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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Leite; Embrapa Unidades Centrais. |
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Data corrente: |
11/09/2001 |
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Data da última atualização: |
17/08/2022 |
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Autoria: |
AROEIRA, L. J. M.; LOPES, F. C. F.; SOARES, J. P. G.; DERESZ, F.; VERNEQUE, R. S.; ARCURI, P. B.; MATOS, L. L. de. |
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Afiliação: |
CNPGL. |
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Título: |
Daily intake of lactating crossbred cows grazing elephant grass rotationally. |
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Ano de publicação: |
2001 |
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Fonte/Imprenta: |
Pesquisa Agropecuaria Brasileira, v. 36, n. 6, p. 911-917, 2001. |
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Idioma: |
Inglês |
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Conteúdo: |
ABSTRACT - The goal of this trial was to estimate the total dry matter (TDMI) and daily pasture dry matter intakes (PDMI) by lactating crossbred Holstein Zebu cows grazing elephant grass (Pennisetum purpureum Schum.) paddocks submitted to different rest periods. Three groups of 24 cows were used during two years. The paddocks were grazed during three days at the stocking rate of 4.5 cows/ha. Treatments consisted of resting periods of 30 days without concentrate and resting periods of 30, 37.5 and 45 days with 2 kg/cow/day of 20.6% crude protein concentrate. From July to October, pasture was supplemented with chopped sugarcane plus 1% urea. Total daily dry matter intake was estimated using the extrusa in vitro dry matter digestibility and the fecal output with chromium oxide. Regardless of the treatment the estimated average TDMI was 2.7, 2.9 and 2.9±0.03% and the mean PDMI was 1.9, 2.1 and 2.1±0.03% of body weight in the first, second and third grazing day, respectively (P<0.05). Only during the summer pasture quality was the same whichever the grazing day. Sugarcane effectively replaced grazing pasture, mainly in the first day when pasture dry matter intake was lowest. RESUMO - O objetivo deste trabalho foi o de estimar o consumo total e o diário de matéria seca do pasto, de vacas mestiças Holandês Zebu, em piquetes de capim-elefante (Pennisetum purpureum Schum.). Três grupos de 24 vacas foram usados em piquetes (4,5 vacas/ha), pastejados por três dias e submetidos a diferentes períodos de descanso durante dois anos. Os tratamentos consistiram de descansos de 30 dias sem concentrado e 30, 37,5 e 45 dias com a suplementação de 2 kg de concentrado (20,6% de proteína bruta). De julho a outubro, as vacas receberam, como suplementação, cana-deaçúcar mais 1% de uréia. O consumo total de matéria seca foi estimado a partir da digestibilidade in vitro da matéria seca da extrusa e da produção fecal obtida com óxido crômico. Independentemente do tratamento, o consumo total foi 2,7; 2,9 e 2.9±0,03%, e o consumo de matéria seca do pasto foi de 1,9; 2,1 e 2,1±0,03% do peso vivo (p<0,05), respectivamente, no primeiro, segundo e terceiro dia de ocupação do piquete. Somente no verão, o consumo do pasto foi semelhante nos três dias de pastejo. A mistura cana-de-açúcar e uréia substituiu o pasto, principalmente no primeiro dia de pastejo, ocasião em que o consumo do pasto era mais baixo. MenosABSTRACT - The goal of this trial was to estimate the total dry matter (TDMI) and daily pasture dry matter intakes (PDMI) by lactating crossbred Holstein Zebu cows grazing elephant grass (Pennisetum purpureum Schum.) paddocks submitted to different rest periods. Three groups of 24 cows were used during two years. The paddocks were grazed during three days at the stocking rate of 4.5 cows/ha. Treatments consisted of resting periods of 30 days without concentrate and resting periods of 30, 37.5 and 45 days with 2 kg/cow/day of 20.6% crude protein concentrate. From July to October, pasture was supplemented with chopped sugarcane plus 1% urea. Total daily dry matter intake was estimated using the extrusa in vitro dry matter digestibility and the fecal output with chromium oxide. Regardless of the treatment the estimated average TDMI was 2.7, 2.9 and 2.9±0.03% and the mean PDMI was 1.9, 2.1 and 2.1±0.03% of body weight in the first, second and third grazing day, respectively (P<0.05). Only during the summer pasture quality was the same whichever the grazing day. Sugarcane effectively replaced grazing pasture, mainly in the first day when pasture dry matter intake was lowest. RESUMO - O objetivo deste trabalho foi o de estimar o consumo total e o diário de matéria seca do pasto, de vacas mestiças Holandês Zebu, em piquetes de capim-elefante (Pennisetum purpureum Schum.). Três grupos de 24 vacas foram usados em piquetes (4,5 vacas/ha), pastejados por três dias e submetidos a di... Mostrar Tudo |
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Palavras-Chave: |
Conteudo da materia seca; Feed grasses; Gramineas forrageiras. |
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Thesagro: |
Digestibilidade; Extrusão; Pennisetum Purpureum. |
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Thesaurus Nal: |
digestibility; dry matter content; extrusion. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE/19145/1/pab0911.pdf
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Marc: |
LEADER 03305naa a2200301 a 4500
001 1594532
005 2022-08-17
008 2001 bl uuuu u00u1 u #d
100 1 $aAROEIRA, L. J. M.
