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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
24/01/1997 |
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Data da última atualização: |
24/01/1997 |
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Autoria: |
SPEHAR, C. R.; SOUZA, P. I. M. |
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Título: |
Sustainable cropping systems in the Brazilian cerrados. |
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Ano de publicação: |
1996 |
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Fonte/Imprenta: |
Integrated Crop Management, v.1, p.1-27, 1996. |
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Idioma: |
Inglês |
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Conteúdo: |
In Brazil, the scarcity of naturally fertile land to feed the growing population has resulted in the expansion of agriculture into the savannahs (Cerrados). During the last 20 years, massive public investment has supported agricultural research and provided incentives to the agricultural sector for development of that region. Today, the Cerrados are a major producer of crops as well beef and forestry products. The success of this possibilities for agricultural expansion on a high-input, sustainable basis. Agricultural expansion into the Cerrados has benefited from natural conditions such as sufficient rainfall, favourable temperatures, a topography that is suited to mechanization, good soil drainage as well as low land prices. Production was limited by undesirable soil properties (high acidity and Al levels and low fertility and water-holding capacity), distance from the sea ports and major cities and lack infrastucture. Skilled farmers from southern Brazil brought their entrepreneurial endurance to the unfamiliar Cerrados. They quickly adopted new technologies for the success of agriculture in the region, notably cultivation of soybean. The adaptation of the soybean crop to these low latitudes required development of varieties with long juvenile stage. This breakthrough opened the way for more diverse crop rotation possibilities. Other crops now being grown include maize, beans, cassava, coffee, fruit crops and pastures. It expected tha other non-traditional crops such as cotton, quinoa, sesame, guar, ... MenosIn Brazil, the scarcity of naturally fertile land to feed the growing population has resulted in the expansion of agriculture into the savannahs (Cerrados). During the last 20 years, massive public investment has supported agricultural research and provided incentives to the agricultural sector for development of that region. Today, the Cerrados are a major producer of crops as well beef and forestry products. The success of this possibilities for agricultural expansion on a high-input, sustainable basis. Agricultural expansion into the Cerrados has benefited from natural conditions such as sufficient rainfall, favourable temperatures, a topography that is suited to mechanization, good soil drainage as well as low land prices. Production was limited by undesirable soil properties (high acidity and Al levels and low fertility and water-holding capacity), distance from the sea ports and major cities and lack infrastucture. Skilled farmers from southern Brazil brought their entrepreneurial endurance to the unfamiliar Cerrados. They quickly adopted new technologies for the success of agriculture in the region, notably cultivation of soybean. The adaptation of the soybean crop to these low latitudes required development of varieties with long juvenile stage. This breakthrough opened the way for more diverse crop rotation possibilities. Other crops now being grown include maize, beans, cassava, coffee, fruit crops and pastures. It expected tha other non-traditional crops such as c... Mostrar Tudo |
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Palavras-Chave: |
Brasil; Cultura agricola; Cultura anual; Relief; Rotational cropping; Soil managemnt; Sustainability; Sustentabilidade. |
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Thesagro: |
Adubação Verde; Cerrado; Conservação do Solo; Defesa Vegetal; Glycine Max; Manejo do Solo; Pastagem; Relevo; Rendimento; Rotação de Cultura; Sistema de Cultivo; Soja; Solo; Uso da Terra; Vegetação. |
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Thesaurus Nal: |
annuals; Brazil; crop yield; cropping systems; crops; green manures; land use; pastures; plant protection; soil; soil conservation; soybeans; vegetation. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02908naa a2200565 a 4500
001 1552207
005 1997-01-24
008 1996 bl uuuu u00u1 u #d
100 1 $aSPEHAR, C. R.
245 $aSustainable cropping systems in the Brazilian cerrados.
