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Registro Completo |
Biblioteca(s): |
Embrapa Cerrados. |
Data corrente: |
10/12/2004 |
Data da última atualização: |
28/10/2009 |
Autoria: |
REIS JÚNIOR, F. B. dos; TEIXEIRA, K. R. dos S.; URQUIAGA, S.; REIS, V. M. |
Título: |
Associação de bactérias promotoras de crescimento de plantas do gênero Azospirillum com diferentes espécies de brachiaria. |
Ano de publicação: |
2003 |
Fonte/Imprenta: |
Planaltina, DF: Embrapa Cerrados, 2003. |
Páginas: |
52 p. |
Série: |
(Embrapa Cerrados. Documentos, 81). |
Idioma: |
Português |
Conteúdo: |
ABSTRACT: The limitation of nitrogen is considered one of the most important factors to the pastures degradation. However there are evidences that pastures formed by some species of the genus Brachiaria could be benefit with the biological nitrogen fixation process (BNF), guaranteeing to these pastures higher longevity. The diazotrophic bacteria founded in association with these forage grasses were mainly species from the Azospirillum genus. The associations between these microrganisms and the plants are generally conditioned to the vegetation, therefore is possible that different genotypes of Brachiaria exercise a selective efffect on the populations of these, what could result in different BNF contributions. It was objectified to establish the influence of the Brachiaria species, pasture management and seasonal variations on the bacteria populations from the Azospirillum genus associated with the roots of these plants. Different pastures (B.humidicola, B. decumbens and B. brizantha) were implanted in areas of the Cerrado ecosystem and of the Atlantic Forest. Two management systems with different stocking rates (higher and lower) were evaluated. The collects of plant samples from each experimental treatment were accomplished in different times of the year. For the isolation and qualification of the diazotrophic bacteria traditional techniques were utilised with the use of semi-specific and semi-solid culture media without nitrogen. A. lipoferum, A. brasiliense and A. amazonense were isolated from root samples of the three analysed Brachiaria species. The estimates of the bacterial populations from these species varied from 10(elevado a 3) - 10 (elevado a 7) cells. g. of roots. In the samples of the Cerrado ecosystem, the collect time presented significant effects on the population of these bacteria. The data from the Atlantic forest region experiment showed that plants of Brachiaria from different species and pastures under different stocking rates can present different populations numbers of Azospirillum spp. associated to its roots. MenosABSTRACT: The limitation of nitrogen is considered one of the most important factors to the pastures degradation. However there are evidences that pastures formed by some species of the genus Brachiaria could be benefit with the biological nitrogen fixation process (BNF), guaranteeing to these pastures higher longevity. The diazotrophic bacteria founded in association with these forage grasses were mainly species from the Azospirillum genus. The associations between these microrganisms and the plants are generally conditioned to the vegetation, therefore is possible that different genotypes of Brachiaria exercise a selective efffect on the populations of these, what could result in different BNF contributions. It was objectified to establish the influence of the Brachiaria species, pasture management and seasonal variations on the bacteria populations from the Azospirillum genus associated with the roots of these plants. Different pastures (B.humidicola, B. decumbens and B. brizantha) were implanted in areas of the Cerrado ecosystem and of the Atlantic Forest. Two management systems with different stocking rates (higher and lower) were evaluated. The collects of plant samples from each experimental treatment were accomplished in different times of the year. For the isolation and qualification of the diazotrophic bacteria traditional techniques were utilised with the use of semi-specific and semi-solid culture media without nitrogen. A. lipoferum, A. brasiliense and A. amazon... Mostrar Tudo |
Palavras-Chave: |
Degredação. |
Thesagro: |
Bactéria; Brachiaria; Fixação de Nitrogênio; Microbiologia do Solo; Pastagem. |
Thesaurus Nal: |
Azospirillum amazonense; degradation; microbiology; nitrogen fixation; pastures; soil. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CPAC-2009/25011/1/doc_81.pdf
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Marc: |
LEADER 02982nam a2200313 a 4500 001 1567997 005 2009-10-28 008 2003 bl uuuu 00u1 u #d 100 1 $aREIS JÚNIOR, F. B. dos 245 $aAssociação de bactérias promotoras de crescimento de plantas do gênero Azospirillum com diferentes espécies de brachiaria. 260 $aPlanaltina, DF: Embrapa Cerrados$c2003 300 $a52 p. 490 $a(Embrapa Cerrados. Documentos, 81). 520 $aABSTRACT: The limitation of nitrogen is considered one of the most important factors to the pastures degradation. However there are evidences that pastures formed by some species of the genus Brachiaria could be benefit with the biological nitrogen fixation process (BNF), guaranteeing to these pastures higher longevity. The diazotrophic bacteria founded in association with these forage grasses were mainly species from the Azospirillum genus. The associations between these microrganisms and the plants are generally conditioned to the vegetation, therefore is possible that different genotypes of Brachiaria exercise a selective efffect on the populations of these, what could result in different BNF contributions. It was objectified to establish the influence of the Brachiaria species, pasture management and seasonal variations on the bacteria populations from the Azospirillum genus associated with the roots of these plants. Different pastures (B.humidicola, B. decumbens and B. brizantha) were implanted in areas of the Cerrado ecosystem and of the Atlantic Forest. Two management systems with different stocking rates (higher and lower) were evaluated. The collects of plant samples from each experimental treatment were accomplished in different times of the year. For the isolation and qualification of the diazotrophic bacteria traditional techniques were utilised with the use of semi-specific and semi-solid culture media without nitrogen. A. lipoferum, A. brasiliense and A. amazonense were isolated from root samples of the three analysed Brachiaria species. The estimates of the bacterial populations from these species varied from 10(elevado a 3) - 10 (elevado a 7) cells. g. of roots. In the samples of the Cerrado ecosystem, the collect time presented significant effects on the population of these bacteria. The data from the Atlantic forest region experiment showed that plants of Brachiaria from different species and pastures under different stocking rates can present different populations numbers of Azospirillum spp. associated to its roots. 650 $aAzospirillum amazonense 650 $adegradation 650 $amicrobiology 650 $anitrogen fixation 650 $apastures 650 $asoil 650 $aBactéria 650 $aBrachiaria 650 $aFixação de Nitrogênio 650 $aMicrobiologia do Solo 650 $aPastagem 653 $aDegredação 700 1 $aTEIXEIRA, K. R. dos S. 700 1 $aURQUIAGA, S. 700 1 $aREIS, V. M.