245 $aDaily intake of lactating crossbred cows grazing elephant grass rotationally.
260 $c2001
520 $aABSTRACT - The goal of this trial was to estimate the total dry matter (TDMI) and daily pasture dry matter intakes (PDMI) by lactating crossbred Holstein Zebu cows grazing elephant grass (Pennisetum purpureum Schum.) paddocks submitted to different rest periods. Three groups of 24 cows were used during two years. The paddocks were grazed during three days at the stocking rate of 4.5 cows/ha. Treatments consisted of resting periods of 30 days without concentrate and resting periods of 30, 37.5 and 45 days with 2 kg/cow/day of 20.6% crude protein concentrate. From July to October, pasture was supplemented with chopped sugarcane plus 1% urea. Total daily dry matter intake was estimated using the extrusa in vitro dry matter digestibility and the fecal output with chromium oxide. Regardless of the treatment the estimated average TDMI was 2.7, 2.9 and 2.9±0.03% and the mean PDMI was 1.9, 2.1 and 2.1±0.03% of body weight in the first, second and third grazing day, respectively (P<0.05). Only during the summer pasture quality was the same whichever the grazing day. Sugarcane effectively replaced grazing pasture, mainly in the first day when pasture dry matter intake was lowest. RESUMO - O objetivo deste trabalho foi o de estimar o consumo total e o diário de matéria seca do pasto, de vacas mestiças Holandês Zebu, em piquetes de capim-elefante (Pennisetum purpureum Schum.). Três grupos de 24 vacas foram usados em piquetes (4,5 vacas/ha), pastejados por três dias e submetidos a diferentes períodos de descanso durante dois anos. Os tratamentos consistiram de descansos de 30 dias sem concentrado e 30, 37,5 e 45 dias com a suplementação de 2 kg de concentrado (20,6% de proteína bruta). De julho a outubro, as vacas receberam, como suplementação, cana-deaçúcar mais 1% de uréia. O consumo total de matéria seca foi estimado a partir da digestibilidade in vitro da matéria seca da extrusa e da produção fecal obtida com óxido crômico. Independentemente do tratamento, o consumo total foi 2,7; 2,9 e 2.9±0,03%, e o consumo de matéria seca do pasto foi de 1,9; 2,1 e 2,1±0,03% do peso vivo (p<0,05), respectivamente, no primeiro, segundo e terceiro dia de ocupação do piquete. Somente no verão, o consumo do pasto foi semelhante nos três dias de pastejo. A mistura cana-de-açúcar e uréia substituiu o pasto, principalmente no primeiro dia de pastejo, ocasião em que o consumo do pasto era mais baixo.
650 $adigestibility
650 $adry matter content
650 $aextrusion
650 $aDigestibilidade
650 $aExtrusão
650 $aPennisetum Purpureum
653 $aConteudo da materia seca
653 $aFeed grasses
653 $aGramineas forrageiras
700 1 $aLOPES, F. C. F.
700 1 $aSOARES, J. P. G.
700 1 $aDERESZ, F.
700 1 $aVERNEQUE, R. S.
700 1 $aARCURI, P. B.
700 1 $aMATOS, L. L. de
773 $tPesquisa Agropecuaria Brasileira$gv. 36, n. 6, p. 911-917, 2001.
