Consulta: subjectFacets:"Nitrogen fixation"
Registros recuperados: 83
Data/hora: 03/06/2024 06:35:13

Asociación de cepas fijadoras de nitrógeno de vida libre, con recursos genéticos de pastos para zonas áridas.
Provedor de dados: 32
Autores: Plascencia Jiménez, Raúl.
Para evaluar microorganismos de la rizosfera de Bouteloua curtipendula (Michx.) Torr., se recolectó suelo de cinco localidades 1) Salinas, San Luis Potosí 2) Ejido, Jacalón, Salinas, San Luis Potosí; 3) Calera, Zacatecas; 4) Santa María del Oro, Durango y 5) Crucero La Zarca, Durango. La población de actinomicetos, bacterias y hongos, se estimó con diluciones seriadas (10-1 a 10-10). Los actinomicetos (AS), bacterias (BS) y hongos (HS) se estimaron con diluciones 10-3 a 10-5; 10-5 a 10-7; 10-2 a 10-4, respectivamente, con cinco repeticiones. Las siembras en placa se incubaron a 30 °C. Las unidades formadoras de colonias de bacterias (ufc) se cuantificaron a 24, 48 y 72 h; mientras que, para actinomicetos y hongos, las ufc se cuantificaron a 7, 8 y 9 d. En...
Palavras-chave: Bouteloua; Fijación de nitrógeno; Forraje; Inoculación; Nitrogen fixation; Forage; Inoculation; Ganadería; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/2139

Experimental and bioinformatic approaches for analyzing and visualizing cyanobacterial nitrogen and hydrogen metabolism
Provedor de dados: 69
Autores: Wünschiers,Röbbe; Axelsson,Rikard; Vellguth,Martin; Lindblad,Peter.
Many cyanobacteria are capable of utilizing light energy for nitrogen fixation. As a by-product of this nitrogenase mediated catalysis, hydrogen gas is produced. Several approaches to increase hydrogen production from cyanobacteria exist. Usually, these approaches are non-targeted. Here we exemplify how DNA-microarray based gene-expression analysis and bioinformatic visualization techniques can be used to analyze nitrogen and hydrogen metabolism from the filamentous, heterocyst forming cyanobacterium Nostoc PCC 7120. We analyzed the expression of 1249 genes from major metabolic categories under nitrogen fixing and non-nitrogen fixing growth. Of the selected genes, 494 show a more than 2-fold expression difference in the two conditions analyzed. Under...
Tipo: Journal article
Palavras-chave: Bioinformatics; Cyanobacteria; DNA-microarrays; Gene expression; Metabolic pathways; Nitrogen availability; Nitrogen fixation.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582007000400008

NON-SYMBIOTIC NITROGEN FIXATION, NET NITROGEN MINERALIZATION AND DENITRIFICATION IN EVERGREEN FORESTS OF CHILOÉ ISLAND, CHILE: A COMPARISON WITH OTHER TEMPERATE FORESTS
Provedor de dados: 73
Autores: Pérez,C.A.; Carmona,M.R.; Armesto,J.J.
Temperate forests in southern Chile offer unique opportunities for studying biogeochemical cycles in the absence of industrial air pollution. Here we compare three important fluxes of the nitrogen (N) cycle in temperate forests of southern Chile, non-symbiotic N fixation, net N mineralization and denitrification, with data from northern temperate forests more affected by air pollution. We studied five evergreen, old-growth forests and one second-growth forest in Chiloé Island, southern Chile. Non-symbiotic N fixation in the litter layer, mineral soil and coarse woody debris was estimated by the acetylene reduction technique. In situ net-N mineralization in the upper mineral soil layer was assessed by the buried bag method. Denitrification rates of mineral...
Tipo: Journal article
Palavras-chave: Denitrification; Nitrogen cycle; Nitrogen fixation; Temperate forests; Unpolluted forests.
Ano: 2003
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432003000100005

Plant growth-promoting bacteria as inoculants in agricultural soils
Provedor de dados: 74
Autores: Souza,Rocheli de; Ambrosini,Adriana; Passaglia,Luciane M.P.
Abstract Plant-microbe interactions in the rhizosphere are the determinants of plant health, productivity and soil fertility. Plant growth-promoting bacteria (PGPB) are bacteria that can enhance plant growth and protect plants from disease and abiotic stresses through a wide variety of mechanisms; those that establish close associations with plants, such as the endophytes, could be more successful in plant growth promotion. Several important bacterial characteristics, such as biological nitrogen fixation, phosphate solubilization, ACC deaminase activity, and production of siderophores and phytohormones, can be assessed as plant growth promotion (PGP) traits. Bacterial inoculants can contribute to increase agronomic efficiency by reducing production costs...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nitrogen fixation; Siderophore production; Plant-bacteria interaction; Inoculant; Rhizosphere.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000400401

Cyanobacterial nitrogenases: phylogenetic diversity, regulation and functional predictions
Provedor de dados: 74
Autores: Esteves-Ferreira,Alberto A.; Cavalcanti,João Henrique Frota; Vaz,Marcelo Gomes Marçal Vieira; Alvarenga,Luna V.; Nunes-Nesi,Adriano; Araújo,Wagner L.
Abstract Cyanobacteria is a remarkable group of prokaryotic photosynthetic microorganisms, with several genera capable of fixing atmospheric nitrogen (N2) and presenting a wide range of morphologies. Although the nitrogenase complex is not present in all cyanobacterial taxa, it is spread across several cyanobacterial strains. The nitrogenase complex has also a high theoretical potential for biofuel production, since H2 is a by-product produced during N2 fixation. In this review we discuss the significance of a relatively wide variety of cell morphologies and metabolic strategies that allow spatial and temporal separation of N2 fixation from photosynthesis in cyanobacteria. Phylogenetic reconstructions based on 16S rRNA and nifD gene sequences shed light on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cyanobacteria; Evolution; Hydrogen; Nitrogen fixation; Molecular phylogeny.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572017000200261

Soja: molibdênio e cobalto.
Provedor de dados: 14
Autores: SFREDO, G. J.; OLIVEIRA, M. C. N. de.
Introdução: nitrogênio, molibdênio, cobalto. Resultados da Embrapa Soja: safra de 1992/93, 1993/94, 1994/95. Resultados da Fundação Mato Grosso do Sul. Considerações gerais: Embrapa Soja, Fundação Mato Grosso do Sul. Recomendações.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Soja; Fertilidade do solo; Microelemento; Fixação de nitrogênio; Soybeans; Soil fertility; Nitrogen fixation; Trace elements.
Ano: 2010
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/859439

Mitigação das emissões de gases de efeitos estufa pela adoção das tecnologias do Plano ABC: estimativas parciais.
Provedor de dados: 14
Autores: MANZATTO, C. V.; ARAUJO, L. S. de; ASSAD, E. D.; SAMPAIO, F. G.; SOTTA, E. D.; VICENTE, L. E.; PEREIRA, S. E. M.; LOEBMANN, D. G. dos S. W.; VICENTE, A. K.
A publicação apresenta um primeiro estudo efetuado sobre as tecnologias preconizadas pela Plataforma ABC (TECabc) e que teve como objetivos discutir e analisar a lógica produtiva de tais tecnologias e realizar uma estimativa inicial da contribuição do Plano ABC para a mitigação das emissões dos gases de efeito estufa, ressaltando-se as variações e incertezas dos dados disponíveis sobre a adoção das TECabc, a diversidade de sistemas de produção e manejo do solo e a ausência de coeficientes de emissõ es regionalizados.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Recuperação de pastagem; Fixação biológica de nitrogênio; Gases de efeito estufa; Mitigação; Agricultura Sustentável; Efeito Estufa; Mudança Climática; Agrossilvicultura; Fixação Simbiótica de Nitrogênio; Florestamento; Política Ambiental; Plantio Direto; Greenhouse gas emissions; Sustainable agricultural intensification; Integrated agricultural systems; Nitrogen fixation; Waste treatment; Animal wastes; Environmental policy.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1123612

Adubação nitrogenada suplementar tardia na soja cultivada em latossolos de Cerrado.
Provedor de dados: 14
Autores: MENDES, I. de C.; REIS JÚNIOR, F. B. dos; HUNGRIA, M.; SOUSA, D. M. G. de; CAMPO, R. J.; AGUIAR, J. L. P.; SOUSA, T. C. R. de.
RESUMO: Foi avaliado o efeito da suplementação tardia (pré-florescimento e início do enchimento de grãos) com diferentes fonte de adubo nitrogenado (uréia, nitrato de amônio e sulfato de amônio) no rendimento da soja cultivada em latossolos de Cerrado. Quinze experimentos foram conduzidos na Embrapa Cerrados, no período de 2000 a 2005, em latossolos com populações estabelecidas de Bradyrhizobium capazes de nodular a soja. Em apenas dois experimentos, a resposta da soja à adubação tardia com nitrogênio foi estatisticamente significativa. Considerando-se o custo do adubo nitrogenado e o preço da soja, foi verificado que a adubação tardia com nitrogênio não acarreta nenhum lucro para os produtores, já que o custo de produção com adoção dessa prática supera as...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Adubação; Fixação de Nitrogênio; Fertilizante Nitrogenado; Glycine Max; Nitrogênio; Soja.; Fertilizer application; Nitrogen; Nitrogen fertilizers; Nitrogen fixation; Soybeans.
Ano: 2007
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/571954

