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Registro Completo |
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Biblioteca(s): |
Embrapa Trigo; Embrapa Unidades Centrais. |
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Data corrente: |
25/06/2003 |
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Data da última atualização: |
17/08/2021 |
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Autoria: |
GOLIK, S. I.; CHIDICHIMO, H. O.; PÉREZ, D.; PANE, L. |
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Título: |
Acumulación, removilización, absorción postantesis y eficiencia de utilización de nitrógeno en trigo bajo diferentes labranzas y fertilizaciones. |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 38, n. 5, p. 619-626, maio 2003. |
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Idioma: |
Espanhol |
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Conteúdo: |
El objetivo de este trabajo fue analizar la acumulación, removilización, absorción postantesis y la eficiencia en la utilización de N bajo dos sistemas de labranza (reja y cincel) y diferentes tipos de fertilización, en los cultivares de trigo pan Buck Pronto y Buck Charrúa. Los tratamientos de fertilización fueron: testigo sin el agregado de N, aplicación de 90 kg ha-1 de N como urea a la siembra, aplicación de 90 kg ha-1 de N como nitrato de amonio calcáreo a la siembra y aplicación de N como urea y como nitrato de amonio calcáreo en dosis de 45 kg ha-1 a la siembra más 45 kg ha-1 a fin de macollaje, respectivamente. Se encontraron diferencias en el N acumulado entre sistemas de labranzas; con cincel se acumuló 18 kg ha-1 más que bajo reja, pero esto no se tradujo en el porcentaje de N contribuido al grano por removilización ni por absorción postantesis. La fertilización aumentó el N acumulado en un promedio de 50 kg ha-1. A su vez provocó un aumento en la contribución al grano del N removilizado, pero no mejoró el aporte del N absorbido postantesis, ni aún en la aplicación en dos momentos. Los cultivares presentaron diferencias en el N acumulado y en el porcentaje aportado al grano por removilización y absorción postantesis. La eficiencia de utilización del N dependió de la labranza y de la fertilización. |
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Palavras-Chave: |
chisel ploughs; cincel; Cultivar; cultivares; fertilización; fertilization; mouldboard ploughs; reja y vertedera. |
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Thesagro: |
Triticum Aestivum. |
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Thesaurus Nal: |
cultivars; wheat. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CNPT-2010/11168/1/v38n5-619.pdf
https://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE/24588/1/v38n5_619.pdf
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Marc: |
LEADER 02219naa a2200289 a 4500
001 1822951
005 2021-08-17
008 2003 bl uuuu u00u1 u #d
100 1 $aGOLIK, S. I.
245 $aAcumulación, removilización, absorción postantesis y eficiencia de utilización de nitrógeno en trigo bajo diferentes labranzas y fertilizaciones.
260 $c2003
520 $aEl objetivo de este trabajo fue analizar la acumulación, removilización, absorción postantesis y la eficiencia en la utilización de N bajo dos sistemas de labranza (reja y cincel) y diferentes tipos de fertilización, en los cultivares de trigo pan Buck Pronto y Buck Charrúa. Los tratamientos de fertilización fueron: testigo sin el agregado de N, aplicación de 90 kg ha-1 de N como urea a la siembra, aplicación de 90 kg ha-1 de N como nitrato de amonio calcáreo a la siembra y aplicación de N como urea y como nitrato de amonio calcáreo en dosis de 45 kg ha-1 a la siembra más 45 kg ha-1 a fin de macollaje, respectivamente. Se encontraron diferencias en el N acumulado entre sistemas de labranzas; con cincel se acumuló 18 kg ha-1 más que bajo reja, pero esto no se tradujo en el porcentaje de N contribuido al grano por removilización ni por absorción postantesis. La fertilización aumentó el N acumulado en un promedio de 50 kg ha-1. A su vez provocó un aumento en la contribución al grano del N removilizado, pero no mejoró el aporte del N absorbido postantesis, ni aún en la aplicación en dos momentos. Los cultivares presentaron diferencias en el N acumulado y en el porcentaje aportado al grano por removilización y absorción postantesis. La eficiencia de utilización del N dependió de la labranza y de la fertilización.
