| |
|
|
| Registros recuperados : 16 | |
| 2. |  | ANDRIOLO, J. L.; LUZ, G. L. da; BARROS, G. T.; GODOI, R. dos S. Cultivo hidropônico da alface empregando substratos. Horticultura Brasileira, Brasília, v. 22, n. 2, jul. 2004. Suplemento 2. CDS-ROM. Trabalho apresentado no 44º Congresso Brasileiro de Olericultura, 2004. Publicado também como resumo em: Horticultura Brasileira, Brasília, v. 22, n. 2, p. 356, jul. 2004. Suplemento 1.| Biblioteca(s): Embrapa Hortaliças. |
|   |
| 3. | | ANDRIOLO, J. L.; LUZ, G. L. da; GIRALDI, C.; GODOI, R. dos S.; BARROS, G. T. Cultivo hidropônico da alface empregando substratos: uma alternativa a NFT? Horticultura Brasileira, Brasília, DF, v. 22, n. 4, p. 794-798, out./dez, 2006.| Biblioteca(s): Embrapa Hortaliças. |
|  |
| 5. | | LOPES, S. J.; BRUM, B.; FAGAN, E. B.; LUZ, G. L. da; MEDEIROS, S. L. P. Estimativa da área foliar de meloeiro em estádios fenólogicos por fotos digitais. Ciência Rural, Santa Maria, v. 37, n. 4, p. 1153-1156, jul./ago. 2007.| Biblioteca(s): Embrapa Hortaliças. |
| |
| 6. | | ROSS, T. D.; WITTER, M.; LUZ, G. L. da; ANDRÍOLO, J. L. Efeito de três níveis de nitrogênio na solução nutritiva sobre o crescimento e desenvolvimento do tomateiro cultivado em substrato. Horticultura Brasileira, Brasília, v. 21, n. 2, jul. 2003. Suplemento 2. Trabalho apresentado no 43º Congresso Brasileiro de Olericultura, 2003. Publicado também como resumo em: Horticultura Brasileira, Brasília, v. 21, n. 2, p. 293, jul. 2003. Suplemento 1.| Biblioteca(s): Embrapa Hortaliças. |
| |
| 7. | | BIALOZOR, A.; LUZ, G. L. da; MEDEIROS, S. L. P.; TOMM, G. O. Desempenho da canola em cinco épocas de semeadura na Depressão Central do Rio Grande do Sul. In: SIMPÓSIO ESTADUAL DE AGROENERGIA; REUNIÃO TÉCNICA ANUAL DE AGROENERGIA, 3.; REUNIÃO TÉCNICA DA MANDIOCA, 10.; REUNIÃO TÉCNICA DA BATATA-DOCE, 2., Pelotas, 2010. Anais... Pelotas: Embrapa Clima Temperado, 2010. 4 p. 1 CD-ROM. Organizado por Sérgio Delmar dos Anjos e Silva, Ivan Rodrigues de Almeida e Ana Cláudia Barneche de Oliveira.| Biblioteca(s): Embrapa Trigo. |
| |
| 9. | | ANDRIOLO, J. L.; LUZ, G. L. da; WITTER, M. H.; GODOI, R. dos S.; BARROS, G. T.; BORTOLOTTO, O. C. Growth and yield of lettuce plants under salinity. Horticultura Brasileira, Brasília, DF, v. 23, n. 4, p. 931-934, out./dez. 2005.| Biblioteca(s): Embrapa Hortaliças. |
| |
| 10. | | ADRIOLO, J. L.; GODOI, R. dos S.; COGO, C. M.; BORTOLOTTO, O.; LUZ, G. L. da; MADALOZ, J. C. Growth and development of lettuce plants at nigh NH4+:NO3-ratios in the nutrient solution. Horticultura Brasileira, Brasília, DF, v. 24, n. 3, p. 352-355, jul./set. 2006.| Biblioteca(s): Embrapa Hortaliças. |
| |
| 11. | | FAGAN, E. V.; CASAROLI, D.; SANTOS, O.; MEDEIROS, S.; SCHMIDT, D.; NOGUEIRA FILHO, H.; BORCIONI, E.; LUZ, G. L. da. Desempenho de treze cultivares de alface em hidroponia, no verão, em Santa Maria-RS. Horticultura Brasileira, Brasília, v. 22, n. 2, jul. 2004. Suplemento 2. Trabalho apresentado no 44º Congresso Brasileiro de Olericultura, 2004. Publicado também como resumo em: Horticultura Brasileira, Brasília, v. 22, n. 2, p. 461, jul. 2004. Suplemento.| Biblioteca(s): Embrapa Hortaliças. |
| |
| 12. | | COGO, C. M.; ANDRIOLO, J. L.; BISOGNIN, D. A.; GODOI, R. dos S.; BORTOLOTTO, O. C.; LUZ, G. L. da. Relação potássio-nitrogênio para o diagnóstico e manejo nutricional da cultura da batata. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 41, n. 12, p. 1781-1786, dez. 2006 Título em inglês: Nitrogen-potassium relationship for diagnosis of plant nutritional status and fertilization of the potato crop.| Biblioteca(s): Embrapa Hortaliças; Embrapa Unidades Centrais. |
|  |
| 13. | | LUZ, G. L. da; MEDEIROS, S. L. P.; TOMM, G. O.; BIALOZOR, A.; AMARAL, A. D. do; PIVOTO, D. Temperatura base inferior e ciclo de híbridos de canola. Ciência Rural, Santa Maria, v. 42, n. 9, p. 1549-1555, set. 2012.| Biblioteca(s): Embrapa Trigo. |
| |
| 14. | | FAGAN, E. B.; MEDEIROS, S. L. P.; SIMON, J.; BORCIONI, E.; LUZ, G. L. da; JASNIEWICZ, L. R.; DOURADO NETO, D.; MANFRON, P. A.; MÜLLER, L. Consumo hídrico do meloeiro hidropônico em ambiente protegido. Revista Brasileira de Agrometeorologia, Piracicaba, v. 14, n. 3, p. 318-326, 2006.| Biblioteca(s): Embrapa Agricultura Digital. |