Mofo-branco (Sclerotinia sclerotiorum)em crotalárias no sistema de produção de soja.
Provedor de dados: 14
Autores: ROESE, A. D.; GARCIA, R. A.
bitstream/item/212672/1/COT-253-.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Fitossanidade; Fixação biológica de nitrogênio; Soja; Fungo; Crotalária; Adubo Verde; Mofo Branco; Soybeans; Green manures; Plant health; Nitrogen fixation.
Ano: 2019
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1122007

Utilização das técnicas de ELISA e BIOLOG para estudos de diversidade intra-específica em isolados de Azospirillum amazonense associados a diferentes espécies de brachiaria.
Provedor de dados: 14
Autores: REIS JUNIOR, F. B. dos; TEIXEIRA, K. R. dos S.; REIS, V. M.
ABSTRACT: This limitation of nitrogen is considered one of the most important factors influencing the Brazilian pastures degradation. However there are evidences that pastures formed by some species of the Brachiaria genus could be benefited by the biological fixation (BNF), guaranteeing a higher longevity to these pastures. Previous studies showed that the diazotrophic bacteria found in association with these forage grasses were mainly from the Azospirillum amazonense species. Since associations between these microorganisms and plants are generally conditioned by the vegetation, it is possible that different Brachiaria genotypes can exercise a selective effect on the Azospirillum populations. The aim of this work was to study the intra-specific diversity...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Feed grasses.; Bactéria; Capim Brachiaria; Fixação de Nitrogênio; Gramínea Forrageira; Microbiologia do Solo.; Azospirillum amazonense; Nitrogen fixation; Microbiology; Soil.
Ano: 2003
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/568168

Potencial agrícola de bactérias endofíticas obtidas de bambu Guadua spp.
Provedor de dados: 14
Autores: VALE, S. M. L. S. do; VALE, P. A. A. do; CARVALHO, C. M.; SIVIERO, A.
Esta pesquisa teve por objetivo caracterizar as bactérias endofíticas de Guadua spp. e estimar o seu potencial de uso agrícola como solubilizados de fosfato e fixação de nitrogênio.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Sustancias de crecimiento vegetal; Solubilización.; Fijación del nitrógeno; Bactéria endofítica; Endophytic bacteria; Cultivo in vitro; Guadua chaparensis; Guadua weberbeauri; Bambu; Fosfato.; Solubilização; Estimulante de Crescimento Vegetal; Cultura In Vitro; Fixação de Nitrogênio; Biofertilizante; Nitrogen fixation; Phosphates.; Bamboos; Guadua; Plant growth substances; In vitro culture; Solubilization.
Ano: 2019
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1119043

A fixação biológica do nitrogênio como tecnologia de baixa emissão de carbono para as culturas do feijoeiro e da soja.
Provedor de dados: 14
Autores: HUNGRIA, M.; MENDES, I. C.; MERCANTE, F. M.
Introdução. Fontes potenciais de fornecimento de nitrogênio às plantas. Emissões de gases do efeito estufa (GEE) relacionadas à síntese e uso de N-Fertilizante. Quantificação da redução da emissão de carbono pela troca do N-fertilizante pela inoculação e aplicabilidade da FBN frente ao Plano ABC e ao Programa ABC: Estimativa potencial na cultura do feijoeiro, Estimativa potencial na cultura da soja.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Feijão; Soja; Fixação de nitrogênio; Soybeans; Beans; Nitrogen fixation.
Ano: 2013
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/964424

Alternativas de manejo de pastagem para melhor aproveitamento do nitrogênio do solo.
Provedor de dados: 14
Autores: SCHUNKE, R. M.
Neste documento propoê-se que um manejo de pastagem eficiente poderá aumentar o aporte de nitrogênio a esses sistemas de produçã, garantindo a sua sustentabilidade. Tal manejo envolve a escolha da espécie forrageira apropriada e a manutenção da fertilidade do solo, aliada ao aumento da biodiversidade que pode ser alcançada com o uso de leguminosas fixadoras de nitrogênio atmosférico. Envolve tambem um manejo animal adequado no que se refere a carga e ao diferimento dela. Esse conjunto de ações, que possibilitarão a regulação da mineralização do N em diversos sistemas de utilização das pastagens, por meio da manipulação das entradas e saídas no N nos diversos compartimentos do ciclo do elemento, será o caminho para se garantir a sustentabilidade dessas...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Consorciação; Management; Mixed pastures.; Adubação; Bovino; Fixação de Nitrogênio; Manejo; Pastagem.; Cattle; Fertilizer application; Pastures.; Nitrogen fixation.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/320939

Nitrogen use of a mixed tree crop plantation with a leguminous cover crop.
Provedor de dados: 14
Autores: LEHMANN, J.; SILVA JUNIOR, J. P. da; GEBAUER, G.; SILVA, L. F. da.
Study on two associated frut tree crops take up their N in comparison to a leguminous cover crop in an agroforestry system. Preliminar results showed the pueraria had the highest foliar N content followed by pupunha; cupuacu having less than the other two. One year after application, cupuacu took up more of the applied N in comparison to the total N uptake than pueraria and pupunha as seen from the high &amp;15N values. The amount of 15N taken up in relation to dry matter equaled between the three species, since pueraria had a lot higher N contents. The other sampling dates showed the same tendency.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Agrofloresta; Brasil; Amazonas; Manaus; Tropical leguminous; Bactris Gasipaes; Cobertura do Solo; Conservação do Solo; Cultivo Multiplo; Cupuaçu; Fixação de Nitrogênio; Floresta Tropical Úmida; Leguminosa Tropical; Pueraria Phaseoloides; Pupunha; Theobroma Grandiflorum; Pueraria; Agroforestry; Cover crops; Mixed cropping; Multiple cropping; Nitrogen fixation; Soil conservation; Tropical rain forests.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/668343

Soil nutrient amendment with leaves of varying quality.
Provedor de dados: 14
Autores: FERNANDES, T. P.; SILVA, R. B.; SILVA JUNIOR, J. P. da; LEHMANN, J.
Study on the impact of nitrogen and phosphorus fertilization combined with litter amendment on the microbial biomass ofa xanthic Ferralso. (0cm-5cm and 10cm-20cm). First peliminary results after 18 days of incubation showed that soil amended with P tended to have higher microbial C than soils fertilized with N or the control. This result indicates that nitrogen is probably not limiting microbial biomass growth the most , but rather P.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Folhas; Brasil; Amazonas; Fixação de Nitrogênio; Floresta Tropical Úmida; Leaves; Nitrogen fixation; Tropical rain forests.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/668345

Inoculacao do feijao com Rhizobium phaseoli em solos de varzeas dos cerrados.
Provedor de dados: 14
Autores: PERES, J. R. R.; SUHET, A. R.
bitstream/item/99298/1/comtec-45.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Rhizobium leguminosarum biovar phaseoli; Distrito Federal; Planaltina; Brasil; Flooded land.; Cerrado; Feijão; Fixação de Nitrogênio; Inoculação; Inoculação Artificial; Phaseolus Vulgaris; Rhizobium; Solo Hidromórfico; Várzea.; Kidney beans; Inoculation methods; Nitrogen fixation; Soil.
Ano: 1985
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/547969

Reciclagem de N por leguminosas cultivadas durante a seca nos cerrados.
Provedor de dados: 14
Autores: BURLE, M. L.; PERES, J. R. R.; SUHET, A. R.; RESCK, D. V. S.; PEREIRA, J.; BOWEN, W. T.
bitstream/item/102180/1/pesq-46.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Fixacao biologica; Potencial; Cultivo; Epoca seca; Feijao Bravo do Ceara; Cultivar; Canavalia brasiliensis; Mucuna aterrima; CPAC 1230; Cultivation.; Absorção; Cajanus Cajan; Cerrado; Guandu; Leguminosa; Nitrogênio; Mucuna Preta; Stylosanthes Guianensis.; Absorption; Tephrosia candida; Dry season; Legumes; Nitrogen fixation; Varieties.
Ano: 1990
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/549385

Efeito do tratamento de sementes de soja com fungicidas na nodulacao e fixacao simbiotica do N2.
Provedor de dados: 14
Autores: CAMPO, R. J.; HUNGRIA, M.
bitstream/CNPSO/17094/1/pesqAnd021.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Soja; Fixação de nitrogênio; Nitrogen fixation; Soybeans.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/461385

