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Registro Completo |
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
27/08/1997 |
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Data da última atualização: |
27/08/1997 |
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Autoria: |
PRISCO, J. T. |
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Título: |
Possibilidades de exploracao de lavouras xerofilas no semi-arido brasileiro. |
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Ano de publicação: |
1986 |
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Fonte/Imprenta: |
Pesquisa Agropecuaria Brasileira, Brasilia, v.21, n.4, p.333-342, abr. 1986. |
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Idioma: |
Português |
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Conteúdo: |
Neste trabalho discutem-se as possibilidades de domesticacao de xerofitas nativas com vistas a adocao das chamadas "lavouras xerofilas" para o tropico semi-arido brasileiro. A luz de informacoes e conhecimento existentes na literatura sobre os mecanismos morfofisiologicos de resistencia a seca e de seus efeitos na produtividade vegetal, demonstra-se que a domesticacao de xerofitas nativas e questionavel. Recomendam-se a selecao e o melhoramento de especies cultivadas que ja possuem algumas caracteristicas de adaptabilidade a seca, bem como o desenvolvimento de pesquisas que possibilitem estabelecer praticas de manejo das culturas, do solo e da agua, que sejam mais adequadas as condicoes do tropico semi-arido brasileiro. |
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Palavras-Chave: |
Domesticacao de xerofitas; Lavouras xerofilas; Mecanismo de resistencia a seca; Tolerancia a seca; Xerofitismo. |
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Thesagro: |
Resistência a Seca; Seca. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01349naa a2200205 a 4500
001 1104315
005 1997-08-27
008 1986 bl uuuu u00u1 u #d
100 1 $aPRISCO, J. T.
245 $aPossibilidades de exploracao de lavouras xerofilas no semi-arido brasileiro.
260 $c1986
520 $aNeste trabalho discutem-se as possibilidades de domesticacao de xerofitas nativas com vistas a adocao das chamadas "lavouras xerofilas" para o tropico semi-arido brasileiro. A luz de informacoes e conhecimento existentes na literatura sobre os mecanismos morfofisiologicos de resistencia a seca e de seus efeitos na produtividade vegetal, demonstra-se que a domesticacao de xerofitas nativas e questionavel. Recomendam-se a selecao e o melhoramento de especies cultivadas que ja possuem algumas caracteristicas de adaptabilidade a seca, bem como o desenvolvimento de pesquisas que possibilitem estabelecer praticas de manejo das culturas, do solo e da agua, que sejam mais adequadas as condicoes do tropico semi-arido brasileiro.
650 $aResistência a Seca
650 $aSeca
653 $aDomesticacao de xerofitas
653 $aLavouras xerofilas
653 $aMecanismo de resistencia a seca
653 $aTolerancia a seca
653 $aXerofitismo
773 $tPesquisa Agropecuaria Brasileira, Brasilia$gv.21, n.4, p.333-342, abr. 1986.
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Registro original: |
Embrapa Unidades Centrais (AI-SEDE) |
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Registro Completo
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
09/11/2018 |
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Data da última atualização: |
09/11/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 2 |
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Autoria: |
VOLLÚ, R. E.; COTTA, S. R.; JURELEVICIUS, D.; LEITE, D. C. de A.; PARENTE, C. E. T.; MALM, O.; MARTINS, T. C.; RESENDE, A. V. de; MARRIEL, I. E.; SELDIN, L. |
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Afiliação: |
Renata Estebanez Vollú, Universidade Federal do Rio de Janeiro; Simone Raposo Cotta, Escola Superior de Agricultura Luiz de Queiroz; Diogo Jurelevicius, Universidade Federal do Rio de Janeiro; Deborah Catharine de Assis Leite, Universidade Federal do Rio de Janeiro; Cláudio Ernesto Taveira Parente, Universidade Federal do Rio de Janeiro; Olaf Malm, Universidade Federal do Rio de Janeiro; Denize Carvalho Martins, Universidade Federal de Viçosa; ALVARO VILELA DE RESENDE, CNPMS; IVANILDO EVODIO MARRIEL, CNPMS; Lucy Seldin, Universidade Federal do Rio de Janeiro. |
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Título: |
Response of the bacterial communities associated with maize rhizosphere to poultry litter as an organomineral fertilizer. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Frontiers in Environmental Science, v. 6, article 118, 2018. |
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DOI: |
10.3389/fenvs.2018.00118 |
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Idioma: |
Inglês |
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Conteúdo: |
Maize is an important food source worldwide and is of considerable industrial importance. Low maize yields are mostly due to low soil fertility, so expensive mineral fertilizers are often used to offset the lack of nutrients. Poultry litter (PL) is one of the most valuable and phosphorous-rich animal wastes. However, PL usually contains veterinary antibiotic residues, particularly fluoroquinolones (FQs), which may alter soil microorganism diversity and resistance patterns. In this study, we aimed to understand the impact of applying mineral (triple superphosphate?STP) or organomineral (STP with PL and reactive Bayovar phosphate with PL) fertilizers (130 or 260 kg/ha of total P2O5) on the structure and composition of the soil bacteriome and on phosphate-mineralizing bacteria associated with the maize rhizosphere. Maize plants were sampled at 60 and 90 days after sowing and a clear rhizosphere effect was observed in all samples. No specific groups of bacterial genera predominated (>3% relative abundance) according to the different