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Registro Completo |
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Biblioteca(s): |
Embrapa Rondônia; Embrapa Suínos e Aves. |
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Data corrente: |
27/03/1997 |
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Data da última atualização: |
09/07/2007 |
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Autoria: |
CARNEIRO, G. G. |
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Título: |
Eficiencia reprodutiva e produtividade em suinos. |
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Ano de publicação: |
1958 |
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Fonte/Imprenta: |
Belo Horizonte: Universidade Rural do Estado de Minas Gerais, 1958. |
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Páginas: |
99p. |
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Idioma: |
Português |
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Notas: |
Tese Livre-Docencia |
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Conteúdo: |
Foram estudados os dados de 160 porcas e 445 leitegadas racialmente puras, de 1949 a 1956 inclusive, com o objeto principal de identificar e descrever os fatores relativos a eficiencia reprodutiva e a produtividade de porcas, mantidas na condicoes de alimentacao e manejo geral adotadas no Instituto de Zootecnia de Minas Gerais. Foi tambem estimado o grau de "repetibilidade" (repeatability) da produtividade das porcas, medido pelo numero de leitoes na leitegada e peso total da leitegada em cada uma das tres seguintes idades dessa leitegada: nascimento, terceira e oitava semanas. |
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Palavras-Chave: |
Desempenho reprodutivo; Fertility; Porcas; Productivity; Sow. |
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Thesagro: |
Fertilidade; Melhoramento Animal; Produtividade; Reprodução; Suíno. |
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Thesaurus Nal: |
reproductive performance; swine. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01307nam a2200277 a 4500
001 1431997
005 2007-07-09
008 1958 bl uuuu m 00u1 u #d
100 1 $aCARNEIRO, G. G.
245 $aEficiencia reprodutiva e produtividade em suinos.
260 $aBelo Horizonte: Universidade Rural do Estado de Minas Gerais$c1958
300 $a99p.
500 $aTese Livre-Docencia
520 $aForam estudados os dados de 160 porcas e 445 leitegadas racialmente puras, de 1949 a 1956 inclusive, com o objeto principal de identificar e descrever os fatores relativos a eficiencia reprodutiva e a produtividade de porcas, mantidas na condicoes de alimentacao e manejo geral adotadas no Instituto de Zootecnia de Minas Gerais. Foi tambem estimado o grau de "repetibilidade" (repeatability) da produtividade das porcas, medido pelo numero de leitoes na leitegada e peso total da leitegada em cada uma das tres seguintes idades dessa leitegada: nascimento, terceira e oitava semanas.
650 $areproductive performance
650 $aswine
650 $aFertilidade
650 $aMelhoramento Animal
650 $aProdutividade
650 $aReprodução
650 $aSuíno
653 $aDesempenho reprodutivo
653 $aFertility
653 $aPorcas
653 $aProductivity
653 $aSow
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Registro original: |
Embrapa Suínos e Aves (CNPSA) |
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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: |
01/12/2014 |
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Data da última atualização: |
05/02/2024 |
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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: |
PACIULLO, D. S. C.; PIRES, M. de F. A.; AROEIRA, L. J. M.; MORENZ, M. J. F.; MAURÍCIO, R. M.; GOMIDE, C. A. de M.; SILVEIRA, S. R. |
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Afiliação: |
DOMINGOS SAVIO CAMPOS PACIULLO, CNPGL; MARIA DE FATIMA AVILA PIRES, CNPGL; LUIZ J. M. AROEIRA, Pesquisador aposentado - Embrapa Gado de Leite; MIRTON JOSE FROTA MORENZ, CNPGL; R. M. MAURÍCIO, URSJ; CARLOS AUGUSTO DE MIRANDA GOMIDE, CNPGL; S. R. SILVEIRA, UFSJ. |
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Título: |
Sward characteristics and performance of dairy cows in organic grass-legume pastures shaded by tropical trees |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Animal, v. 8, n. 8, p. 1264-1271, 2014 |
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Idioma: |
Inglês |
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Conteúdo: |
The silvopastoral system (SPS) has been suggested to ensure sustainability in animal production systems in tropical ecosystems. The objective of this study was to evaluate pasture characteristics, herbage intake, grazing activity and milk yield of Holstein×Zebu cows managed in two grazing systems (treatments): SPS dominated by a graminaceous forage (Brachiaria decumbens) intercropped with different leguminous herbaceous forages (Stylosanthes spp., Pueraria phaseoloides and Calopogonium mucunoides) and legume trees (Acacia mangium, Gliricidia sepium and Leucaena leucocephala), and open pasture (OP) of B. decumbens intercropped only with Stylosanthes spp. Pastures were managed according to the rules for organic cattle production. The study was carried out by following a switch back format with 12 cows, 6 for each treatment, over 3 experimental years. Herbage mass was similar (P>0.05) for both treatments, supporting an average stocking rate of 1.23 AU/ha. Daily dry matter intake did not vary (P>0.05) between treatments (average of 11.3±1.02 kg/cow per day, corresponding to 2.23±0.2% BW). Milk yield was higher (P<0.05; 10.4±0.06 kg/cow per day) in the SPS than in the OP (9.5±0.06 kg/cow per day) during the 1st year, but did not significantly differ (P>0.05) in subsequent years. The highest (P<0.05) values for herbage mass and milk yield were observed during the 3rd year. In the SPS, with moderate