Fixacao biologica de nitrogenio em solos de cerrados (1994).
Provedor de dados: 14
Autores: VARGAS, M. A. T.; SUHET, A. R.; MENDES, I. de C.; PERES, J. R. R.
bitstream/item/120967/1/vargas-01.pdf
Tipo: Livro técnico (INFOTECA-E)
Palavras-chave: Fixacao biologica; Planta leguminosa; Planta Leguminosa forrageira; Legumes crops; Feed legumes; Plants; Winter crops.; Cerrado; Feijão; Glycine Max; Inverno; Nitrogênio; Phaseolus Vulgaris; Soja; Solo.; Kidney beans; Nitrogen fixation; Soybeans.; Soil biology; Soil; Savannas.
Ano: 1994
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/556081

Coinoculação da soja com Bradyrhizobium e Azospirillum na safra 2019/2020 no Paraná.
Provedor de dados: 14
Autores: PRANDO, A. M.; OLIVEIRA, A. B. de; LIMA, D. de; POSSAMAI, E. J.; REIS, E. A.; NOGUEIRA, M. A.; HUNGRIA, M.; CONTE, O.
bitstream/item/220542/1/CIrc-Tec-166.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Soja; Fixação de Nitrogênio; Soybeans; Nitrogen fixation.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1129470

Utilizacao do sistema BIOLOG para avaliacao da diversidade intraespecifica de isolados de Azospirillum amazonense oriundos da associacao de diferentes especies de brachiaria.
Provedor de dados: 14
Autores: REIS JUNIOR, F. B. dos; SILVA, M. F. da; TEIXEIRA, K. R. dos S.; URQUIAGA, S.; REIS, V. M.
bitstream/CPAC-2009/24156/1/p2002_41.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Bactéria; Fixação de Nitrogênio; Microbiologia do Solo; Pastagem.; Azospirillum amazonense; Pastures; Microbiology; Nitrogen fixation; Soil.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567463

Subsidios para a revisao do Programa Nacional de Pesquisa de Soja.
Provedor de dados: 14
Autores: EMBRAPA. Centro Nacional de Pesquisa de Soja (Londrina, PR).
Diagnostico da producao; Niveis de conhecimento e de adocao de tecnologia; Problemas atuais e potenciais da producao que dependem de solucao por parte da pesquisa; Objetivos gerais do Programa Nacional; Prioridades da pesquisa a nivel nacional, definidas em 1977; Detalhamento das prioridades a nivel regional.
Tipo: Livro técnico (INFOTECA-E)
Palavras-chave: Brasil; Armazenagem; Soybean; Production; Price; Seed; Disease; Pest; Nematode; Doença; Fixação de Nitrogênio; Manejo do Solo; Melhoramento; Nematóide; Nutrição Humana; Pesquisa; Praga; Preço; Produção; Semente; Soja; Brazil; Breeding; Human nutrition; Nitrogen fixation; Research; Soil management; Storage.
Ano: 1980
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/449445

Fixação biológica de nitrogênio.
Provedor de dados: 14
Autores: NOGUEIRA, M. A.; HUNGRIA, M.
Qalidade e quantidade dos inoculantes. O que deve ser observado na compra do inoculante. Cuidados na inoculação. Nitrogênio mineral.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Fixação de nitrogênio; Soja; Nitrogen fixation; Soybeans.
Ano: 2014
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1000560

Inoculante à base de bactérias solubilizadoras de fosfato nas culturas do milho e da soja (BiomaPhos®): dúvidas frequentes e boas práticas de inoculação.
Provedor de dados: 14
Autores: OLIVEIRA-PAIVA, C. A.; BINI, D.; MARRIEL, I. E.; GOMES, E. A.; SANTOS, F. C. dos; COTA, L. V.; SOUSA, S. M. de; ALVES, V. M. C.; LANA, U. G. de P.; SOUZA, F. F. de.
bitstream/item/227071/1/COT-252-BiomaPhos-duvidas-frequentes-e-boas-praticas.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Inoculante; Produtividade; Bactéria; Crescimento; Fixação de Nitrogênio; Soil inoculation; Nitrogen fixation.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1135409

Inoculação em soja: vale a pena fazer anualmente.
Provedor de dados: 14
Autores: NOGUEIRA, M. A.; HUNGRIA, M.
Fixação biológica de nitrogênio. qualidade e quantidade dos inoculantes. O que deve ser observado na compra do inoculante. cuidados na inoculação. Nitrogênio mineral. Características.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Soja; Fixação de nitrogênio; Soybeans; Nitrogen fixation.
Ano: 2013
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1004717

Análises de restrição do DNA Ribossomal Amplificado (ARDRA) em estudos de diversidade intra-específica de Azospirillum amazonense isolado de diferentes espécies de brachiaria.
Provedor de dados: 14
Autores: REIS JÚNIOR, F. B. dos; TEIXEIRA, K. R. dos S.; REIS, V. M.
ABSTRACT: The limitation of nitrogen is considered one of the most important factors for the Brazilian pastures degradation. However there are evidences that pastures formed by some species of Brachiaria could be benefited by the biological nitrogen fixation (BNF) guaranteeing a higer longevity to these pastures. Previus studies showed that the diazotrophic bacteria found inassociation with Brachiaria were mainly from the Azospirillum amazonense specie. Since associations between these microorganisms and plants are generally conditioned by the vegetation, it is possible that different Brachiaria genotypes can exercise a selective effect on the Azospirillum populations. The aim of this work was to study the intra-specific diversity of A. amazonense isolates...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Feed grasses; Diazotropic bacteria.; Bactéria; Capim Brachiaria; Fixação de Nitrogênio; Gramínea Forrageira; Microbiologia do Solo.; Azospirillum amazonense; Microbial ecology; Pastures; Nitrogen fixation; Microbiology; Soil.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569406

CULTIVO e uso do Estilosantes-campo-grande.
Provedor de dados: 14
Autores: Embrapa Gado de Corte (Campo Grande, MS).
Equipe multidisciplinar: Ademir Hugo Zimmer, CNPGC; Armindo Neivo Kichel, CNPGC; Bela Grof; Carlos Maurício Soares de Andrade; Celso Dornelas Fernandes, CNPGC; Francisco Assis Rolim Pereira; Haroldo Pires Queiroz, CNPGC; Hortência Maria Abranches Purcino; Jaqueline Rosemeire Verzignassi, CNPGC; José Alexandre Agiova da Costa, CNPGC; José Marcelino Sobrinho (in memorian); José Marques da Silva, CNPGC; José Raul Valério, CNPGC; Leônidas da Costa Schalcher Valle; Manuel Cláudio Motta Macedo, CNPGC; Maria José D´Ávila Charchar; Maria do Socorro Bona Nascimento; Marta Pereira da Silva; Rosângela Maria Simeão Resende; Roza Maria Shunke. Histórico e descrição da cultivar. Principais atributos do estilosantes-campo-grande. Fixação biológica de nitrogênio e valor...
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Estilosantes; Desempenho animal; Consorciação; Campo Grande; Mato Grosso do Sul; Brasil; Management; Feed crops; Sustainability; Mixed pastures; Pests of plants; Plant diseases.; Desenvolvimento Sustentável; Doença de Planta; Erva Daninha; Fixação de Nitrogênio; Historia; Leguminosae; Leguminosa Forrageira; Manejo; Pastejo; Pastagem; Nutrição Animal; Planta Forrageira; Praga de Planta; Produção Animal; Sistema de Cultivo; Valor Nutritivo.; Animal performance; Animal nutrition; Stylosanthes; Animal production; Brazil; Cropping systems; Grazing; History; Nutritive value; Pastures; Nitrogen fixation; Weeds.
Ano: 2007
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/319150

Fixação de nitrogênio pela soja em sistemas de cultivo contínuo e rotacionado com pecuária nos Cerrados.
Provedor de dados: 14
Autores: MIRANDA, C. H. B.; MACEDO, M. C. M.
Quantificou-se a contribuição da fixação biológica de N2 (FBN) na cultura da soja em um Latossolo Vermelho-Escuro, utilizando-se a técnica da abundância natural do isótopo 15N. Foram estudados cinco tratamentos: 1) soja de primeiro ano em solo cultivado por quatro anos com Brachiaria decumbens, sob pastejo, e preparado mecanicamente (arado, grade pesada e niveladora); 2) mesmas condições anteriores, mas com plantio direto da soja; 3) soja em cultivo contínuo por cinco anos, como cultura de verão, sem plantio de milheto no outono/ inverno, e solo preparado de forma convencional (arado, grade pesada e niveladora); 4) soja com cultivo contínuo por cinco anos, com cultivo de outono/inverno de milheto (Pennisetum atropurpureum) e preparo de solo...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Integração agricultura pecuária; Sustentabilidade; Brasil; Agropastoral systems; Sustainability; Brazilian savannas.; Brachiaria; Cerrado; Fixação de Nitrogênio; Milheto; Panicum Maximum; Sistema de Cultivo; Soja.; Cropping systems; Brazil; Nitrogen fixation; Millets; Soybeans.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/325260

