 34% longer rumination times than cows in full sun (p = 0.01). With a temperature-humidity index ranging from 79 to 83, the rumination time was 1.7 times higher in cows under shade (p = 0.01) during a 24-h period of observation. There were no significant differences in the grazing time between the environments, but lying time was 23% longer in cows under the sun (p ... Mostrar Tudo |
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Palavras-Chave: |
Característica morfológica; Comportamento ingestivo; Estresse por calor; Pasto. |
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Thesagro: |
Laticínio. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/225652/1/Shade-modifies-behavioral-and-physiological-responses-Isabel.pdf
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Marc: |
LEADER 03207naa a2200337 a 4500
001 2133992
005 2021-09-01
008 2021 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.3390/ani11082411$2DOI
100 1 $aREIS, N. S.
245 $aShade Modifies Behavioral and Physiological Responses of Low to Medium Production Dairy Cows at Pasture in an Integrated Crop-Livestock-Forest System.$h[electronic resource]
260 $c2021
300 $a12 p.
520 $aAbstract: Under conditions of high temperature, humidity, and incidence of solar radiation, dairy cows use behavioral changes as a strategy to decrease the metabolic heat production at pasture. The objective of this study was to evaluate the behavioral and physiological responses of Gyr and Girolando (5/8 Holstein 3/8 Gyr, and 1 2 Holstein 1 2 Gyr) dairy cows submitted to environments with and without shade. The experiment was conducted at Embrapa Cerrados (Technology Center for Dairy Zebu breeds?CTZL), Brasilia, Distrito Federal?Brazil, with 48 Gyr and Girolando cows total in the lactation group, with low to medium milk production, in full sun or shade with Eucalyptus urograndis (267 plants/ha−1). The physiological and behavioral characteristics evaluated were panting score, superficial temperature, and time spent grazing, ruminating, and lying down. Other traits included skin and coat thickness, hair diameter, density and length, and predominant coat color. In addition, body measurements, such as body length, the height of withers, chest circumference, and shin circumference, were measured. Shaded cows had 34% longer rumination times than cows in full sun (p = 0.01). With a temperature-humidity index ranging from 79 to 83, the rumination time was 1.7 times higher in cows under shade (p = 0.01) during a 24-h period of observation. There were no significant differences in the grazing time between the environments, but lying time was 23% longer in cows under the sun (p = 0.01). The panting score was not influenced by the environment (p = 0.17). Girolando cows had a 35% higher panting score than Gyr cows (p = 0.01) regardless of the environment. The panting score increased two and a half times during the afternoon compared with the morning (p = 0.01). The surface and rectal core temperatures had significant differences between treatments and time of the day. Body measurements were not different between cows in both environments, but there was a difference between breeds. The use of trees in pastures with a silvopastoral system for dairy zebu cows is indicated to improve grazing behavior, as well as time spent ruminating and lying down.
650 $aLaticínio
653 $aCaracterística morfológica
653 $aComportamento ingestivo
653 $aEstresse por calor
653 $aPasto
700 1 $aFERREIRA, I. C.
700 1 $aMAZOCOO, L. A.
700 1 $aSOUZA, A. C. B.
700 1 $aPINHO, G. A. S.
700 1 $aFONSECA NETO, A. M. da
700 1 $aMALAQUIAS, J. V.
700 1 $aSILVA, F. A. M. da
700 1 $aMULLER, A. G.
700 1 $aMARTINS, C. F.
700 1 $aBALBINO, L. C.
700 1 $aMCMANUS, C. M.
773 $tAnimals$gv. 11, n. 2411, 2021.
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