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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
04/08/2004 |
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Data da última atualização: |
04/08/2004 |
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Autoria: |
JANTALIA, C. P.; SANTOS, H. P. dos; DENARDIN, J. E.; KOCHHANN, R.; ALVES, B. J. R.; URQUIAGA, S.; BODDEY, R. M. |
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Título: |
Influência de rotações de culturas no estoque de carbono e nitrogênio do solo sob plantio direto e preparo convencional. |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
Agronomia, Seropédica/RJ, v. 37, n. 2, p. 91-97, 2003. |
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Idioma: |
Português |
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Notas: |
Influence of crop rotations in soil carbon and nitrogen stocks under no tillage and conventional tillage. |
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Conteúdo: |
O objetivo deste estudo foi determinar o efeito de diferentes rotações de culturas sob plantio direto e preparo convencional no estoque de carbono (C) e nitrogênio (N) do solo em dois experimentos de longa duração conduzidos em um Latossolo Vermelho, em Passo Fundo, Rio Grande do Sul. Foram retiradas amostras em diferentes intervalos de profundidade até 100 cm do perfil. Nestes intervalos, foram determinados a densidade de C e N do solo. Os resultados demonstraram que: 1) No experimento 1, após 13 anos não houve diferença nos estoques de C e N nos dois sistemas de manejo do solo sob a rotação em seqüência de soja e trigo; 2) Nas rotações que incluíram a leguminosa ervilhada como adubação verde de inverno, os estoques de C e N foram maiores em plantio direto do que no preparo convencional. As rotações Trigo/ Soja-Ervilhaca/ Milho e Trigo/ Soja-Aveia/ Soja-Ervilhaca/ Milho do experimento 1 apresentaram em média um balanço positivo de 17 e 1,6 Mg há-¹ nos estoques de C e N respectivamente, enquanto no experimento 2 estes valores foram de 18 e 1,1 Mg há-¹; 3) em plantio direto, estas rotações de culturas também apresentaram teores de C e N significativamente maiores entre 30 e 85 cm de profundidade, em relação ao preparo convencional. Os resultados demonstraram que o maior acúmulo de C e N no solo sob plantio direto pode ser atribuíra à maior disponibilidade de N no sistema, que promove maior ingresso de resíduos culturais. Este fato explica a importância da presença de uma leguminosa utilizada como adubação verde de inverno a cada dois ou três anos na rotação de culturas.
The objective of this study was to determine in two long term experiments the effect of different crop rotations under no tillage (NT) and conventional tillage (CT) on the organic C balance in a clay Oxisol soil type at Passo Fundo, Rio Grande do Sul. The soil samples were taken from 0-5, 5-10, 10-15, 15-20, 20-30, 30-40, 40-55, 55-70, 70-85 and 85-100 cm depth, and analyzed for bulk density, C and N content. The results showed that: 1) In experiment 1, after 13 years there was no difference in soil C stock between tillage treatments (0-100 cm depth) under a continuous sequence of wheat (winter) and soybean (summer); 2) In the rotations in which _ vetch (Viccia villosa), was planted as a winter green-manure crop, C and N stocks were found respectively to be approximately 17 and 1,6 Mg ha-¹ ¹ higher under NT between 30 and 85 depth. The results found in these two independents experiments, suggested that the N2 fixation input from the leguminous green manure (vetch) in the cropping system was the principal factor responsible for the observed C accumulation in the soil under zero tillage. MenosO objetivo deste estudo foi determinar o efeito de diferentes rotações de culturas sob plantio direto e preparo convencional no estoque de carbono (C) e nitrogênio (N) do solo em dois experimentos de longa duração conduzidos em um Latossolo Vermelho, em Passo Fundo, Rio Grande do Sul. Foram retiradas amostras em diferentes intervalos de profundidade até 100 cm do perfil. Nestes intervalos, foram determinados a densidade de C e N do solo. Os resultados demonstraram que: 1) No experimento 1, após 13 anos não houve diferença nos estoques de C e N nos dois sistemas de manejo do solo sob a rotação em seqüência de soja e trigo; 2) Nas rotações que incluíram a leguminosa ervilhada