"Beta-rizóbios": os novos simbiontes encontrados em espécies de Mimosa.
Provedor de dados: 14
Autores: REIS JÚNIOR, F. B. dos; FARIA, S. M. de; MENDES, I. de C.; SIMON, M. F.; LOUREIRO, M. de F.; ELLIOT, G. N.; YOUNG, P.; SPRENT, J. I.; JAMES, E. K.
The fixation and transformation of atmospheric dinitrogen into ammonia and hence into organic e compounds is a crucial part of the nitrogen cycle. Nitrogenase, the enzyme responsible, has a wide taxonomie distribution in the bacteria and archaea, but is confined to a limited number of species. Among these, rhizobia, whieh form nodules on the roots of legumes, are recognised as the main contributors of biologieally-fixed nitrogen. Until recently, it has been generally accepted that legumes are nodulated exelusively by members of the alfa-proteobaeteria belonging to a number of related genera in the family Rhizobiaceae. In this document we review some results from recent studies that presents the newly-discovered beta-rhizobia which challenge the accepted...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Feed legumes.; Fixação de Nitrogênio; Leguminosa Forrageira; Simbiose.; Rhizobium; Nitrogen fixation; Symbiosis.
Ano: 2006
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/570271

Resultados de pesquisa da Embrapa Soja - 2001: microbiologia de solos.
Provedor de dados: 14
Autores: HOFFMANN-CAMPO, C .B.; SARAIVA, O. F.
Associações microbianas na nutrição e desenvolvimento de plantas de soja; Interação entre espécies vegetais e microrganismos do solo em sistemas de rotação e sucessão de culturas em semeadura direta ou preparo convencional do solo (04.0.94.322-05); Efeito de diferentes sistemas de preparo do solo e sistemas de cultivo na microbiologia do solo; A fauna do solo no sistema de semeadura direta: comunidades e função no sistema edáfico; Diversidade microbiana e de Rhizobium e bradyrhizobium em solos cultivados em feijoeiro e soja sob os sistemas de plantio direto e plantio convencional (02.2001.327.03); Identificação de estirpes de Bradyrhizobium japonicum (B. elkanii) mais eficientes e competitivas para a cultura da soja e avaliação de respostas à inoculação...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Fixação de Nitrogênio; Microbiologia do Solo; Soja.; Bradyrhizobium; Microbiology; Nitrogen fixation; Soybeans.; Soil.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/463863

Tecnologia de coinoculação: rizóbios e Azospirillum em soja e feijoeiro.
Provedor de dados: 14
Autores: HUNGRIA, M.; NOGUEIRA, M. A.
Em que consiste a tecnologia de coinoculação? Isso representa uma inovação tecnológica para a agricultura brasileira? Quais as vantagens da inoculação com rizóbios? Se os benefícios dos rizóbios já são tão relevantes, pro que aplicar outro microrganismo? O uso desses microrganismos é vantajoso para o agricultor e para o meio ambiente? E na colheita, o agricultor pode encontrar mais benefícios?
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Soja; Feijão; Fixação de nitrogênio; Soybeans; Beans; Nitrogen fixation.
Ano: 2014
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/984365

Subtractive library of soybean roots in response to inoculation with Bradyrhizobium japonicum.
Provedor de dados: 14
Autores: CARVALHO, G. A. B. de; BATISTA, J. S. S.; MARCELINO, F. C.; HUNGRIA, M.
ABSTRACT: Soybean [Glycine max (L.) Merr.] is the most important legume cropped worldwide, with an economic value attributed mainly to the high protein content of the grain, which, in turn, demands a heavy supply of nitrogen. An environmentally friendly source of nitrogen at low cost to farmers is represented by the biological fixation of atmospheric nitrogen that takes place is association with symbiotic bacteria. For the soybean, the association occurs mainly with bacteria belonging to the species Bradyrhizobium japonicum and Bradyrhizobium elkanii, but our knowledge about gene expression associated with the symbiosis is still poor. This work - part of an effort by the Soybean Genome Consortium (Genosoja)?was conducted with the aim of achieving better...
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Soja; Inoculação; Fixação de nitrogênio; Soybeans; Nitrogen fixation; Root inoculation.
Ano: 2012
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/945205

Resultados de pesquisa da Embrapa Soja - 2000: microbiologia de solos.
Provedor de dados: 14
Autores: HOFFMANN-CAMPO, C.B.; SARAIVA, O. F.
Associações microbianas na nutrição nitrogenada da soja; Caracterização genética, fisiológica e bioquímica de estirpes de Bradyrhizobium para a cultura da soja e de solos da Região Sul e do Cerrado e com maior eficiência de fixação do nitrogênio e capacidade competitiva (04.0.94.322-02); Experimentação em rede nacional para recomendação de estirpes de Bradyrhizobium e inoculantes (04.0.94.322-03); Caracterizaao e seleção de genótipos de soja para a fixação biológica do N2 e observação de genótipos mais responsivos (04.0.94.322-04); Interação entre espécies vegetais e microrganismos do solo em sistemas de rotação e sucessão de culturas em semeadura direta ou preparo convencional do solo (04.0.94.322-05); Efeito ecológico e mutagênico do Al e Mn sobre o...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Fixação de Nitrogênio; Microbiologia do Solo; Soja.; Bradyrhizobium; Microbiology; Nitrogen fixation; Soil; Soybeans.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/462863

Anais...
Provedor de dados: 14
Autores: REUNIÃO DA REDE DE LABORATÓRIOS PARA A RECOMENDAÇÃO, PADRONIZAÇÃO E DIFUSÃO DE TECNOLOGIAS DE INOCULANTES MICROBIANOS DE INTERESSE AGRÍCOLA, 17., 2014, Londrina.
Situação atual do marco regulatório sobre o acesso ao patrimônio genético frente às atividades de pesquisa e desenvolvimento de produtos biológicos. Principais atividades da coordenação de fertilizantes, inoculantes e corretivos no biênio 2012-2014. Resultados das análises da fiscalização de produtos inoculantes para leguminosas nos anos de 2012-2013 e estabelecimento de um ensaio interlaboratorial. Perspectivas de uso de inoculantes microbianos no Brasil: a visão da ANPII. A rede ?FBN_ABC?: compromisso com a promoção dos benefícios da Fixação Biológica do Nitrogênio ( FBN) através dos inoculantes. Método alternativo para contagem e viabilidade celular para inoculantes: novo horizonte baseado em citometria de fluxo. Alternativa metodológica para contagem...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Fixação de nitrogênio; Nitrogen fixation.
Ano: 2016
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1044383

Inoculação de bactérias diazotróficas e diferentes doses de nitrogênio em dois genótipos de trigo em condições de campo.
Provedor de dados: 14
Autores: GIORI, F. G.; MOREIRA, L. Q.; CHAVES, V.; SANTOS, C. L. dos; FERREIRA, J. S.; SILVA JUNIOR, J. P. da; RIBEIRO JUNIOR, W.; REIS, V. M.
bitstream/item/159664/1/FD-0356.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Inoculation.; Nitrogen fixation; Wheat.
Ano: 2009
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/842969

MANEJO de pastagens consorciadas com amendoim forrageiro: programa 29: Norte.
Provedor de dados: 14
O Prosa Rural desta semana destaca o manejo das pastagens consorciadas com o amendoim forrageiro - uma leguminosa rica em proteína, com capacidade de fixar nitrogênio no solo, melhorar a qualidade da dieta do rebanho e proporcionar longevidade às pastagens. Quem traz as orientações sobre como fazer este manejo, de modo a potencializar o desempenho produtivo do rebanho é o pesquisador da Embrapa Acre, Carlos Maurício Andrade.
Tipo: Prosa Rural (INFOTECA-E)
Palavras-chave: Amendoim forrageiro; Amendoim; Pastagem Consorciada; Fixação de Nitrogênio; Rebanho; Dieta; Produtividade; Peanuts; Nitrogen fixation; Pastures.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1124123

Efeito de agroquimicos na nodulacao da ervilha (Pisum sativum (L.)).
Provedor de dados: 14
Autores: PERES, J. R. R.; SUHET, A. R.; VARGAS, M. A. T.; MENDES, I. C.
bitstream/item/102189/1/pesq-52.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Tratamento quimico; Rhizobium leguminosarum biovar viceae; CPAC EV-5; CPAC EV-6; Root nodulation; Seed dressing.; Ervilha; Fixação de Nitrogênio; Nodulação; Pisum Sativum; Semente.; Nitrogen fixation; Peas.
Ano: 1990
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/549391

Fixação Biológica do Nitrogênio em Centrosema em Solo de Cerrados.
Provedor de dados: 14
Autores: VARGAS, M. A. T.; MENDES, I. C.; SUHET, A. R.; PERES, J. R. R.
bitstream/item/75926/1/bolpd-35.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Centrosema macrocarpum; Feed legumes; Fixação biológica; Forrageira.; Centrosema; Centrosema Pubescens; Cerrado; Fixação de Nitrogênio; Leguminosa; Microbiologia; Nitrogênio; Solo.; Bradyrhizobium; Nitrogen fixation; Soil.; Savannas.
Ano: 1993
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/548661