shade (19% shade relative to a full-sun condition), the grass CP was higher (P<0.05) than in the OP, although the NDF content and digestibility coefficient were not modified. The animals spent more time (P<0.05) idling in the SPS than in OP. The higher legume proportion in the SPS was associated with the higher CP level in B. decumbens relative to the OP, which could explain the better (P<0.05) performance of the cows in silvopastoral areas during the 1st year. However, during the 2nd and 3rd years, similarities in the legume percentages of both systems resulted in similar (P>0.05) milk yields. Low persistence of Stylosanthes guianensis was observed over the experimental period, indicating that the persistence of forage legumes under grazing could be improved using adapted cultivars that have higher annual seed production. The SPS and a diversified botanical composition of the pasture using legume species mixed with grasses are recommended for organic milk production. MenosThe silvopastoral system (SPS) has been suggested to ensure sustainability in animal production systems in tropical ecosystems. The objective of this study was to evaluate pasture characteristics, herbage intake, grazing activity and milk yield of Holstein×Zebu cows managed in two grazing systems (treatments): SPS dominated by a graminaceous forage (Brachiaria decumbens) intercropped with different leguminous herbaceous forages (Stylosanthes spp., Pueraria phaseoloides and Calopogonium mucunoides) and legume trees (Acacia mangium, Gliricidia sepium and Leucaena leucocephala), and open pasture (OP) of B. decumbens intercropped only with Stylosanthes spp. Pastures were managed according to the rules for organic cattle production. The study was carried out by following a switch back format with 12 cows, 6 for each treatment, over 3 experimental years. Herbage mass was similar (P>0.05) for both treatments, supporting an average stocking rate of 1.23 AU/ha. Daily dry matter intake did not vary (P>0.05) between treatments (average of 11.3±1.02 kg/cow per day, corresponding to 2.23±0.2% BW). Milk yield was higher (P<0.05; 10.4±0.06 kg/cow per day) in the SPS than in the OP (9.5±0.06 kg/cow per day) during the 1st year, but did not significantly differ (P>0.05) in subsequent years. The highest (P<0.05) values for herbage mass and milk yield were observed during the 3rd year. In the SPS, with moderate shade (19% shade relative to a full-sun condition), the grass CP was higher (P<0.05... Mostrar Tudo |
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Palavras-Chave: |
Dairy cow; Organic milk production. |
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Thesaurus NAL: |
agroforestry; forage legumes; nutritive value. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 03181naa a2200253 a 4500
001 2001176
005 2024-02-05
008 2014 bl uuuu u00u1 u #d
100 1 $aPACIULLO, D. S. C.
245 $aSward characteristics and performance of dairy cows in organic grass-legume pastures shaded by tropical trees$h[electronic resource]
260 $c2014
520 $aThe silvopastoral system (SPS) has been suggested to ensure sustainability in animal production systems in tropical ecosystems. The objective of this study was to evaluate pasture characteristics, herbage intake, grazing activity and milk yield of Holstein×Zebu cows managed in two grazing systems (treatments): SPS dominated by a graminaceous forage (Brachiaria decumbens) intercropped with different leguminous herbaceous forages (Stylosanthes spp., Pueraria phaseoloides and Calopogonium mucunoides) and legume trees (Acacia mangium, Gliricidia sepium and Leucaena leucocephala), and open pasture (OP) of B. decumbens intercropped only with Stylosanthes spp. Pastures were managed according to the rules for organic cattle production. The study was carried out by following a switch back format with 12 cows, 6 for each treatment, over 3 experimental years. Herbage mass was similar (P>0.05) for both treatments, supporting an average stocking rate of 1.23 AU/ha. Daily dry matter intake did not vary (P>0.05) between treatments (average of 11.3±1.02 kg/cow per day, corresponding to 2.23±0.2% BW). Milk yield was higher (P<0.05; 10.4±0.06 kg/cow per day) in the SPS than in the OP (9.5±0.06 kg/cow per day) during the 1st year, but did not significantly differ (P>0.05) in subsequent years. The highest (P<0.05) values for herbage mass and milk yield were observed during the 3rd year. In the SPS, with moderate shade (19% shade relative to a full-sun condition), the grass CP was higher (P<0.05) than in the OP, although the NDF content and digestibility coefficient were not modified. The animals spent more time (P<0.05) idling in the SPS than in OP. The higher legume proportion in the SPS was associated with the higher CP level in B. decumbens relative to the OP, which could explain the better (P<0.05) performance of the cows in silvopastoral areas during the 1st year. However, during the 2nd and 3rd years, similarities in the legume percentages of both systems resulted in similar (P>0.05) milk yields. Low persistence of Stylosanthes guianensis was observed over the experimental period, indicating that the persistence of forage legumes under grazing could be improved using adapted cultivars that have higher annual seed production. The SPS and a diversified botanical composition of the pasture using legume species mixed with grasses are recommended for organic milk production.
650 $aagroforestry
650 $aforage legumes
650 $anutritive value
653 $aDairy cow
653 $aOrganic milk production
700 1 $aPIRES, M. de F. A.
700 1 $aAROEIRA, L. J. M.
700 1 $aMORENZ, M. J. F.
700 1 $aMAURÍCIO, R. M.
700 1 $aGOMIDE, C. A. de M.
700 1 $aSILVEIRA, S. R.
773 $tAnimal$gv. 8, n. 8, p. 1264-1271, 2014
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Embrapa Gado de Leite (CNPGL) |
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