como adubação verde de inverno, os estoques de C e N foram maiores em plantio direto do que no preparo convencional. As rotações Trigo/ Soja-Ervilhaca/ Milho e Trigo/ Soja-Aveia/ Soja-Ervilhaca/ Milho do experimento 1 apresentaram em média um balanço positivo de 17 e 1,6 Mg há-¹ nos estoques de C e N respectivamente, enquanto no experimento 2 estes valores foram de 18 e 1,1 Mg há-¹; 3) em plantio direto, estas rotações de culturas também apresentaram teores de C e N significativamente maiores entre 30 e 85 cm de profundidade, em relação ao preparo convencional. Os resultados demonstraram que o maior acúmulo de C e N no solo sob plantio direto pode ser atribuíra à maior disponibilidade de N no sistema, que promove maior ingresso de resíduos culturais. Este fato explica a importância da presença de uma legu... Mostrar Tudo |
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Palavras-Chave: |
C; Densidade do solo; Direct sowing; N; Rotational cropping; Zero tillage. |
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Thesagro: |
Carbono; Leguminosa; Manejo do Solo; Matéria Orgânica; Nitrogênio; Plantio Direto; Rotação de Cultura. |
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Thesaurus Nal: |
carbon; legumes; nitrogen; soil density; soil management. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03966naa a2200421 a 4500
001 1624742
005 2004-08-04
008 2003 bl --- 0-- u #d
100 1 $aJANTALIA, C. P.
245 $aInfluência de rotações de culturas no estoque de carbono e nitrogênio do solo sob plantio direto e preparo convencional.
260 $c2003
500 $aInfluence of crop rotations in soil carbon and nitrogen stocks under no tillage and conventional tillage.
520 $aO objetivo deste estudo foi determinar o efeito de diferentes rotações de culturas sob plantio direto e preparo convencional no estoque de carbono (C) e nitrogênio (N) do solo em dois experimentos de longa duração conduzidos em um Latossolo Vermelho, em Passo Fundo, Rio Grande do Sul. Foram retiradas amostras em diferentes intervalos de profundidade até 100 cm do perfil. Nestes intervalos, foram determinados a densidade de C e N do solo. Os resultados demonstraram que: 1) No experimento 1, após 13 anos não houve diferença nos estoques de C e N nos dois sistemas de manejo do solo sob a rotação em seqüência de soja e trigo; 2) Nas rotações que incluíram a leguminosa ervilhada como adubação verde de inverno, os estoques de C e N foram maiores em plantio direto do que no preparo convencional. As rotações Trigo/ Soja-Ervilhaca/ Milho e Trigo/ Soja-Aveia/ Soja-Ervilhaca/ Milho do experimento 1 apresentaram em média um balanço positivo de 17 e 1,6 Mg há-¹ nos estoques de C e N respectivamente, enquanto no experimento 2 estes valores foram de 18 e 1,1 Mg há-¹; 3) em plantio direto, estas rotações de culturas também apresentaram teores de C e N significativamente maiores entre 30 e 85 cm de profundidade, em relação ao preparo convencional. Os resultados demonstraram que o maior acúmulo de C e N no solo sob plantio direto pode ser atribuíra à maior disponibilidade de N no sistema, que promove maior ingresso de resíduos culturais. Este fato explica a importância da presença de uma leguminosa utilizada como adubação verde de inverno a cada dois ou três anos na rotação de culturas. The objective of this study was to determine in two long term experiments the effect of different crop rotations under no tillage (NT) and conventional tillage (CT) on the organic C balance in a clay Oxisol soil type at Passo Fundo, Rio Grande do Sul. The soil samples were taken from 0-5, 5-10, 10-15, 15-20, 20-30, 30-40, 40-55, 55-70, 70-85 and 85-100 cm depth, and analyzed for bulk density, C and N content. The results showed that: 1) In experiment 1, after 13 years there was no difference in soil C stock between tillage treatments (0-100 cm depth) under a continuous sequence of wheat (winter) and soybean (summer); 2) In the rotations in which _ vetch (Viccia villosa), was planted as a winter green-manure crop, C and N stocks were found respectively to be approximately 17 and 1,6 Mg ha-¹ ¹ higher under NT between 30 and 85 depth. The results found in these two independents experiments, suggested that the N2 fixation input from the leguminous green manure (vetch) in the cropping system was the principal factor responsible for the observed C accumulation in the soil under zero tillage.