INOCULAÇÃO em soja: vale a pena fazer anualmente.
Provedor de dados: 14
Fixação biológica de nitrogênio. Qualidade e quantidade dos inoculantes. O que deve ser observado na compra do inoculante. Cuidados na inoculação. Nitrogênio mineral. Características.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Soja; Fixação de nitrogênio; Soybeans; Nitrogen fixation.
Ano: 2012
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/915976

Associação de bactérias promotoras de crescimento de plantas do gênero Azospirillum com diferentes espécies de brachiaria.
Provedor de dados: 14
Autores: REIS JÚNIOR, F. B. dos; TEIXEIRA, K. R. dos S.; URQUIAGA, S.; REIS, V. M.
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...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Degredação.; Bactéria; Brachiaria; Fixação de Nitrogênio; Microbiologia do Solo; Pastagem.; Azospirillum amazonense; Degradation; Nitrogen fixation; Pastures; Microbiology; Soil.
Ano: 2003
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567997

Tecnologia de fixação biológica do nitrogênio com o feijoeiro: viabilidade em pequenas propriedades familiares e em propriedades tecnificadas.
Provedor de dados: 14
Autores: HUNGRIA, M.; MENDES, I. C.; MERCANTE, F. M.
A fixação biológica do nitrogênio com a cultura do feijoeiro. Recomendação técnica da inoculação para a cultura do feijoeiro. Detalhamento da tecnologia: inoculantes e processos de inoculação, Pontos positivos da tecnologia, Embasamento técnico e riscos potenciais. Estudos de casos: Pequenas propriedades no município de Unaí, MG. Propriedades tecnificadas com altos rendimentos.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Feijão; Fixação de nitrogênio; Beans; Nitrogen fixation.
Ano: 2013
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/964425

Metodos de aplicacao de micronutrientes na nodulacao e na fixacao biologica do N2 em soja.
Provedor de dados: 14
Autores: CAMPO, R. J.; ALBINO, U. B.; HUNGRIA, M.
bitstream/CNPSO/17089/1/pesqAnd019.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Micronutriente; Soybean.; Fixação de Nitrogênio; Nodulação; Soja.; Nitrogen fixation; Nodulation; Trace elements.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/461380

Estratégias para aumentar a eficiência de inoculantes microbianos na cultura da soja.
Provedor de dados: 14
Autores: MERCANTE, F. M.; HUNGRIA, M.; MENDES, I. de C.; REIS JUNIOR, F. B. dos.
Inoculação em áreas de primeiro cultivo de soja. Inoculação em áreas tradicionais de cultivo com soja. Tratamento das sementes com fungicidas x inoculação de rizóbios. Aplicação dos micronutrientes cobalto (Co) e molibdênio (Mo). Adubação nitrogenada x fixação de N. Adubação nitrogenada x fixação de N. Sistemas de manejo da cultura. Uso de substância adesiva para inoculante turfoso. Rendimento médio de grãos de soja considerando 29 ensaios conduzidos em oito estados brasileiros, em solos tradicionalmente cultivados com soja e contendo 103 a 106 células de rizóbio/g solo. Ganho de rendimento de grãos de soja reinoculada com Bradyrhizobium em solos com população estabelecida, acima de 104 células/g solo, utilizando-se diferentes cultivares. Dourados, MS.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Soja; Fixação de nitrogênio; Nitrogen fixation; Soybeans.
Ano: 2011
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/909104

Nitrogen fixation in the eastern Atlantic reaches similar levels in the Southern and Northern Hemisphere
Provedor de dados: 5
Autores: Fonseca-batista, Debany; Dehairs, Frank; Riou, Virginie; Fripiat, Francois; Elskens, Marc; Deman, Florian; Brion, Natacha; Queroue, Fabien; Bode, Maya; Auel, Holger.
Euphotic layer dinitrogen (N-2) fixation and primary production (PP) were measured in the eastern Atlantic Ocean (38 degrees N-21 degrees S) using N-15(2) and C-13 bicarbonate tracer incubations. This region is influenced by Saharan dust deposition and waters with low nitrogen to phosphorus (N/P) ratios originating from the Subantarctic and the Benguela upwelling system. Depth-integrated rates of N-2 fixation in the north (0 degrees N-38 degrees N) ranged from 59 to 370 mu mol N m(-2) d(-1), with the maximal value at 19 degrees N under the influence of the northwest African upwelling. Diazotrophic activity in the south (0 degrees S-21 degrees S), though slightly lower, was surprisingly close to observations in the north, with values ranging from 47 to 119...
Tipo: Text
Palavras-chave: Nitrogen fixation; Atlantic Ocean; Primary production.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00379/49009/49451.pdf

The Delayed Island Mass Effect: how islands can remotely trigger blooms in the oligotrophic ocean
Provedor de dados: 5
Autores: Messié, M.; Petrenko, A.; Doglioli, A.m.; Aldebert, C.; Martinez, Elodie; Koenig, G.; Bonnet, S.; Moutin, T.
In oligotrophic gyres of the tropical ocean, islands can enhance phytoplankton biomass and create hotspots of productivity and biodiversity. This “Island Mass Effect” (IME) is typically identified by increased chlorophyll concentrations next to an island. Here we use a simple plankton model in a Lagrangian framework to represent an unexplained open ocean bloom, demonstrating how islands could have triggered it remotely. This new type of IME, termed “delayed IME”, occurs when nitrate is limiting, N:P ratios are low, and excess phosphate and iron remain in water masses after an initial bloom associated to a “classical” IME. Nitrogen fixers then slowly utilize leftover phosphate and iron while water masses get advected away, resulting in a bloom decoupled in...
Tipo: Text
Palavras-chave: Island mass effect; Lagrangian analysis; Nitrogen fixation; Nutrient supply; Oligotrophic ocean; Phytoplankton bloom.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00600/71162/69489.pdf

Metabolism of cyanobacteria in anaerobic marine sediments.
Provedor de dados: 5
Autores: Stal, L; Krumbein, W.
Two cyanobacteria isolated from marine microbial mats metabolized endogenous carbon reserves anaerobically in the dark. Microcoleus chthonoplastes reduced elemental sulfur to sulfide and Oscillatoria sp. additionally produced lactate in the absence of elemental sulfur. Under nitrogen fixing conditions, however, no sulfur reduction occurs. Lactate fermentation appeared to be the mechanism of anaerobic carbon degradation under these conditions. With a nitrogenase-reducible substrate, e.g. acetylene, added, lactate fermentation as well as sulfur reduction stops in cultures of Oscillatoria containing nitrogenase. In this case only ethylene production was observed. These cyanobacteria seem to possess the capability to carry out anaerobic dark metabolism...
Tipo: Text
Palavras-chave: Oscillatoria; Microcoleus chthonoplastes; Cyanophyta; Metabolism; Chemical cycles; Algae; Anoxic sediments; Anaerobic respiration; Algal mats; Biogeochemistry; Fermentation; Sulfur; Nitrogen fixation; Nitrogen cycle.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-974.pdf

Nitrogen fixation changes regulated by upper‐water structure in the South China Sea during the last two glacial cycles
Provedor de dados: 5
Autores: Li, Chen; Jian, Zhimin; Jia, Guodong; Dang, Haowen; Wang, Jianxin.
Marine nitrogen fixation contributes to the budget of biologically available N, thus fuels phytoplankton productivity and carbon cycle through biological pump. Modern N‐fixation rates are proved to be constrained by oceanographic condition and nutrient supply to the surface waters. However, the paleoceanographic reconstruction of N‐fixation and its regulation mechanism remain highly uncertain in many regions. Here we present records of N‐fixation changes in the South China Sea (SCS) over the past 250,000 years reconstructed by compound‐specific nitrogen isotopes of individual amino acids. The δ15N of source amino acids (δ15NSrc), reflecting the δ15N of the substrate nitrate originating from the subsurface water, is distinctly lower during interglacial...
Tipo: Text
Palavras-chave: Compound-specific delta N-15; Upper water structure; Bulk sedimentary delta N-15; Nitrogen fixation; Orbital time scale; South China Sea.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00509/62061/66237.pdf

Carbon-Based Estimate of Nitrogen Fixation-Derived Net Community Production in N-Depleted Ocean Gyres
Provedor de dados: 5
Autores: Ko, Young Ho; Lee, Kitack; Takahashi, Taro; Karl, David M.; Kang, Sung-ho; Lee, Eunil.
Accurate estimation of net community production (NCP) in the ocean is important for determining the future trend for carbon dioxide concentrations in the atmosphere and thus for understanding the global carbon cycle and climate change. Most methods for measuring NCP rely on analysis of dissolved fixed inorganic nitrogen species (N), which are believed to be limiting factors for NCP. However, in the vast areas of the ocean gyres only low levels of N are available for phytoplankton during much of the year. In this study the NCP was estimated by summing the seasonal reduction in the concentration of dissolved inorganic carbon (C-T) in the surface mixed layer, corrected for changes associated with salinity variation, net air-sea CO2 flux, horizontal C...
Tipo: Text
Palavras-chave: Net community production; Nitrogen fixation; Seasonal carbon drawdown; Oligotrophic ocean gyre.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00675/78683/80864.pdf

