| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Meio-Norte. |
|
Data corrente: |
31/05/1996 |
|
Data da última atualização: |
31/05/1996 |
|
Autoria: |
HOLMANN, F.; BLAKE, R. W.; HAHN, M. V.; BARKER, R.; MILLIGAN, R. A.; OLTENACU, P. A.; STANTON, T. L. |
|
Título: |
Comparative profitability of purebred and crossbred Holstein Herds in Venezuela. |
|
Ano de publicação: |
1990 |
|
Fonte/Imprenta: |
Journal of Dairy Science, v.73, n.8, p.2190-2205, 1990. |
|
Idioma: |
Inglês |
|
Conteúdo: |
The objective was to compare the profitability of dual purpose systems(beef and milk) with Holstein crossbred cattle in lowland ecozones with those in highland dairy systems using puerebred Holsteins. Data werevariable costs for feed, labor, health, and reproduction; gross incomes from milk and beef from surveys of 157 farms in 1987 to 1988; and records of dairy performance. Profit measures were milk income over feedcost for lactating cows and net margin for all cows (gross income frommilk and beef minus variable costs per year). Least squares methods were used to estimate costs and profit measures from a model containing effects of breed, ecozone, herd, size, reproduction system, interviewer, and milk yield as a covariate. Milk income over feed cost for dairysystems was greater than for dual purpose systems, but this was a misleading profit measur because it ignores beef sales and other costs andrelevant animal categories (e.g., dry cows). When these factors were considered, dual purpose systems with crossbred cows (lowest cost) and dairy systems with Holsteins had similar net margins. However, greaterprofits were indicated for dual purpose systems when the average milk per cow for these systems was considered to eam similar profits, eliminating the concentrate feed subsidy and the preferential exchange ratebeef production, transport costs, and fixed costs of capital. Thus, the most economical production system for Venezuela at this time is dualpurpose herds with crossbred canttle in the lowland ecozones. MenosThe objective was to compare the profitability of dual purpose systems(beef and milk) with Holstein crossbred cattle in lowland ecozones with those in highland dairy systems using puerebred Holsteins. Data werevariable costs for feed, labor, health, and reproduction; gross incomes from milk and beef from surveys of 157 farms in 1987 to 1988; and records of dairy performance. Profit measures were milk income over feedcost for lactating cows and net margin for all cows (gross income frommilk and beef minus variable costs per year). Least squares methods were used to estimate costs and profit measures from a model containing effects of breed, ecozone, herd, size, reproduction system, interviewer, and milk yield as a covariate. Milk income over feed cost for dairysystems was greater than for dual purpose systems, but this was a misleading profit measur because it ignores beef sales and other costs andrelevant animal categories (e.g., dry cows). When these factors were considered, dual purpose systems with crossbred cows (lowest cost) and dairy systems with Holsteins had similar net margins. However, greaterprofits were indicated for dual purpose systems when the average milk per cow for these systems was considered to eam similar profits, eliminating the concentrate feed subsidy and the preferential exchange ratebeef production, transport costs, and fixed costs of capital. Thus, the most economical production system for Venezuela at this time is dualpurpose herds with crossbred ... Mostrar Tudo |
|
Palavras-Chave: |
Bovino de leite; Raca pura. |
|
Thesagro: |
Cruzamento; Sistema de Produção. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02190naa a2200241 a 4500
001 1052078
005 1996-05-31
008 1990 bl --- 0-- u #d
100 1 $aHOLMANN, F.
245 $aComparative profitability of purebred and crossbred Holstein Herds in Venezuela.
260 $c1990
520 $aThe objective was to compare the profitability of dual purpose systems(beef and milk) with Holstein crossbred cattle in lowland ecozones with those in highland dairy systems using puerebred Holsteins. Data werevariable costs for feed, labor, health, and reproduction; gross incomes from milk and beef from surveys of 157 farms in 1987 to 1988; and records of dairy performance. Profit measures were milk income over feedcost for lactating cows and net margin for all cows (gross income frommilk and beef minus variable costs per year). Least squares methods were used to estimate costs and profit measures from a model containing effects of breed, ecozone, herd, size, reproduction system, interviewer, and milk yield as a covariate. Milk income over feed cost for dairysystems was greater than for dual purpose systems, but this was a misleading profit measur because it ignores beef sales and other costs andrelevant animal categories (e.g., dry cows). When these factors were considered, dual purpose systems with crossbred cows (lowest cost) and dairy systems with Holsteins had similar net margins. However, greaterprofits were indicated for dual purpose systems when the average milk per cow for these systems was considered to eam similar profits, eliminating the concentrate feed subsidy and the preferential exchange ratebeef production, transport costs, and fixed costs of capital. Thus, the most economical production system for Venezuela at this time is dualpurpose herds with crossbred canttle in the lowland ecozones.
650 $aCruzamento
650 $aSistema de Produção
653 $aBovino de leite
653 $aRaca pura
700 1 $aBLAKE, R. W.
700 1 $aHAHN, M. V.
700 1 $aBARKER, R.
700 1 $aMILLIGAN, R. A.
700 1 $aOLTENACU, P. A.
700 1 $aSTANTON, T. L.
773 $tJournal of Dairy Science$gv.73, n.8, p.2190-2205, 1990.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Meio-Norte (CPAMN) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br. |
Registro Completo
|
Biblioteca(s): |
Embrapa Instrumentação. |
|
Data corrente: |
20/02/2017 |
|
Data da última atualização: |
03/03/2017 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
A - 2 |
|
Autoria: |
SILVA, L. F. da; LOPES, O. F.; MENDONÇA, V. R. de; CARVALHO, K. T. G.; LONGO, E.; RIBEIRO, C.; MASTELARO, V. R. |
|
Afiliação: |
CAUE RIBEIRO DE OLIVEIRA, CNPDIA. |
|
Título: |
An understanding of the photocatalytic properties and pollutant degradation mechanism of SrTiO3 nanoparticles. [3 é subscrito]. |
|
Ano de publicação: |
2016 |
|
Fonte/Imprenta: |
Photochemistry and Photobiology, [S. l.], v. 92, p. 371-378, 2016. |
|
Idioma: |
Inglês |
|
Palavras-Chave: |
Ceramica; Fotocatálise; Nanopartícula. |
|
Thesagro: |
Microscopia. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 00727naa a2200229 a 4500
001 2064740
005 2017-03-03
008 2016 bl uuuu u00u1 u #d
100 1 $aSILVA, L. F. da
245 $aAn understanding of the photocatalytic properties and pollutant degradation mechanism of SrTiO3 nanoparticles. [3 é subscrito].$h[electronic resource]
260 $c2016
650 $aMicroscopia
653 $aCeramica
653 $aFotocatálise
653 $aNanopartícula
700 1 $aLOPES, O. F.
700 1 $aMENDONÇA, V. R. de
700 1 $aCARVALHO, K. T. G.
700 1 $aLONGO, E.
700 1 $aRIBEIRO, C.
700 1 $aMASTELARO, V. R.
773 $tPhotochemistry and Photobiology, [S. l.]$gv. 92, p. 371-378, 2016.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Instrumentação (CNPDIA) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Expressão de busca inválida. Verifique!!! |
|
|
