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 | Acesso ao texto completo restrito à biblioteca da Embrapa Rondônia. Para informações adicionais entre em contato com cpafro.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Rondônia. |
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Data corrente: |
28/01/1999 |
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Data da última atualização: |
21/03/2022 |
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Autoria: |
SOUZA, R. S. de. |
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Afiliação: |
RENATO SANTOS DE SOUZA. |
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Título: |
Sistemas de produção de leite: um estudo de caso sobre estrutura, tecnologia, resultados e fatores de diferenciação. |
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Ano de publicação: |
1997 |
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Fonte/Imprenta: |
Revista de Economia e Sociologia Rural, Brasilia, v.35, n.3, p.83-101, jul./set. 1997. |
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Idioma: |
Português |
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Conteúdo: |
Descreve a analisa a rentabilidade da producao leiteira, segundo diferentes sistemas de producao, buscando interpretar essas diferencas e explicar o baixo nivel de adocao de tecnologia em unidades de producao de municipios representativos da Bacia Leiteira de Pelotas. Os principais resultados demonstraram a baixa rentabilidade da atividade leiteira em relacao as demais, explicando, em parte, o baixo nivel de investimento e a especializacao do setor. Constatou-se, tambem, maior rentabilidade do sistema especializado em relacao aos demais, bem como melhoria na competitividade do setor quando o produtor diversifica a producao com a criacao de novilhas para a venda. Alem disso, identificaram-se faotres comportamentais e infra-estruturais como importantes na manutencao de baixo nivel tecnologico e produtivo na atividade leiteira. |
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Palavras-Chave: |
Aspecto economico; Brasil; Pelotas; Rio Grande do Sul. |
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Thesagro: |
Bacia Leiteira; Leite; Rentabilidade; Sistema de Produção. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01527naa a2200217 a 4500
001 1701092
005 2022-03-21
008 1997 bl uuuu u00u1 u #d
100 1 $aSOUZA, R. S. de
245 $aSistemas de produção de leite$bum estudo de caso sobre estrutura, tecnologia, resultados e fatores de diferenciação.$h[electronic resource]
260 $c1997
520 $aDescreve a analisa a rentabilidade da producao leiteira, segundo diferentes sistemas de producao, buscando interpretar essas diferencas e explicar o baixo nivel de adocao de tecnologia em unidades de producao de municipios representativos da Bacia Leiteira de Pelotas. Os principais resultados demonstraram a baixa rentabilidade da atividade leiteira em relacao as demais, explicando, em parte, o baixo nivel de investimento e a especializacao do setor. Constatou-se, tambem, maior rentabilidade do sistema especializado em relacao aos demais, bem como melhoria na competitividade do setor quando o produtor diversifica a producao com a criacao de novilhas para a venda. Alem disso, identificaram-se faotres comportamentais e infra-estruturais como importantes na manutencao de baixo nivel tecnologico e produtivo na atividade leiteira.
650 $aBacia Leiteira
650 $aLeite
650 $aRentabilidade
650 $aSistema de Produção
653 $aAspecto economico
653 $aBrasil
653 $aPelotas
653 $aRio Grande do Sul
773 $tRevista de Economia e Sociologia Rural, Brasilia$gv.35, n.3, p.83-101, jul./set. 1997.
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Embrapa Rondônia (CPAF-RO) |
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Registro Completo
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
12/01/2009 |
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Data da última atualização: |
15/01/2009 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
STUCHI, E. S.; SILVA, S. R.; COLETTA-FILHO, H. D.; FRANCO, D.; CARVALHO, S. A.; SEMPIONATO, O. R.; DONADIO, L. C.; ALVES, K. C. S. |
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Afiliação: |
Eduardo Sanches Stuchi, CNPMF/EECB; S. R. Silva, EECB; H. D. Coletta-Filho, Centro Apta/IAC; D. Franco, Private Consultant; S. A. Carvalho, Centro Apta/IAC; O. R. Sempionato, EECB; L. C. Donadio, EECB; K. C. S. Alves, Private Consultant. |
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Título: |
Navelina ISA 315 sweet orange: a CVC tolerant cultivar. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
In: INTERNATIONAL RESEARCH CONFERENCE ON HUANGLONGBING, 2008, Orlando, Florida. Proceedings of the meeting... Orlando: Florida Citrus Mutual, 2008. p. 337. |
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Idioma: |
Inglês |
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Conteúdo: |
The citrus variegated chlorosis (CVC), caused by Xylella fastidiosa subp. pauca, is a serious disease in Brazil. The use of resistant cultivars is highly recommended to allow a long-term coexistence with the disease. From 1990 through 2007, 503 sweet orange cultivars were challenged against X. fasdiosa (Yamamoto et al., 2005; Souza et al., 2005). The Navelina ISA 315 cultivar - a clone recovered by in vitro culture of undeveloped ovules - was introduced from Italy for CVC resistance studies, and showed to be infected by cachexia during indexing procedures. Plants were established in two field blocks in 2000 (block 1) and 2001 (block 2) with a total of three and eight trees. One and four plants were inoculated by approach grafting of CVC infected nursery trees, respectively. Inoculation was performed in the field nine to eleven months after planting. Nursery trees of the cultivar were inoculated with bacterial suspension in 2006 and 2007. Twenty sweet orange trees showing severe symptoms of CVC were topworked with Navelina ISA 