650 $acultivars
650 $awheat
650 $aTriticum Aestivum
653 $achisel ploughs
653 $acincel
653 $aCultivar
653 $acultivares
653 $afertilización
653 $afertilization
653 $amouldboard ploughs
653 $areja y vertedera
700 1 $aCHIDICHIMO, H. O.
700 1 $aPÉREZ, D.
700 1 $aPANE, L.
773 $tPesquisa Agropecuária Brasileira, Brasília, DF$gv. 38, n. 5, p. 619-626, maio 2003.
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Registro original: |
Embrapa Trigo (CNPT) |
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Biblioteca |
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Origem |
Tipo/Formato |
Classificação |
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Registro |
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Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
12/12/2021 |
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Data da última atualização: |
12/12/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
SILVA, J. D. da; VIANA, M. P.; CALADO, L. G. L. P.; LIMA, A. M. C.; ALVES, F. S. F.; PINHEIRO, R. R.; COSTA, D. F. da; SILVA, G. C. P. da; AZEVEDO, S. S. de; ALVES, C. J. |
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Afiliação: |
JOSÉ DÊVEDE DA SILVA, Federal University of Campina Grande (UFCG) - Patos, PB, Brazil.; MAIRA PORTO VIANA, Federal University of Campina Grande (UFCG) - Patos, PB, Brazil.; LUCAS GONZALES LIMA PEREIRA CALADO, São Paulo State University (UNESP) - Presidente Prudente, SP, Brazil.; ANA MILENA CÉSAR LIMA, Federal University of Piauí (UFPI) - Teresina, PI, Brazil; FRANCISCO SELMO FERNANDES ALVES, CNPC; RAYMUNDO RIZALDO PINHEIRO, CNPC; DIEGO FIGUEIREDO DA COSTA, Federal University of Paraíba (UFPB) - Areia, PB, Brazil; GLAUCENYRA CECÍLIA PINHEIRO DA SILVA, University of Cuiabá (UNIC) - Cuiabá, MT, Brazil.; SÉRGIO SANTOS DE AZEVEDO, Federal University of Campina Grande (UFCG) - Patos, PB, Brazil.; CLEBERT JOSE ALVES, Federal University of Campina Grande (UFCG) - Patos, PB, Brazil. |
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Título: |
Spatial distribution of serologically reactive sheep to Leptospira spp. in the northeast region of Brazil. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Acta Scientiae Veterinariae, v. 49, Pub.1837, 2021. |
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DOI: |
https://doi.org/10.22456/1679-9216.117519 |
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Idioma: |
Inglês |
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Conteúdo: |
Background: Considering the importance of leptospirosis in sheep farming and public health and the significance of identifying which serogroups circulate in sheep within each region, the objective of this study was to determine the seroprevalence and spatial distribution of the most frequent serogroups causing infection by Leptospira sp. in ovine herds in the Northeast region of Brazil. Materials, Methods & Results: Blood samples were collected from 4197 sheep from 229 herds in 7 Northeastern States. Sera were analyzed via microscopic agglutination test (MAT). The frequency of seroreactive sheep for Leptospira sp. was 14.06%. The states of Alagoas, Ceará, Paraíba, Piauí, Rio Grande do Norte, and Sergipe, located in the Caatinga biome, had the highest frequencies of serologically reactive sheep, and Maranhão, in the Cerrado biome, had the lowest frequency. The most frequent serogroups were Autumnalis (19.49%), Australis (15.76%) and Serjoe (14.41%). In the states of Ceará, Paraíba, Rio Grande do Norte, and Sergipe, 100% of their municipalities had at least one seroreactive animal. The highest frequencies of seropositive animals were found in the municipalities of União (50%), Passagem (49.06%), Canindé (48.89%), Igaci (28.95%), Gararu (31.2%), Pirapemas (17.5%), and Angicos (16%) located in the states of Piauí, Paraíba, Ceará, Alagoas, Sergipe, Maranhão and Rio Grande do Norte, respectively. Discussion: The animal-level prevalence (14.06%) obtained in the present study is significant, especially considering the rustic nature of the species and the adverse conditions of the region for the infectious agent. In semi-arid conditions, it has been suggested that perhaps sheep do not seroconvert detectable titers on MAT with a cut-off point of 1:100. It is important to highlight that the ovine population in the Northeast region of Brazil is composed of mixed animals, which have been considered more resistant to infection by Leptospira spp. Also, environmental factors hostile to the survival of the infectious agent in the studied region should be taken into consideration, since they may have influenced the seropositive animal-level prevalence. A noteworthy variation was observed in agglutinin titers, which ranged from 100 to 1,600, where 80.2% of the positive samples had titers ? 