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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
13/09/1995 |
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Data da última atualização: |
27/09/2013 |
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Autoria: |
McCULLOUGH, M. E. |
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Título: |
A study of techniques for measuring differences in forage quality dairy cows. |
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Ano de publicação: |
1958 |
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Fonte/Imprenta: |
Technical Bulletin Georgia Agricultural Experiment Station, n.4, p.1-22, 1958. |
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Idioma: |
Inglês |
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Conteúdo: |
Data from 60 intake, digestibility, grazing behavior and persistency of milk production observations on four typical Georgia pastures have been used to compare the value of various techniques in evaluating pasture changes. Within the data the following observations seem valid:
(1) Time spent grazing was unrelated to forage intake and milk production.
(2) Time spent ruminating was determined partially by dry matter intake and digestibility but
was also influenced by forage species and the individual cow.
(3) Forage intake was influenced significantly by level of milk production and by dry matter digestibility.
(4) The correlation between dry matter digestibility and persistency of milk production when expressed as a second degree polynomial was .865. Changes in dry matter digestibility apparently reflect changes not only in nutrient availability but also changes in dry matter intake and ration balance.
(5) The techniques employed in this study did not adequately measure all factors affecting
animal production on pasture forage. Until techniques are available for measuring all important factors, greater progress should be made with within-forage evaluation than from between-forage studies. |
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Palavras-Chave: |
Dairy cow; Gado de leite; Producao de leite. |
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Thesagro: |
Digestibilidade; Forragem. |
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Thesaurus Nal: |
digestibility; forage; milk production. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01822naa a2200217 a 4500
001 1786124
005 2013-09-27
008 1958 bl --- 0-- u #d
100 1 $aMcCULLOUGH, M. E.
245 $aA study of techniques for measuring differences in forage quality dairy cows.
260 $c1958
520 $aData from 60 intake, digestibility, grazing behavior and persistency of milk production observations on four typical Georgia pastures have been used to compare the value of various techniques in evaluating pasture changes. Within the data the following observations seem valid: (1) Time spent grazing was unrelated to forage intake and milk production. (2) Time spent ruminating was determined partially by dry matter intake and digestibility but was also influenced by forage species and the individual cow. (3) Forage intake was influenced significantly by level of milk production and by dry matter digestibility. (4) The correlation between dry matter digestibility and persistency of milk production when expressed as a second degree polynomial was .865. Changes in dry matter digestibility apparently reflect changes not only in nutrient availability but also changes in dry matter intake and ration balance. (5) The techniques employed in this study did not adequately measure all factors affecting animal production on pasture forage. Until techniques are available for measuring all important factors, greater progress should be made with within-forage evaluation than from between-forage studies.
650 $adigestibility
650 $aforage
650 $amilk production
650 $aDigestibilidade
650 $aForragem
653 $aDairy cow
653 $aGado de leite
653 $aProducao de leite
773 $tTechnical Bulletin Georgia Agricultural Experiment Station$gn.4, p.1-22, 1958.
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Registro original: |
Embrapa Pantanal (CPAP) |
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| Registros recuperados : 2 | |
| 1. |  | SOARES, J. R; CANTARELLA, H.; VARGAS, V. P; CARMO, J. B. do; MARTINS, A. A; SOUSA, R. de M.; ANDRADE, C. A. de. Enhanced-efficiency fertilizers in nitrous oxide emissions from urea applied to sugarcane. Journal of Environmental Quality, Madison, v. 44. n. 2, p. 423-430, 2015.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Meio Ambiente. |
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| 2. | | VARGAS, V. P; CANTARELLA, H.; MARTINS, A. A; SOUSA, R. de M.; SOARES, J. R; ANDRADE, C. A. de. Emissão de óxido nitroso de solos cultivados com cana-de-açúcar. In: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 34., 2013, Florianópolis. Ciência do solo: para quê e para quem: anais. Florianópolis: Sociedade Brasileira de Ciência do Solo, 2013. 4 p.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Meio Ambiente. |
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| Registros recuperados : 2 | |
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