fertilizer treatments and most of the genera were shared among samples. Multivariate analyses of 16S rRNA sequences revealed clear clustering based on sampling time and distinct separation from bulk soil samples. Abundances of phosphate-mineralizing bacteria varied depending on the sampling time.We observed a positive effect on phytase activity under the 260 kg STP with PL treatment. Although the FQ enrofloxacin and its main metabolite ciprofloxacin were detected in PL, their concentrations in fertilized soils were below quantification thresholds. Quinolone resistance genes were not detected in the maize rhizosphere or bulk soil. Together, these results suggest that the rhizosphere effect, plant age and applied amounts of fertilizer are more influential on bacterial communities than the type of fertilizer used. Thus, application of PL as an organomineral fertilizer does not appear to have extensive impacts on the bacterial diversity of maize rhizosphere, so it could be an excellent option for enhancing maize production. MenosMaize is an important food source worldwide and is of considerable industrial importance. Low maize yields are mostly due to low soil fertility, so expensive mineral fertilizers are often used to offset the lack of nutrients. Poultry litter (PL) is one of the most valuable and phosphorous-rich animal wastes. However, PL usually contains veterinary antibiotic residues, particularly fluoroquinolones (FQs), which may alter soil microorganism diversity and resistance patterns. In this study, we aimed to understand the impact of applying mineral (triple superphosphate?STP) or organomineral (STP with PL and reactive Bayovar phosphate with PL) fertilizers (130 or 260 kg/ha of total P2O5) on the structure and composition of the soil bacteriome and on phosphate-mineralizing bacteria associated with the maize rhizosphere. Maize plants were sampled at 60 and 90 days after sowing and a clear rhizosphere effect was observed in all samples. No specific groups of bacterial genera predominated (>3% relative abundance) according to the different fertilizer treatments and most of the genera were shared among samples. Multivariate analyses of 16S rRNA sequences revealed clear clustering based on sampling time and distinct separation from bulk soil samples. Abundances of phosphate-mineralizing bacteria varied depending on the sampling time.We observed a positive effect on phytase activity under the 260 kg STP with PL treatment. Although the FQ enrofloxacin and its main metabolite ciprofloxacin ... Mostrar Tudo |
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Palavras-Chave: |
Cama de frango; Comunidade bacteriana; Fertilizante organomineral; Fluoroquinolona. |
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Thesagro: |
Milho; Rizosfera. |
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Categoria do assunto: |
S Ciências Biológicas |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/185677/1/Response-bacterial.pdf
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Marc: |
LEADER 03027naa a2200313 a 4500
001 2099062
005 2018-11-09
008 2018 bl uuuu u00u1 u #d
024 7 $a10.3389/fenvs.2018.00118$2DOI
100 1 $aVOLLÚ, R. E.
245 $aResponse of the bacterial communities associated with maize rhizosphere to poultry litter as an organomineral fertilizer.$h[electronic resource]
260 $c2018
520 $aMaize is an important food source worldwide and is of considerable industrial importance. Low maize yields are mostly due to low soil fertility, so expensive mineral fertilizers are often used to offset the lack of nutrients. Poultry litter (PL) is one of the most valuable and phosphorous-rich animal wastes. However, PL usually contains veterinary antibiotic residues, particularly fluoroquinolones (FQs), which may alter soil microorganism diversity and resistance patterns. In this study, we aimed to understand the impact of applying mineral (triple superphosphate?STP) or organomineral (STP with PL and reactive Bayovar phosphate with PL) fertilizers (130 or 260 kg/ha of total P2O5) on the structure and composition of the soil bacteriome and on phosphate-mineralizing bacteria associated with the maize rhizosphere. Maize plants were sampled at 60 and 90 days after sowing and a clear rhizosphere effect was observed in all samples. No specific groups of bacterial genera predominated (>3% relative abundance) according to the different fertilizer treatments and most of the genera were shared among samples. Multivariate analyses of 16S rRNA sequences revealed clear clustering based on sampling time and distinct separation from bulk soil samples. Abundances of phosphate-mineralizing bacteria varied depending on the sampling time.We observed a positive effect on phytase activity under the 260 kg STP with PL treatment. Although the FQ enrofloxacin and its main metabolite ciprofloxacin were detected in PL, their concentrations in fertilized soils were below quantification thresholds. Quinolone resistance genes were not detected in the maize rhizosphere or bulk soil. Together, these results suggest that the rhizosphere effect, plant age and applied amounts of fertilizer are more influential on bacterial communities than the type of fertilizer used. Thus, application of PL as an organomineral fertilizer does not appear to have extensive impacts on the bacterial diversity of maize rhizosphere, so it could be an excellent option for enhancing maize production.
650 $aMilho
650 $aRizosfera
653 $aCama de frango
653 $aComunidade bacteriana
653 $aFertilizante organomineral
653 $aFluoroquinolona
700 1 $aCOTTA, S. R.
700 1 $aJURELEVICIUS, D.
700 1 $aLEITE, D. C. de A.
700 1 $aPARENTE, C. E. T.
700 1 $aMALM, O.
700 1 $aMARTINS, T. C.
700 1 $aRESENDE, A. V. de
700 1 $aMARRIEL, I. E.
700 1 $aSELDIN, L.
773 $tFrontiers in Environmental Science$gv. 6, article 118, 2018.
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