315 with a total of 248 buds grafted in 2007. Isolation of the bacteria infecting the original field trees and the topworked ones was performed. From 2000 through 2007, the presence of typical symptoms of the disease in the trees was evaluated visually twice a year. PCR tests using specific primers for X. fastidiosa were conducted for all trees in the two blocks and for the nursery and the topworked ones. None of the trees challenged showed symptoms despite the positive PCR results and bacteria recovering from the topworked trees (Stuchi et al., 2007). In February 2008, 69/218 topworked branches showed symptoms. However, the eleven trees in field showed no leaf and fruit symptoms. The behavior of Navelina ISA 315 could be explained by a somaclonal variation induced the tolerance to CVC or by the influence of Cachexia on CVC symptoms expression and by some endophytic as Curtobacterium flaccumfaciens colonizing the cultivar and inhibit the development of X.fastidiosa as reported previously (Araújo et al., 2002; Lacava et al. (2004). The same rationale is being considered now against HLB and 553 sweet oranges available in two Brazilian germplasm collections will challenged in field and screenhouse conditions. MenosThe citrus variegated chlorosis (CVC), caused by Xylella fastidiosa subp. pauca, is a serious disease in Brazil. The use of resistant cultivars is highly recommended to allow a long-term coexistence with the disease. From 1990 through 2007, 503 sweet orange cultivars were challenged against X. fasdiosa (Yamamoto et al., 2005; Souza et al., 2005). The Navelina ISA 315 cultivar - a clone recovered by in vitro culture of undeveloped ovules - was introduced from Italy for CVC resistance studies, and showed to be infected by cachexia during indexing procedures. Plants were established in two field blocks in 2000 (block 1) and 2001 (block 2) with a total of three and eight trees. One and four plants were inoculated by approach grafting of CVC infected nursery trees, respectively. Inoculation was performed in the field nine to eleven months after planting. Nursery trees of the cultivar were inoculated with bacterial suspension in 2006 and 2007. Twenty sweet orange trees showing severe symptoms of CVC were topworked with Navelina ISA 315 with a total of 248 buds grafted in 2007. Isolation of the bacteria infecting the original field trees and the topworked ones was performed. From 2000 through 2007, the presence of typical symptoms of the disease in the trees was evaluated visually twice a year. PCR tests using specific primers for X. fastidiosa were conducted for all trees in the two blocks and for the nursery and the topworked ones. None of the trees challenged showed symptoms des... Mostrar Tudo |
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Palavras-Chave: |
Citros. |
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Thesagro: |
Clone; Doença de Planta; Germoplasma. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03030naa a2200253 a 4500
001 1655398
005 2009-01-15
008 2008 bl uuuu u00u1 u #d
100 1 $aSTUCHI, E. S.
245 $aNavelina ISA 315 sweet orange$ba CVC tolerant cultivar.
260 $c2008
520 $aThe citrus variegated chlorosis (CVC), caused by Xylella fastidiosa subp. pauca, is a serious disease in Brazil. The use of resistant cultivars is highly recommended to allow a long-term coexistence with the disease. From 1990 through 2007, 503 sweet orange cultivars were challenged against X. fasdiosa (Yamamoto et al., 2005; Souza et al., 2005). The Navelina ISA 315 cultivar - a clone recovered by in vitro culture of undeveloped ovules - was introduced from Italy for CVC resistance studies, and showed to be infected by cachexia during indexing procedures. Plants were established in two field blocks in 2000 (block 1) and 2001 (block 2) with a total of three and eight trees. One and four plants were inoculated by approach grafting of CVC infected nursery trees, respectively. Inoculation was performed in the field nine to eleven months after planting. Nursery trees of the cultivar were inoculated with bacterial suspension in 2006 and 2007. Twenty sweet orange trees showing severe symptoms of CVC were topworked with Navelina ISA 315 with a total of 248 buds grafted in 2007. Isolation of the bacteria infecting the original field trees and the topworked ones was performed. From 2000 through 2007, the presence of typical symptoms of the disease in the trees was evaluated visually twice a year. PCR tests using specific primers for X. fastidiosa were conducted for all trees in the two blocks and for the nursery and the topworked ones. None of the trees challenged showed symptoms despite the positive PCR results and bacteria recovering from the topworked trees (Stuchi et al., 2007). In February 2008, 69/218 topworked branches showed symptoms. However, the eleven trees in field showed no leaf and fruit symptoms. The behavior of Navelina ISA 315 could be explained by a somaclonal variation induced the tolerance to CVC or by the influence of Cachexia on CVC symptoms expression and by some endophytic as Curtobacterium flaccumfaciens colonizing the cultivar and inhibit the development of X.fastidiosa as reported previously (Araújo et al., 2002; Lacava et al. (2004). The same rationale is being considered now against HLB and 553 sweet oranges available in two Brazilian germplasm collections will challenged in field and screenhouse conditions.
650 $aClone
650 $aDoença de Planta
650 $aGermoplasma
653 $aCitros
700 1 $aSILVA, S. R.
700 1 $aCOLETTA-FILHO, H. D.
700 1 $aFRANCO, D.
700 1 $aCARVALHO, S. A.
700 1 $aSEMPIONATO, O. R.
700 1 $aDONADIO, L. C.
700 1 $aALVES, K. C. S
773 $tIn: INTERNATIONAL RESEARCH CONFERENCE ON HUANGLONGBING, 2008, Orlando, Florida. Proceedings of the meeting... Orlando: Florida Citrus Mutual, 2008. p. 337.
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Embrapa Mandioca e Fruticultura (CNPMF) |
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