Stable isotopes (C-13/C-12 and N-15/N-14) in settling organic matter of the northwestern Mediterranean Sea: biogeochemical implications
Provedor de dados: 5
Autores: Kerherve, P; Minagawa, M; Heussner, S; Monaco, A.
Within the framework of the High Frequency Flux (HFF) experiment (MATER programme), time-series sediment traps have been deployed for two months on the continental slope off Marseilles to measure downward particle fluxes at a high frequency sampling rate (two and six days). Combined isotopic analyses of carbon and nitrogen have been performed on selected samples. Both isotopic tracers have been used for the first time on organic material of the Mediterranean Sea (Gulf of Lions) to determine the main biological sources and to address the biogeochemical processes that affected this material. Settling particles were characterised by very low values of delta N-15 (near 0 parts per thousand) and delta C-13 (near -24.5 parts per thousand) that indicate the...
Tipo: Text
Palavras-chave: Isotopes stables; Traceurs isotopiques; Particules en sédimentation; Fixation d’azote; Golfe du Lion; Stable isotopes; Isotopic tracers; Settling particles; Nitrogen fixation; Gulf of Lions.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00289/40019/38609.pdf

Effect of plant photosynthesis, carbon sources and ammonium availability on nitrogen fixation rates in the rhizosphere of Zostera noltii
Provedor de dados: 5
Autores: Welsh, Dt; Bourgues, S; Dewit, R; Auby, Isabelle.
Rates of nitrogen fixation (measured as acetylene reduction) in the rhizosphere of the seagrass Zostera noltii were highly dependent upon plant photosynthetic activity being significantly stimulated at elevated CO2 concentrations and by light, both in the short-term and over diurnal cycles. Stimulation by light became insignificant when 5 mM sucrose was added to the sediment porewater, indicating that in the absence of added carbon sources, light stimulation was due to direct inputs of plant photosynthate to the rhizosphere. Addition of a range of carbon sources to the rhizosphere sediment stimulated rates of acetylene reduction, with this stimulation being significant for sucrose and lactate. Surprisingly, whilst low additions of ammonium to the sediment...
Tipo: Text
Palavras-chave: Acetylene reduction; Nitrogen fixation; Rhizosphere; Zostera noltii; Plant photosynthesis; Root exudates; Carbon sources; Ammonium.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00151/26266/24350.pdf

Stimulation of nitrogen-fixing cyanobacteria in a Baltic Sea plankton community by land-derived organic matter or iron addition
Provedor de dados: 5
Autores: Stolte, Willem; Balode, Maija; Carlsson, Per; Grzebyk, Daniel; Janson, Sven; Lips, Inga; Panosso, Renata; Ward, Clive J.; Graneli, Edna.
In the Baltic Sea, floating blooms of nitrogen-fixing cyanobacteria occur yearly during late summer. These blooms can sometimes be limited by iron. Due to extensive foresting around the Baltic Sea, iron is entering the Baltic Sea partly bound to dissolved organic material (DOM) via rivers. An experiment was performed in 300 1 laboratory mesocosms to test the hypothesis that riverine high-molecular weight dissolved organic matter (HMWDOM), extracted by tangential flow filtration &gt; 1000 Da, stimulates the biomass of nitrogen-fixing cyanobacteria, by increasing the availability of iron. The addition of iron/EDTA and of DOM resulted in 5 to 10 times higher biomass of nitrogen-fixing cyanobacteria. Accordingly, higher primary production and particulate...
Tipo: Text
Palavras-chave: Mesocosm experiment; Humic acid; HMWDOM; High molecular weight dissolved organic matter; Iron; Nitrogen fixation; Cyanobacteria.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2470.pdf

The dispersal of nitrogen-fixing Enterobacteriaceae from sewage into the waters and sediments of Morecambe Bay, UK.
Provedor de dados: 5
Autores: Jones, K; Betaieb, M.
The sediments of Morecambe Bay contain large numbers of salinity-tolerant, nitrogen-fixing Enterobacteriaceae (NFEs) mainly Klebsiella pneumoniae ) which appear to be derived from sewage. Sewage effluents, regardless as to whether they have received primary or secondary treatment, contain huge numbers of NFEs with salinity-tolerant and freshwater strains present in roughly equal quantities. The bacteria are discharged into the rivers and estuaries and carried out to sea. Once in the sea the salinity-tolerant strains retain their viability better than the freshwater strains so that the incoming tide, which doses the sediments, contains mainly salinity-tolerant NFEs. It is probable that similar processes occur all round the U.K. coast, as inshore coastal...
Tipo: Text
Palavras-chave: Klebsiella pneumoniae; Enterobacteriaceae; Salinity tolerance; Microbial contamination; Pathogenic bacteria; Bacteria; Sewage; Nitrogen fixation; Sediment pollution; Sea water.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-1003.pdf

根粒菌の増殖と代謝系に及ぼすヒドロキシリシンの影響
Provedor de dados: 19
Autores: 大和田, 琢二; 井川, 香子; 佐藤, 哲也; OHWADA, Takuji; IGAWA, Keiko; SATO, Tetsuya.
Palavras-chave: Rhizobium; バクテロイド; ヒドロキシリシン(Hyl); グルタミン酸; 窒素固定; Rhizobium; Bacteroid; Hydroxylysine; Glutamic acid; Nitrogen fixation.
Ano: 1998
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1294

Linking Biological Nitrogen fixtation Research in Asia
Provedor de dados: 30
Autores: O.P.
Palavras-chave: Nitrogen fixation; Rhizobium; Pigeonpeas; Chickpeas; Root nodulation; Nitrogen; Legumes; Electrophoresis; Soybeans.
Ano: 1994
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4659

Production and Quality Control of Carrier-based Legume Inoculants
Provedor de dados: 30
Autores: J.A.
Palavras-chave: Products; Rhizobium; Root nodulation; Yeasts; Legumes; Application methods; Polysaccharides; Quality controls; Yeast extracts; Nitrogen fixation.
Ano: 1984
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3999

Facility for Growing Plants in Test Tubes at ICRISAT
Provedor de dados: 30
Autores: O.P.
Palavras-chave: Rhizobium; Chickpeas; Pigeonpeas; Root nodulation; Temperature; Nitrogen fixation; Polymers; Iron; Tropical zones; Quality.
Ano: 1984
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4025

ICGL 1, ICGL 2, ICGL 3, ICGL 4, and ICGL 5 nonnodulating groundnut germplasm lines
Provedor de dados: 30
Palavras-chave: Root nodulation; Genotypes; Genes; Recessive genes; Groundnuts; Alleles; Humus; Nitrogen fixation; Proteins; Plant habit.
Ano: 1992
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3832

Nitrogen Nutrition of Groundnut in Alfisols
Provedor de dados: 30
Autores: P.T.C.
Palavras-chave: Root nodulation; Groundnuts; Nitrogen fixation; Genotypes; Rhizobium; Bacteria; Nitrogen; Enzymes; Application methods; Legumes.
Ano: 1990
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4084

Growth and nodulation of Enterolobium contortisiliquum  grown in soils under different soil use systems in southwest  of Piaui State
Provedor de dados: 190
Autores: Jesus, Antonieta Alexandrina de; Costa, Elaine Martins da; Nóbrega, Rafaela Simão Abrahão; Diógenes, Larissa Castro; Nóbrega, Júlio Cesar Azevedo.
The aim of this study was to evaluate the effect of soil use systems from Southwest of Piaui State, Brazil, in growth and natural nodulation of tamboril [Enterolobium contortisiliquum (Vell) Morong] seedlings. The experiment was conducted in greenhouse at the Federal University of Piaui, in Bom Jesus, PI. The experiment design was completely randomized with ten replications. Treatments were consisted of four soil use systems (two areas of native forest, one grassland and one agriculture area). Seedlings were collected 85 days after planting, when height (H), collar diameter (CD), number of nodules (NN), nodule fresh matter (NFM), shoot (SDM), roots (RDM) and total dry matter (TDM), ratio of shoot and roots dry matter (SDM/TDR), Dickson quality index (DQI)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tamboril; Nitrogen fixation; Rhizobium Silvicultura; Produção de mudas; Enterolobium contortisiliquum Tamboril; Fixação de nitrogênio; Rhizobium.
Ano: 2017
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1460