| |
| 15. | | FAGAN, E. B.; MEDEIROS, S. L. P.; BORCIONI, E.; LUZ, G. L. da; SIMON, J.; JASNIEWICZ, L. R.; MANFRON, P. A.; MÚLLER, L.; DOURADO NETO, D. Influência de intervalos entre irrigações na fisiologia e produção de meloeiro sob sistema hidropônico. Revista Brasileira Agrociência, Pelotas, v. 11, n. 4, p. 429-436, out./dez. 2005| Biblioteca(s): Embrapa Hortaliças. |
| |
| 16. | | LUZ, G. L. da; MEDEIROS, S. L. P.; MANFRON, P. A.; AMARAL, A. D. do; MÜLLER, L.; TORRES, M. G.; MENTGES, L. A questão do nitrato em alface hidropônica e a saúde humana. Ciência Rural, Santa Maria, v. 38, n. 8, p. 2388-2394, nov. 2008.| Biblioteca(s): Embrapa Hortaliças. |
| |
| Registros recuperados : 16 | |
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
|
Data corrente: |
19/11/2012 |
|
Data da última atualização: |
01/06/2017 |
|
Tipo da produção científica: |
Nota Técnica/Nota Científica |
|
Autoria: |
GUIMARÃES, V. P.; TEDESCHI, L. O.; RODRIGUES, M. T. |
|
Afiliação: |
Vinícius P. Guimarães, Consultor da Embrapa Caprinos e Ovinos (CNPC); Luis O. Tedeschi; Marcelo T. Rodrigues. |
|
Título: |
Study of the impact of breeding seasons in the dynamics of dairy goat herds. |
|
Ano de publicação: |
2009 |
|
Fonte/Imprenta: |
Tropical and Subtropical Agroecosystems, v. 11, n. 1, p. 121-125, 2009. |
|
Idioma: |
Inglês |
|
Conteúdo: |
Abstract: The competitiveness in the animal production field has forced the smaller activities to be more efficient when compared to big business of the agro-industries. The dairy goat production is one of those market niches that need a better understand of its sector. For those reasons it has been proposed that by changing the number of reproduction seasons would increase income of the producers. The objectives of this study were to evaluate the impact of 1 or 2 annual reproductive cycles on production and economical health of dairy goats and to identify differences of production costs and revenues associated with changes in the herd dynamics as predicted by a mathematical model. A previously developed goat model using the System Dynamics approach to study long-term changes in the dynamics of the herd was used in these simulations. The model simulations used feeds, labor, and fixed costs as inputs and the outputs were revenues from milk production sales and sales of animals from all categories of the herd. The simulation time unit was ?month? and a long-term horizon of 10 years was considered for these simulations. The model was set up to simulate a freestall facility of a herd in equilibrium with 100 does in lactation. All parameters considered in this model assumed average values reported in production systems in the Southeast region of Brazil. The simulations results indicated that improvements of 10% in the fertility rate would increase the number animals in the herd up to 185% and 35% for one and two breeding season, respectively. Establishing a milk price as US$0.68 the break even for one and two breeding seasons was respectively US$0.62, and US$0.50, giving the systems with two breeding a capacity to support reductions on milk price up to 26% against 9% with one breeding season. When comparing the models with 1 or 2 breeding seasons was found that models with 2 breeding seasons was considerably more profitable and had a higher turnover than the model with 1 breeding season. The results indicate that the use of a second (artificial) breeding season might be an important management strategy to improve the efficiency of the dairy goat production systems. [Estudio del impacto de la estación reproductiva sobre la dinâmica de los rebaños lecheros]. MenosAbstract: The competitiveness in the animal production field has forced the smaller activities to be more efficient when compared to big business of the agro-industries. The dairy goat production is one of those market niches that need a better understand of its sector. For those reasons it has been proposed that by changing the number of reproduction seasons would increase income of the producers. The objectives of this study were to evaluate the impact of 1 or 2 annual reproductive