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Embrapa Cerrados (CPAC) |
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Registro Completo
Biblioteca(s): |
Embrapa Semiárido. |
Data corrente: |
21/11/2019 |
Data da última atualização: |
21/11/2019 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
SANTOS, F. M. dos; ARAUJO, G. G. L. de; SOUZA, L. L. de; YAMAMOTO, S. M.; QUEIROZ, M. A. A.; LANNA, D. P. D.; MORAES, S. A. de. |
Afiliação: |
Fernanda Maria dos Santos, UFBA; GHERMAN GARCIA LEAL DE ARAUJO, CPATSA; Larissa Lopes de Souza, UNIVASF; Sandra Mari Yamamoto, UNIVASF; Mário Adriano Ávila Queiroz, UNIVASF; Dante Pazzanese Duarte Lanna, ESALQ; SALETE ALVES DE MORAES, CPATSA. |
Título: |
Impact of water restriction periods on carcass traits and meat quality of feedlot lambs in the Brazilian semi-arid region. |
Ano de publicação: |
2019 |
Fonte/Imprenta: |
Meat Science, v. 156, p. 196-204, 2019. |
DOI: |
10.1016/j.meatsci.2019.05.033 |
Idioma: |
Inglês |
Conteúdo: |
Water restriction periods were evaluated in crossbred lambs (n=32) distributed in one of four treatments: without water restriction, water restriction for 24, 48 and 72 h. The water restriction for 72 h reduced the water and dry matter intakes, body weight at slaughter and hot and cold carcass yields. Water restriction did not affect the weight of the carcass cuts and the chemical composition of the meat. The fatty acid EPA increased and DHA reduced with increasing water restriction period. There was an increasing linear effect for meat shear force, with less force (30.5 N/cm2) for sheep meat without water restriction and higher force (45.8 N/cm2) for those with water restriction for 72 h. The period of 24 h of water restriction was the one that promoted the highest similarities in the characteristics assessed to those in animals receiving water ad libitum. Therefore, water restriction periods should not exceed 24 h for feedlot animals in situations of severe water shortage. |
Palavras-Chave: |
Ácidos graxos; Escassez de água; Qualidade da carne; Semiárido. |
Thesagro: |
Carcaça; Confinamento; Cordeiro; Músculo. |
Thesaurus NAL: |
Lambs. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/205098/1/Impact-of-water-restriction-periods-2019.pdf
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Marc: |
LEADER 01904naa a2200313 a 4500 001 2114764 005 2019-11-21 008 2019 bl uuuu u00u1 u #d 024 7 $a10.1016/j.meatsci.2019.05.033$2DOI 100 1 $aSANTOS, F. M. dos 245 $aImpact of water restriction periods on carcass traits and meat quality of feedlot lambs in the Brazilian semi-arid region.$h[electronic resource] 260 $c2019 520 $aWater restriction periods were evaluated in crossbred lambs (n=32) distributed in one of four treatments: without water restriction, water restriction for 24, 48 and 72 h. The water restriction for 72 h reduced the water and dry matter intakes, body weight at slaughter and hot and cold carcass yields. Water restriction did not affect the weight of the carcass cuts and the chemical composition of the meat. The fatty acid EPA increased and DHA reduced with increasing water restriction period. There was an increasing linear effect for meat shear force, with less force (30.5 N/cm2) for sheep meat without water restriction and higher force (45.8 N/cm2) for those with water restriction for 72 h. The period of 24 h of water restriction was the one that promoted the highest similarities in the characteristics assessed to those in animals receiving water ad libitum. Therefore, water restriction periods should not exceed 24 h for feedlot animals in situations of severe water shortage. 650 $aLambs 650 $aCarcaça 650 $aConfinamento 650 $aCordeiro 650 $aMúsculo 653 $aÁcidos graxos 653 $aEscassez de água 653 $aQualidade da carne 653 $aSemiárido 700 1 $aARAUJO, G. G. L. de 700 1 $aSOUZA, L. L. de 700 1 $aYAMAMOTO, S. M. 700 1 $aQUEIROZ, M. A. A. 700 1 $aLANNA, D. P. D. 700 1 $aMORAES, S. A. de 773 $tMeat Science$gv. 156, p. 196-204, 2019.
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