Efeito do substrato sobre o crescimento de mudas de Mimosa bimucronata inoculadas com estirpes de rizóbio
Provedor de dados: 190
Autores: Freire, Juliana Müller; Jesus, Ederson da Conceição; Rouws, Janaína Ribeiro Costa; de Faria, Sérgio Miana; Zilli, Jerri Edson.
O objetivo deste trabalho é avaliar a resposta de mudas de Mimosa bimucronata (DC) O. Kuntze à inoculação com estirpes de rizóbio previamente selecionados, utilizar diferentes substratos em condições de viveiro. Utilizou-se o delineamento experimental em blocos ao acaso com parcelas subdivididas, testando-se três substratos (organomineral puro contendo barro, areia e esterco na proporção 1: 1: 1 v: v: v, organomineral misturado com 30% de palha e areia com vermiculita na proporção 1: 1 v: v) e quatro fontes de N (inoculação com as estirpes BR 3461 e BR 3470, tratamento controle com nitrogênio e controle sem adubação), totalizando 12 tratamentos. Foramavaliados altura e diâmetro do colo após 90 dias e massas da parte aérea, das raízes e dos nódulos secos...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ciências agrárias  engenharia florestal  silvicultura Rizobactéria; Fixação de nitrogênio; Leguminosas arbóreas Rhizobacteria; Nitrogen fixation; Leguminous treess.
Ano: 2017
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1132

Effect of soil interacting herbicides on soybean nodulation in Balcarce, Argentina
Provedor de dados: 86
Autores: Gonzalez,Norma; Eyherabide,Juan Jose; Barcelonna,Maria Ignacia; Gaspari,Alfredo; Sanmartino,Silvina.
Two trials were performed in Balcarce, Argentina (37° 45' LS; 58° 18' LW) during 1993-94, to assess the effect of eight herbicides applied individually or in tank mixtures, on nodule number, nodule dry weight, seed yield and N percent in seed in soybean Asgrow 3205, inoculated with Bradyrhizobium japonicum CB 1809. Individual herbicides and doses in kg ha-1 of a.i. were metribuzin (0.48), acetochlor (0.90), metolachlor (1), flumioxazin (0.075), trifluralin (0.96), imazaquin (0.20), imazethapyr (0.10) and chlorimuron ethyl (0.0125). The mixtures were metribuzin+acetochlor (0.48+0.9), flumioxazin+acetochlor (0.075+0.9), imazaquin+acetochlor (0.2+0.9), metribuzin+metolachlor (0.48+1.92), and flumioxazin+ metolachlor (0.075+1.92). A control treatment without...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bradyrhizobium japonicum; Herbicides injury; Nitrogen fixation; Yield.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999000700008

Differences in ureide and amino acid content of water stressed soybean inoculated with Bradyrhizobium japonicum and B. elkanii
Provedor de dados: 86
Autores: Ramos,Maria Lucrecia Gerosa; Parsons,Richard; Sprent,Janet Irene.
The objective of this work was to study the response to water stress of a drought sensitive soybean cultivar inoculated with Bradyrhizobium japonicum (strain CB1809, Semia 586) and B. elkanii (strain 29W, Semia 5019). CB1809 nodulated plants produced a significantly higher root fraction (19%) than 29W (14.6%). Plants inoculated with CB1809 produced less nodules and accumulated more nitrogen than those inoculated with 29W. In general, low amounts of ureides in nodules were found in watered plants inoculated with either CB1809 or 29W strains, but those levels were five-fold increased in stressed plants inoculated with CB1809. Nodules formed by strain CB1809 had aspartate and glutamate as major amino acids, while those formed by 29W had glutamate, asparagine...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Alanine; Asparagine; Aspartate; Glutamate; Nitrogen fixation.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2005000500005

Residual effects of successive exposure of soybean Bradyrhizobium strains to aluminium on solid defined medium
Provedor de dados: 86
Autores: Campo,Rubens José; Wood,Martin.
The aim of these studies was to investigate whether residual toxic effects of exposing soybean root nodule bacteria to Al in a solid defined media (SDM) alter tolerance to Al, survival, sensitivity to antibiotics, N2 fixation effectiveness and genetic diversity of Bradyrhizobium strains. After being exposed four times to Al, strains showed variation in Al tolerance but there was no evidence of change in their original Al tolerance, sensitivity to the antibiotics or genetic diversity. Exposure of Bradyrhizobium strains to SDM plus Al did not alter biological N2 fixation effectiveness of five strains. Strain SEMIA 587 showed a reduction in its N2 fixation effectiveness but it seems that it was just a superficial toxic effect because one single passage...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nitrogen fixation; Antibiotics; Resistance to chemicals; Genetic variation.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2001001100011

Agronomic and Economic Efficiency of Common-Bean Inoculation with Rhizobia and Mineral Nitrogen Fertilization
Provedor de dados: 90
Autores: Soares,Bruno Lima; Ferreira,Paulo Ademar Avelar; Rufini,Márcia; Martins,Fábio Aurélio Dias; Oliveira,Dâmiany Pádua; Reis,Ricardo Pereira; Andrade,Messias José Bastos de; Moreira,Fatima Maria de Souza.
ABSTRACT Management of biological nitrogen fixation in common bean still requires improvement. The objective of this study was to verify the compatibility of nitrogen fertilization with biological N2 fixation to increase common bean yield and profitability. Four field experiments were performed in four municipalities of Minas Gerais, Brazil, during the 2009 and 2010 winter crop season. The 2009 crop experiments were set up under a no-till system and the 2010 crop was conducted using conventional tillage. A randomized block experimental design was used with four replications and seven treatments combining application rates of mineral N (at sowing and/or topdressing) and seed inoculation with Rhizobium tropici strain CIAT899. Inoculation with 20 kg ha-1...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phaseolus vulgaris; Nitrogen fixation; No-till; Conventional tillage.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100416

Peanut response to lime and molybdenum application in low pH soils
Provedor de dados: 90
Autores: Quaggio,J. A.; Gallo,P. B.; Owino-Gerroh,C.; Abreu,M. F.; Cantarella,H.
Liming acid soils is considered to assure the availability of Mo in crops. Additionally, in peanuts (Arachis hypogaea L.) the positive response to liming is associated to a better supply of Ca+2, Mo for the nitrogenase-complex activity, and other non-nitrogen fixing activities of the crop. This study was thus undertaken to assess the effect of lime, Mo, and the lime-Mo interaction on peanut crop, on an acid Ultisol at the Mococa Experimental Station, Instituto Agronômico, São Paulo State, Brazil, from 1987 to 1990. A randomized complete block design with four replications, in a 4 x 4 factorial arrangement, was used in the study. The factors included four lime rates (0, 2, 4, and 6 t ha-1) broadcast and incorporated into the soil, and Mo (0, 100, 200, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Arachis hypogaea; Liming; Molybdenum; Nitrogen fixation.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832004000400008

Doses and application methods of Azospirillum brasilense in irrigated upland rice
Provedor de dados: 91
Autores: Garcia,Nayara F. S.; Arf,Orivaldo; Portugal,José R.; Peres,Amanda R.; Rodrigues,Mayara; Penteado,Mariele de S.
ABSTRACT The study was carried out in Selvíria-MS, in the 2011/12 and 2012/13 agricultural years, aiming to evaluate the efficiency of Azospirillum brasilense in nitrogen fixation in upland rice, as a function of doses and application methods of the inoculant containing this diazotrophic bacterium. The experimental design was randomized blocks, arranged in a 4 x 4 factorial scheme, with 4 doses of inoculant (control without inoculation, 100, 200 and 300 mL of the commercial product ha-1) and 4 application methods (seed inoculation, application in the sowing furrow, soil spraying after sowing, and foliar spraying at the beginning of plant tillering), with 4 replicates. During the experiment, the agronomic characteristics, production components and yield of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oryza sativa L.; Diazotrophic; Cv. IAC 202; Nitrogen fixation; Grain yield.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016001100990

Glutamine synthetase and glutamate synthase activities in relation to nitrogen fixation in Lotus spp.
Provedor de dados: 93
Autores: GONNET,SUSANA; DÍAZ,PEDRO.
Lotus corniculatus, L. tenuis, L. pedunculatus, and L. subbiflorus inoculated with Mesorhizobium loti NZP2037 strain were grown in a growth chamber. The plants dry weight (DW), the nodule fresh weight (FW), the nitrogenase activity, the nodule glutamine synthetase (GS) and glutamate synthase (GOGAT) activities, as well as the leghemoglobin content and the amino acid in the stem were measured 28 days after inoculation. The highest DW of plants was measured in L. tenuis and the highest FW of nodules was measured in L. pedunculatus. Nitrogenase activity in L. tenuis, L. pedunculatus and L. subbiflorus was six fold the activity in L. corniculatus. Nodule GS and GOGAT activities did not follow this same pattern. L. tenuis had the highest values of GS and GOGAT...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nitrogen fixation; Nitrogenase; Mesorhizobium loti; Leghemoglobin; Ammonia assimilation.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-31312000000300003