650 $acarbon
650 $alegumes
650 $anitrogen
650 $asoil density
650 $asoil management
650 $aCarbono
650 $aLeguminosa
650 $aManejo do Solo
650 $aMatéria Orgânica
650 $aNitrogênio
650 $aPlantio Direto
650 $aRotação de Cultura
653 $aC
653 $aDensidade do solo
653 $aDirect sowing
653 $aN
653 $aRotational cropping
653 $aZero tillage
700 1 $aSANTOS, H. P. dos
700 1 $aDENARDIN, J. E.
700 1 $aKOCHHANN, R.
700 1 $aALVES, B. J. R.
700 1 $aURQUIAGA, S.
700 1 $aBODDEY, R. M.
773 $tAgronomia, Seropédica/RJ$gv. 37, n. 2, p. 91-97, 2003.
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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Leite. Para informações adicionais entre em contato com cnpgl.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
14/06/2017 |
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Data da última atualização: |
30/11/2017 |
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Autoria: |
SIQUEIRA, L. G. B. |
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Afiliação: |
LUIZ GUSTAVO BRUNO SIQUEIRA, CNPGL. |
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Título: |
Developmental programming of the bovine embryo by in vitro fertilization and the maternal embryokine colony-stimulating factor 2. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
2017. |
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Páginas: |
181 f. |
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Idioma: |
Inglês |
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Notas: |
Tese (Doutorado em Biologia Celular e Molecular Animal) - University of Florida, Gainesville, FL. |
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Conteúdo: |
Abstract: Abnormak fetuses, neonates, and adult offspring derived by assisted reproductive technologies (ART) have been reported in humans and mice and have been associated with invreased likelihood of certain adult diseases. Matternally-derived molecules that are missing furing culture may lead to these abnormalities. In this study, a series of experiments evaluated the effects of in vitro embryo-production (IVP) on bovine embryonic, fetal, and postnatal development. We also took advantage of the controlled environment during culture to test whether a maternal embryokine, colony-stimulating factor 2 (CSF2), could embryo and fetal programming if apllied from days 5 to 7 of development. First, a retrospective cohort study was conducted to determine the pulative effects of ART on postnatal mortality, growth, and adult performance of dairy cattle. Offspring derived by IVP with reverse-sorted semen were at increased risk of mortality in the first 6 months of age, had altered birth weight and growth trajectory until puberty, and a slightly decrease in milk, fat, and protein production during their first lactation as adult cows. In the secod study, it was found that culture of embryos in vitro until day 7 of development was associated with altered fetal development at day 86 of gestation. CSF2 not abolish adverse effects of culture on morphometric features of the fetus, but did alter gene expression in liver, and muscle. Finally, it was tested whether CSF2 would affect embryonic development differently for female than male mebryos. CSF2 affected embryonic development to the blastocyst stage in females, but not males. Sexual dimorphism was observed in gene expression of morulae, in which level of expression of ~35% of the 92 genes examined dependend on sex. The effect of CSF2 was modified by sex in five genes, including developmentally important ones (e.g. NANOG and POU5F1). In conclusion, 1) procedures associated with IVP with reverse-sorted semen results in alterations of embryonic programming and consequences that persist postnatally and impact adult productive performance; 2) CSF2 can act as a developmental programming agent, but this embryokine alone was not able to abolish adverse effects of IVP on fetal development; and 3) responses of abryos to CSF2 depends upon embryo sex. MenosAbstract: Abnormak fetuses, neonates, and adult offspring derived by assisted reproductive technologies (ART) have been reported in humans and mice and have been associated with invreased likelihood of certain adult diseases. Matternally-derived molecules that are missing furing culture may lead to these abnormalities. In