cycles on production and economical health of dairy goats and to identify differences of production costs and revenues associated with changes in the herd dynamics as predicted by a mathematical model. A previously developed goat model using the System Dynamics approach to study long-term changes in the dynamics of the herd was used in these simulations. The model simulations used feeds, labor, and fixed costs as inputs and the outputs were revenues from milk production sales and sales of animals from all categories of the herd. The simulation time unit was ?month? and a long-term horizon of 10 years was considered for these simulations. The model was set up to simulate a freestall facility of a herd in equilibrium with 100 does in lactation. All parameters considered in this model assumed average values reported in production systems in the Southeast region of Brazil. The simulations results indicated that improvements of 10% in the fertility rate would increase the number animals in the herd u... Mostrar Tudo |
|
Palavras-Chave: |
Caprino leiteiro; Farm models; Modelo animal. |
|
Thesagro: |
Cabra leiteira; Sistema de produção. |
|
Thesaurus NAL: |
Brazil; Breeding; Goats. |
|
Categoria do assunto: |
B Sociologia Rural |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/70332/1/NT-Study-of-the-impact-.pdf
|
|
Marc: |
LEADER 02987naa a2200241 a 4500
001 1939904
005 2017-06-01
008 2009 bl uuuu u00u1 u #d
100 1 $aGUIMARÃES, V. P.
245 $aStudy of the impact of breeding seasons in the dynamics of dairy goat herds.$h[electronic resource]
260 $c2009
520 $aAbstract: The competitiveness in the animal production field has forced the smaller activities to be more efficient when compared to big business of the agro-industries. The dairy goat production is one of those market niches that need a better understand of its sector. For those reasons it has been proposed that by changing the number of reproduction seasons would increase income of the producers. The objectives of this study were to evaluate the impact of 1 or 2 annual reproductive cycles on production and economical health of dairy goats and to identify differences of production costs and revenues associated with changes in the herd dynamics as predicted by a mathematical model. A previously developed goat model using the System Dynamics approach to study long-term changes in the dynamics of the herd was used in these simulations. The model simulations used feeds, labor, and fixed costs as inputs and the outputs were revenues from milk production sales and sales of animals from all categories of the herd. The simulation time unit was ?month? and a long-term horizon of 10 years was considered for these simulations. The model was set up to simulate a freestall facility of a herd in equilibrium with 100 does in lactation. All parameters considered in this model assumed average values reported in production systems in the Southeast region of Brazil. The simulations results indicated that improvements of 10% in the fertility rate would increase the number animals in the herd up to 185% and 35% for one and two breeding season, respectively. Establishing a milk price as US$0.68 the break even for one and two breeding seasons was respectively US$0.62, and US$0.50, giving the systems with two breeding a capacity to support reductions on milk price up to 26% against 9% with one breeding season. When comparing the models with 1 or 2 breeding seasons was found that models with 2 breeding seasons was considerably more profitable and had a higher turnover than the model with 1 breeding season. The results indicate that the use of a second (artificial) breeding season might be an important management strategy to improve the efficiency of the dairy goat production systems. [Estudio del impacto de la estación reproductiva sobre la dinâmica de los rebaños lecheros].
650 $aBrazil
650 $aBreeding
650 $aGoats
650 $aCabra leiteira
650 $aSistema de produção
653 $aCaprino leiteiro
653 $aFarm models
653 $aModelo animal
700 1 $aTEDESCHI, L. O.
700 1 $aRODRIGUES, M. T.
773 $tTropical and Subtropical Agroecosystems$gv. 11, n. 1, p. 121-125, 2009.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