200. It is important to highlight that more elevated titers (? 400) were obtained in all seven states, which may suggest an acute infection caused by a non-adapted serovar, indicating that preventive and control measures focused on possible infection sources for sheep should be adopted. Although some states showed the same serogroups as the most frequent, a variety of serogroups was observed in municipalities, which may indicate different sources of infection, whether interspecies, intraspecies, or via alternative routes of transmission in semi-arid conditions, such as venereal. This indicates that even though sheep are more resistant to infection, they become exposed due to the environment or management conditions. As such, identification, isolation, and treatment of the affected animals are alternative measures recommended for prevention and control of leptospirosis in sheep in the semi-arid region. It is evident that despite the lack of rain observed in the last decade in the Northeast region of Brazil, which prevented the formation of favorable environments for the presence of Leptospira, the infectious agent remains among the sheep, as well as other production and wild animals in the region. Some factors may be contributing to this scenario, such as the fact that sheep farming in the region is characterized mainly by subsistence systems, where veterinary assistance and adequate sanitary management are absent, thus increasing the possibility of contact with Leptospira. MenosBackground: Considering the importance of leptospirosis in sheep farming and public health and the significance of identifying which serogroups circulate in sheep within each region, the objective of this study was to determine the seroprevalence and spatial distribution of the most frequent serogroups causing infection by Leptospira sp. in ovine herds in the Northeast region of Brazil. Materials, Methods & Results: Blood samples were collected from 4197 sheep from 229 herds in 7 Northeastern States. Sera were analyzed via microscopic agglutination test (MAT). The frequency of seroreactive sheep for Leptospira sp. was 14.06%. The states of Alagoas, Ceará, Paraíba, Piauí, Rio Grande do Norte, and Sergipe, located in the Caatinga biome, had the highest frequencies of serologically reactive sheep, and Maranhão, in the Cerrado biome, had the lowest frequency. The most frequent serogroups were Autumnalis (19.49%), Australis (15.76%) and Serjoe (14.41%). In the states of Ceará, Paraíba, Rio Grande do Norte, and Sergipe, 100% of their municipalities had at least one seroreactive animal. The highest frequencies of seropositive animals were found in the municipalities of União (50%), Passagem (49.06%), Canindé (48.89%), Igaci (28.95%), Gararu (31.2%), Pirapemas (17.5%), and Angicos (16%) located in the states of Piauí, Paraíba, Ceará, Alagoas, Sergipe, Maranhão and Rio Grande do Norte, respectively. Discussion: The animal-level prevalence (14.06%) obtained in the present study is sig... Mostrar Tudo |
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Palavras-Chave: |
Brasil; Região Nordeste; Semiárido; Zoonosis. |
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Thesagro: |
Bactéria; Doença Animal; Leptospirose; Ovino; Zoonose. |
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Thesaurus NAL: |
Bacterial infections; Brazil; Infectious diseases; Leptospirosis; Semiarid zones; Sheep diseases; Small ruminants. |
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Categoria do assunto: |
H Saúde e Patologia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/228983/1/CNPC-2021-Art-84.pdf
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Marc: |
LEADER 05040naa a2200433 a 4500
001 2137617
005 2021-12-12
008 2021 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.22456/1679-9216.117519$2DOI
100 1 $aSILVA, J. D. da
245 $aSpatial distribution of serologically reactive sheep to Leptospira spp. in the northeast region of Brazil.$h[electronic resource]
260 $c2021