this study, a series of experiments evaluated the effects of in vitro embryo-production (IVP) on bovine embryonic, fetal, and postnatal development. We also took advantage of the controlled environment during culture to test whether a maternal embryokine, colony-stimulating factor 2 (CSF2), could embryo and fetal programming if apllied from days 5 to 7 of development. First, a retrospective cohort study was conducted to determine the pulative effects of ART on postnatal mortality, growth, and adult performance of dairy cattle. Offspring derived by IVP with reverse-sorted semen were at increased risk of mortality in the first 6 months of age, had altered birth weight and growth trajectory until puberty, and a slightly decrease in milk, fat, and protein production during their first lactation as adult cows. In the secod study, it was found that culture of embryos in vitro until day 7 of development was associated with altered fetal development at day 86 of gestation. CSF2 not abolish adverse effects of culture on morphometric features of the fetus, but did alter gene expression in liver, and muscle. Finally, it was tested whether CSF2 would affect embryonic d... Mostrar Tudo |
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Palavras-Chave: |
Colony-stimulating factor 2; Production in vitro. |
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Categoria do assunto: |
G Melhoramento Genético |
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Marc: |
LEADER 02880nam a2200157 a 4500
001 2070908
005 2017-11-30
008 2017 bl uuuu m 00u1 u #d
100 1 $aSIQUEIRA, L. G. B.
245 $aDevelopmental programming of the bovine embryo by in vitro fertilization and the maternal embryokine colony-stimulating factor 2.
260 $a2017.$c2017
300 $a181 f.
500 $aTese (Doutorado em Biologia Celular e Molecular Animal) - University of Florida, Gainesville, FL.
520 $aAbstract: Abnormak fetuses, neonates, and adult offspring derived by assisted reproductive technologies (ART) have been reported in humans and mice and have been associated with invreased likelihood of certain adult diseases. Matternally-derived molecules that are missing furing culture may lead to these abnormalities. In this study, a series of experiments evaluated the effects of in vitro embryo-production (IVP) on bovine embryonic, fetal, and postnatal development. We also took advantage of the controlled environment during culture to test whether a maternal embryokine, colony-stimulating factor 2 (CSF2), could embryo and fetal programming if apllied from days 5 to 7 of development. First, a retrospective cohort study was conducted to determine the pulative effects of ART on postnatal mortality, growth, and adult performance of dairy cattle. Offspring derived by IVP with reverse-sorted semen were at increased risk of mortality in the first 6 months of age, had altered birth weight and growth trajectory until puberty, and a slightly decrease in milk, fat, and protein production during their first lactation as adult cows. In the secod study, it was found that culture of embryos in vitro until day 7 of development was associated with altered fetal development at day 86 of gestation. CSF2 not abolish adverse effects of culture on morphometric features of the fetus, but did alter gene expression in liver, and muscle. Finally, it was tested whether CSF2 would affect embryonic development differently for female than male mebryos. CSF2 affected embryonic development to the blastocyst stage in females, but not males. Sexual dimorphism was observed in gene expression of morulae, in which level of expression of ~35% of the 92 genes examined dependend on sex. The effect of CSF2 was modified by sex in five genes, including developmentally important ones (e.g. NANOG and POU5F1). In conclusion, 1) procedures associated with IVP with reverse-sorted semen results in alterations of embryonic programming and consequences that persist postnatally and impact adult productive performance; 2) CSF2 can act as a developmental programming agent, but this embryokine alone was not able to abolish adverse effects of IVP on fetal development; and 3) responses of abryos to CSF2 depends upon embryo sex.
653 $aColony-stimulating factor 2
653 $aProduction in vitro
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