260 $c1996
520 $aIn Brazil, the scarcity of naturally fertile land to feed the growing population has resulted in the expansion of agriculture into the savannahs (Cerrados). During the last 20 years, massive public investment has supported agricultural research and provided incentives to the agricultural sector for development of that region. Today, the Cerrados are a major producer of crops as well beef and forestry products. The success of this possibilities for agricultural expansion on a high-input, sustainable basis. Agricultural expansion into the Cerrados has benefited from natural conditions such as sufficient rainfall, favourable temperatures, a topography that is suited to mechanization, good soil drainage as well as low land prices. Production was limited by undesirable soil properties (high acidity and Al levels and low fertility and water-holding capacity), distance from the sea ports and major cities and lack infrastucture. Skilled farmers from southern Brazil brought their entrepreneurial endurance to the unfamiliar Cerrados. They quickly adopted new technologies for the success of agriculture in the region, notably cultivation of soybean. The adaptation of the soybean crop to these low latitudes required development of varieties with long juvenile stage. This breakthrough opened the way for more diverse crop rotation possibilities. Other crops now being grown include maize, beans, cassava, coffee, fruit crops and pastures. It expected tha other non-traditional crops such as cotton, quinoa, sesame, guar, ...
650 $aannuals
650 $aBrazil
650 $acrop yield
650 $acropping systems
650 $acrops
650 $agreen manures
650 $aland use
650 $apastures
650 $aplant protection
650 $asoil
650 $asoil conservation
650 $asoybeans
650 $avegetation
650 $aAdubação Verde
650 $aCerrado
650 $aConservação do Solo
650 $aDefesa Vegetal
650 $aGlycine Max
650 $aManejo do Solo
650 $aPastagem
650 $aRelevo
650 $aRendimento
650 $aRotação de Cultura
650 $aSistema de Cultivo
650 $aSoja
650 $aSolo
650 $aUso da Terra
650 $aVegetação
653 $aBrasil
653 $aCultura agricola
653 $aCultura anual
653 $aRelief
653 $aRotational cropping
653 $aSoil managemnt
653 $aSustainability
653 $aSustentabilidade
700 1 $aSOUZA, P. I. M.
773 $tIntegrated Crop Management$gv.1, p.1-27, 1996.
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Registro original: |
Embrapa Cerrados (CPAC) |
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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 Caprinos e Ovinos; Embrapa Gado de Leite; Embrapa Pecuária Sudeste. |
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Data corrente: |
15/01/2024 |
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Data da última atualização: |
06/03/2024 |
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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: |
GONÇALVES, J. D.; VERGANI, G. B.; RODRIGUES, J. N. D.; DIAS, J. H.; PEREIRA, V. S. do A.; GARCIA, A. R.; ESTEVES, S. N.; FONSECA, J. F. da; OLIVEIRA, M. E. F. |
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Afiliação: |
JOEDSON DANTAS GONÇALVES, São Paulo State University; GABRIEL BRUN VERGANI, São Paulo State University; JULIANA NASCIMENTO DUARTE RODRIGUES, Federal University of Viçosa; JENNIFFER HAUSCHILDT DIAS, Federal University of Viçosa; VERONICA SCHINAIDER DO A PEREIRA, CNPGL; ALEXANDRE ROSSETTO GARCIA, CPPSE; SERGIO NOVITA ESTEVES, CPPSE; JEFERSON FERREIRA DA FONSECA, CNPC; MARIA EMILIA FRANCO OLIVEIRA, São Paulo State University. |
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Título: |
Luteal tissue characteristics of Morada Nova ewes with hCG application 7.5 days after the end of estrus synchronization protocol in the breeding season. |
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Ano de publicação: |
2024 |
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Fonte/Imprenta: |
Animal Reproduction Science, v. 261, 107396, Feb. 2024. |
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DOI: |