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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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Registro Completo
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Biblioteca(s): |
Embrapa Alimentos e Territórios. |
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Data corrente: |
08/05/2023 |
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Data da última atualização: |
29/02/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 4 |
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Autoria: |
FERNANDES, G. B.; SILVA, A. C. de L.; MARONHAS, M. E. S.; SANTOS, A. da S. dos; LIMA, P. H. C. |
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Afiliação: |
GABRIEL BIANCONI FERNANDES; ANA CLÁUDIA DE LIMA SILVA, IFG; MAITÊ EDITE SOUSA MARONHAS, ASA; AMAURY DA SILVA DOS SANTOS, CPATC; PAOLA HERNANDEZ CORTEZ LIMA, CNAT. |
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Título: |
Transgene flow: challenges to the on-farm conservation of maize landraces in the Brazilian Semi-Arid Region. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Plants, v. 11, n. 5, p. 2-24, 2022. |
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ISSN: |
2223-7747 |
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DOI: |
https://doi.org/10.3390/plants11050603 |
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Idioma: |
Inglês |
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Conteúdo: |
Brazil is one of the largest global producers of genetically modified crops and a center of origin and diversification of relevant species for agriculture and food. Transgenic monocultures occupy around 50 million hectares, whereas smallholder farmers, indigenous people, and traditional communities are responsible for in-situ/on-Farm conservation of local genetic resources. Based on 15 years of expertise in regulating GMOs and in cross-institutional agrobiodiversity conservation projects, this article discusses the challenges regarding the coexistence of these two agricultural models based on transgene flow detection in maize landraces. As part of a broad and unique participatory transgene-flow-monitoring process, 1098 samples of maize landraces were collected in the Brazilian Semi-arid Region between 2018 and 2021 and analyzed using immunochromatographic strips. The tests revealed 34% of samples with presence of GM proteins. It is concluded that the biosafety standards in force in Brazil do not allow the assurance of on-Farm conservation of maize. The sectors that contribute to agrobiodiversity conservation and do not benefit from using GM seeds are taking on the burden of this process. Transgene flow can be reduced by approving and enforcing more effective coexistence rules that consider maize landraces crop areas also as seed-producing areas added to full disclosure of commercial seeds origin. |
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Palavras-Chave: |
Family farming; Genetically Modified Organism; Maize varietie; Milho crioulo; Organismo Geneticamente Modificado. |
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Thesagro: |
Agricultura Familiar; Milho; Semente; Zea Mays. |
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Categoria do assunto: |
Q Alimentos e Nutrição Humana |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1153573/1/CNAT-3.pdf
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Marc: |
LEADER 02333naa a2200301 a 4500
001 2153573
005 2024-02-29
008 2022 bl uuuu u00u1 u #d
022 $a2223-7747
024 7 $ahttps://doi.org/10.3390/plants11050603$2DOI
100 1 $aFERNANDES, G. B.
245 $aTransgene flow$bchallenges to the on-farm conservation of maize landraces in the Brazilian Semi-Arid Region.$h[electronic resource]
260 $c2022
520 $aBrazil is one of the largest global producers of genetically modified crops and a center of origin and diversification of relevant species for agriculture and food. Transgenic monocultures occupy around 50 million hectares, whereas smallholder farmers, indigenous people, and traditional communities are responsible for in-situ/on-Farm conservation of local genetic resources. Based on 15 years of expertise in regulating GMOs and in cross-institutional agrobiodiversity conservation projects, this article discusses the challenges regarding the coexistence of these two agricultural models based on transgene flow detection in maize landraces. As part of a broad and unique participatory transgene-flow-monitoring process, 1098 samples of maize landraces were collected in the Brazilian Semi-arid Region between 2018 and 2021 and analyzed using immunochromatographic strips. The tests revealed 34% of samples with presence of GM proteins. It is concluded that the biosafety standards in force in Brazil do not allow the assurance of on-Farm conservation of maize. The sectors that contribute to agrobiodiversity conservation and do not benefit from using GM seeds are taking on the burden of this process. Transgene flow can be reduced by approving and enforcing more effective coexistence rules that consider maize landraces crop areas also as seed-producing areas added to full disclosure of commercial seeds origin.
650 $aAgricultura Familiar
650 $aMilho
650 $aSemente
650 $aZea Mays
653 $aFamily farming
653 $aGenetically Modified Organism
653 $aMaize varietie
653 $aMilho crioulo
653 $aOrganismo Geneticamente Modificado
700 1 $aSILVA, A. C. de L.
700 1 $aMARONHAS, M. E. S.
700 1 $aSANTOS, A. da S. dos
700 1 $aLIMA, P. H. C.
773 $tPlants$gv. 11, n. 5, p. 2-24, 2022.
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Registro original: |
Embrapa Alimentos e Territórios (CNAT) |
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