520 $aBackground: Considering the importance of leptospirosis in sheep farming and public health and the significance of identifying which serogroups circulate in sheep within each region, the objective of this study was to determine the seroprevalence and spatial distribution of the most frequent serogroups causing infection by Leptospira sp. in ovine herds in the Northeast region of Brazil. Materials, Methods & Results: Blood samples were collected from 4197 sheep from 229 herds in 7 Northeastern States. Sera were analyzed via microscopic agglutination test (MAT). The frequency of seroreactive sheep for Leptospira sp. was 14.06%. The states of Alagoas, Ceará, Paraíba, Piauí, Rio Grande do Norte, and Sergipe, located in the Caatinga biome, had the highest frequencies of serologically reactive sheep, and Maranhão, in the Cerrado biome, had the lowest frequency. The most frequent serogroups were Autumnalis (19.49%), Australis (15.76%) and Serjoe (14.41%). In the states of Ceará, Paraíba, Rio Grande do Norte, and Sergipe, 100% of their municipalities had at least one seroreactive animal. The highest frequencies of seropositive animals were found in the municipalities of União (50%), Passagem (49.06%), Canindé (48.89%), Igaci (28.95%), Gararu (31.2%), Pirapemas (17.5%), and Angicos (16%) located in the states of Piauí, Paraíba, Ceará, Alagoas, Sergipe, Maranhão and Rio Grande do Norte, respectively. Discussion: The animal-level prevalence (14.06%) obtained in the present study is significant, especially considering the rustic nature of the species and the adverse conditions of the region for the infectious agent. In semi-arid conditions, it has been suggested that perhaps sheep do not seroconvert detectable titers on MAT with a cut-off point of 1:100. It is important to highlight that the ovine population in the Northeast region of Brazil is composed of mixed animals, which have been considered more resistant to infection by Leptospira spp. Also, environmental factors hostile to the survival of the infectious agent in the studied region should be taken into consideration, since they may have influenced the seropositive animal-level prevalence. A noteworthy variation was observed in agglutinin titers, which ranged from 100 to 1,600, where 80.2% of the positive samples had titers ? 200. It is important to highlight that more elevated titers (? 400) were obtained in all seven states, which may suggest an acute infection caused by a non-adapted serovar, indicating that preventive and control measures focused on possible infection sources for sheep should be adopted. Although some states showed the same serogroups as the most frequent, a variety of serogroups was observed in municipalities, which may indicate different sources of infection, whether interspecies, intraspecies, or via alternative routes of transmission in semi-arid conditions, such as venereal. This indicates that even though sheep are more resistant to infection, they become exposed due to the environment or management conditions. As such, identification, isolation, and treatment of the affected animals are alternative measures recommended for prevention and control of leptospirosis in sheep in the semi-arid region. It is evident that despite the lack of rain observed in the last decade in the Northeast region of Brazil, which prevented the formation of favorable environments for the presence of Leptospira, the infectious agent remains among the sheep, as well as other production and wild animals in the region. Some factors may be contributing to this scenario, such as the fact that sheep farming in the region is characterized mainly by subsistence systems, where veterinary assistance and adequate sanitary management are absent, thus increasing the possibility of contact with Leptospira.
650 $aBacterial infections
650 $aBrazil
650 $aInfectious diseases
650 $aLeptospirosis
650 $aSemiarid zones
650 $aSheep diseases
650 $aSmall ruminants
650 $aBactéria
650 $aDoença Animal
650 $aLeptospirose
650 $aOvino
650 $aZoonose
653 $aBrasil
653 $aRegião Nordeste
653 $aSemiárido
653 $aZoonosis
700 1 $aVIANA, M. P.
700 1 $aCALADO, L. G. L. P.
700 1 $aLIMA, A. M. C.
700 1 $aALVES, F. S. F.
700 1 $aPINHEIRO, R. R.
700 1 $aCOSTA, D. F. da
700 1 $aSILVA, G. C. P. da
700 1 $aAZEVEDO, S. S. de
700 1 $aALVES, C. J.
773 $tActa Scientiae Veterinariae$gv. 49, Pub.1837, 2021.
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Embrapa Caprinos e Ovinos (CNPC) |
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