https://doi.org/10.1016/j.anireprosci.2023.107396 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Results with the use of hCG after synchronization protocol are still inconsistent, which may vary according to breed, season, day of application and dose of the drug used. The aim of the present study was to evaluate the functionality of luteal tissue and ovarian perfusion after hCG treatment during early luteal phase. Estrus-synchronized ewes were randomly assigned to receive i.m. injection of 300 IU of hCG (G-hCG; n = 40) or 1 mL of saline (G-Control; n = 32) on Day 7.5 after progesterone withdrawal. Ultrasonographic evaluations of the ovaries and ovarian and iliac arteries were performed on Days 7.5, 10.5, 13.5, and 21.5. The accessory corpus luteum (aCL) formation rate was 52.5% for G-hCG. There was interaction (p > 0.05) for treatment (G-hCG and G-Control), days (7.5, 10.5, 13.5 and 21.5) and PD (Pregnant and Non-pregnant) for the variables of biometric characteristics of the corpus luteum B-Mode and Color Doppler on days 7.5, 10.5, 13.5 and 21.5. There was no difference (p > 0.05) for pregnancy rates and mean fetuses per ewe between the treatment groups. It is concluded that the application of hCG 7.5 days after the hormonal protocol in Morada Nova ewes in a breeding season is efficient in inducing aCL formation and increasing luteal tissue biometry. However, there was no effect on pregnancy rate. |
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Palavras-Chave: |
Accessory corpora lutea; Arterial velocimetric indices; HCG; Luteal color Doppler signs; Non-breeding; Ovarian ultrasound. |
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Thesaurus NAL: |
Breeding; Chorionic gonadotropins; Estrus synchronization; Ewes; Females; Males; Pharmacology; Pregnancy rate; Progesterone; Reproduction; Reproductive efficiency; Seasons; Sheep. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02717naa a2200457 a 4500
001 2160892
005 2024-03-06
008 2024 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.anireprosci.2023.107396$2DOI
100 1 $aGONÇALVES, J. D.
245 $aLuteal tissue characteristics of Morada Nova ewes with hCG application 7.5 days after the end of estrus synchronization protocol in the breeding season.$h[electronic resource]
260 $c2024
520 $aAbstract: Results with the use of hCG after synchronization protocol are still inconsistent, which may vary according to breed, season, day of application and dose of the drug used. The aim of the present study was to evaluate the functionality of luteal tissue and ovarian perfusion after hCG treatment during early luteal phase. Estrus-synchronized ewes were randomly assigned to receive i.m. injection of 300 IU of hCG (G-hCG; n = 40) or 1 mL of saline (G-Control; n = 32) on Day 7.5 after progesterone withdrawal. Ultrasonographic evaluations of the ovaries and ovarian and iliac arteries were performed on Days 7.5, 10.5, 13.5, and 21.5. The accessory corpus luteum (aCL) formation rate was 52.5% for G-hCG. There was interaction (p > 0.05) for treatment (G-hCG and G-Control), days (7.5, 10.5, 13.5 and 21.5) and PD (Pregnant and Non-pregnant) for the variables of biometric characteristics of the corpus luteum B-Mode and Color Doppler on days 7.5, 10.5, 13.5 and 21.5. There was no difference (p > 0.05) for pregnancy rates and mean fetuses per ewe between the treatment groups. It is concluded that the application of hCG 7.5 days after the hormonal protocol in Morada Nova ewes in a breeding season is efficient in inducing aCL formation and increasing luteal tissue biometry. However, there was no effect on pregnancy rate.
650 $aBreeding
650 $aChorionic gonadotropins
650 $aEstrus synchronization
650 $aEwes
650 $aFemales
650 $aMales
650 $aPharmacology
650 $aPregnancy rate
650 $aProgesterone
650 $aReproduction
650 $aReproductive efficiency
650 $aSeasons
650 $aSheep
653 $aAccessory corpora lutea
653 $aArterial velocimetric indices
653 $aHCG
653 $aLuteal color Doppler signs
653 $aNon-breeding
653 $aOvarian ultrasound
700 1 $aVERGANI, G. B.
700 1 $aRODRIGUES, J. N. D.
700 1 $aDIAS, J. H.
700 1 $aPEREIRA, V. S. do A.
700 1 $aGARCIA, A. R.
700 1 $aESTEVES, S. N.
700 1 $aFONSECA, J. F. da
700 1 $aOLIVEIRA, M. E. F.
773 $tAnimal Reproduction Science$gv. 261, 107396, Feb. 2024.
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