ENDOPHYTIC BACTERIA USED AS BIOINOCULANTS IN MICROPROPAGATED BANANA SEEDLINGS
Provedor de dados: 94
Autores: SOUZA,GLEIKA LARISSE OLIVEIRA DORASIO DE; SILVA,DEIVISSON FERREIRA DA; NIETSCHE,SILVIA; XAVIER,ADELICA APARECIDA; PEREIRA,MARLON CRISTIAN TOLEDO.
ABSTRACT  The use of bio-fertilizers and microbial inoculants that promote plant growth and increased yield has been accepted as an alternative to reduce the use of chemical fertilizers. The objective of the present study was to evaluate the effect of plant growth promoting bacteria inoculation on growth and quality of micropropagated banana seedlings ‘Prata Anã’. The experimental design was completely randomized, with four replications and the treatments consisted of 24 isolates of endophytic bacteria. The isolates EB-50 (Bacillus sp.) and EB-133 (Bacillus amyloliquefaciens) characterized as diazotrophic, the EB-51 (Bacillus pumilus) indicate for inorganic phosphate solubilization and EB-55(Bacillus subtilis) and EB-40 (Bacillus sp.) indole-3-acetic acid...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Musa sp; Nitrogen fixation; Phosphate solubilization; IAA; Plant growth promoting bacteria.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000200702

การคัดเลือกและจำแนกชนิดไรโซแบคทีเรียส่งเสริมการเจริญเติบโตของข้าว
Provedor de dados: 106
Autores: Waraporn Panyoo; Wichai Kositratana; Sujin Patarapuwadol.
Rhizobacteria were isolated from root and rhizospheric soil of rice collected from rice paddy fields in Nakhon Pathom and Sukhothai provinces. One hundred and sixteen isolates were screened for plant growth promoting properties. Nitrogen fixation property determined based on PCR amplification using primer Salkowski’s reagent and quantified by spectrophotometer at 530 nm. Siderophore production and phosphate solubilization were tested by plating technique in chrome azurol S and Pikovskaya’s medium. Eighty-one percent of isolated rhizobacteria revealed plant growth promoting properties. Sixty percent of rhizobacteria had only one property and 21% of them had more than one of plant growth promoting properties. All of plant growth promoting rhizobacteria which...
Tipo: Collection
Palavras-chave: Rhizobacteria; Nitrogen fixation; Plant growth; PGPR; IAA; Siderophore; ข้าว; ไรโซแบคทีเรีย; การตรึงไนโตรเจน; สารเร่งการเจริญเติบโตของพืช; รากข้าว; สารไซเดอโรฟอร์; การละลายฟอสเฟต.
Ano: 2012
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5416

การตรึงไนโตรเจนของจุลินทรีย์อิสระในดินและผลกระทบที่มีต่อผลผลิตของข้าวโพดหวานในระบบการปลูกแบบไม่ไถพรวน
Provedor de dados: 106
Autores: Arunee Kongsorn; Thongchai Mala; Siwaporn Toopakuntho; Suphachai Amkha.
Experimental design was split plot in randomized complete block design with 4 replications. Main plot consisted of conventional tillage and no tillage while sub plot consisted of  1) control  2) normal rate of chemical fertilizer  3) half rate of chemical fertilizer  4) azotobacter inoculation  5) azospirillum inoculation  6) soybean green manure and 7) mungbean green manure. The results showed no significant of nitrogen fixing microorganisms population, efficiency of nitrogen fixation and yield in various tillage systems, but various types of fertilizers had significant effect on them. The population of azotobacter and azospirillum were increased in application azotobacter and azospirillum treatments. Azotobacter treatment had the highest nitrogen...
Palavras-chave: Sweet corn; Azospirillum; Azotobacter; Nitrogen fixation; No tillage; ข้าวโพดหวาน; อะโซสไปริลลัม; อะโซโตแบคเตอร์; การตรึงไนโตรเจน; จุลินทรีย์ดิน; การไม่ไถพรวน; ปุ๋ยพืชสด; ปุ๋ยเคมี; การใส่ปุ๋ย; ผลผลิต; คุณภาพ.
Ano: 2010
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4674

N availability and mechanisms of N conservation in deciduous and semideciduous tropical forest legume trees
Provedor de dados: 39
Autores: Lima,Ana Lúcia da Silva; Zanella,Fábio; Schiavianto,Marlene Aparecida; Haddad,Claudia Regina Baptista.
Prior to abscission, nutrients are redeployed from leaves and redistributed to other parts of the plant. Data comparing nutrient resorption to soil fertility and leaf life span remains controversial in the literature. We compared nitrogen (N) conservation mechanisms among four legume trees with different leaf life spans (Hymenaea courbaril L. var. stilbocarpa (Hayne) Lee et Lang., Lonchocarpus guilleminianus (Tul.) Malme, Enterolobium contortisiliquum (Vell.) Morong and Peltophorum dubium (Spreng.) Taub.), from a semideciduous tropical forest, remnant of the Atlantic Forest. We hypothesized that these mechanisms differ among the four species and are affected by their leaf life span and by the availability of N, both as a mineral in the soil and, in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaf life span; Nitrogen fixation; Nitrogen resorption efficiency; Nitrogen resorption proficiency; Nitrogen-use efficiency.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062006000300012

Genetic linkage map and mapping of the locus of biological nitrogen fixation inefficiency in cowpea
Provedor de dados: 1
Autores: Seido, Sirando Lima; Fernandes Santos, Carlos Antonio.
The objectives of the present study were to construct a cowpea genetic map using the F2 population resulting from the cross IC-1 x BRS Marataoã, based on single nucleotide polymorphism (SNP) markers, and to map the cpi gene, with additional reference to introgression with the consensus map of species, aiming to identify markers for assisted selection to develop more efficient cultivars for BNF. The parents and 89 F2 plants were genotyped with 51,128 SNP markers, of which 910 polymorphic markers were used to construct the map. The results revealed 11 linkage groups, with an average of 82 markers per chromosome and average distance of 1.26 cM between markers. Recombination analysis of the SNPs indicated that markers 2_12850 and 2_00188, located in linkage...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vigna unguiculata; Nitrogen fixation; Marker-assisted selection.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42603

Evolution of nutrient availability in maturation phase of composting using proportions of different residues inoculated with Beijerinckia indica
Provedor de dados: 1
Autores: Sousa, Lusiene Barbosa; Stamford, Newton Pereira; Oliveira, Wagner Silva; Silva, Emmanuella Vila Nova; Martins, Marllon dos Santos; Santos, Carolina Etienne Rosália e Silva.
Organic matter has low N content; however, organic matter may be enriched by inoculation with selected diazotrophic bacteria. The aim of the paper was to evaluate the effects of biofertilizer produced by mixing different types and proportions of organic matter inoculated with the diazotrophic bacteria Beijerinckia indica. The experiment consisted of plastic trays (6 L) containing 5 kg of three different types of organic matter (filter mud cake, earthworm compost, and crop residue) applied in the following proportions (v:v:v): 1-(5:0:0), 2-(4:1:0), 3-(4:0:1), 4-(3:2:0), 5-(3:1:1), 6-(3:0:2), 7-(2:3:0), 8-(2:2:1), 9-(2:1:2), 10-(2:0:3), 11-(1:4:0), 12-(1:3:1), 13-(1:2:2), 14-(1:1:3), 15-(1:0:4), 16-(0:5:0), 17-(0:4:1), 18-(0:1:4), 19-(0:3:2), 20-(0:2:3), and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nitrogen fixation; Soil Microbiology  Plant Nutrition Acidithiobacillus; Diazotrophic bacteria; Earthworm compost; Plant residue; Sugarcane filter mud cake. Microbiologia e Bioquímica do Solo.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35504

Caracterização fenotípica de rizóbio nativos isolados de solos da Amazônia e eficiência simbiótica em feijão caupi - DOI: 10.4025/actasciagron.v32i1.900
Provedor de dados: 1
Autores: Chagas Junior, Aloisio Freitas; UFT; Oliveira, Luiz Antonio de; INPA; Oliveira, Arlem Nascimento de; INPA.
A fixação biológica do nitrogênio é de fundamental importância na sustentabilidade agrícola, e a caracterização fenotípica rizobial contribui para o conhecimento da sua diversidade em coleções e para a utilização posterior em sistemas agrícolas. O objetivo deste trabalho foi avaliar a diversidade fenotípica de rizóbio isolados de solos da Amazônia e suas eficiências simbióticas quando inoculados em feijão caupi (Vigna unguiculata L. Walp.). Os isolados nativos apresentaram diversidade quanto às características morfológicas e fisiológicas. Foi verificado que a inoculação com isolados de rizóbio nativos contribuiu, de forma significativa, para o aumento da biomassa, nodulação de caupi e em eficiência simbiótica.
Palavras-chave: 5.01.00.00-9    Agronomia diversidade fenotípica; Fixação de nitrogênio; Vigna unguiculata Microbiologia Agrícola phenotype diversity; Nitrogen fixation; Vigna unguiculata.
Ano: 2010
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/900

Azospirillum sp . inoculation in wheat, barley and oats seeds greenhouse experiments
Provedor de dados: 52
Autores: Dalla Santa,Osmar R.; Hernández,Ramona Fernández; Alvarez,Gergina L. Michelena; Ronzelli Junior,Pedro; Soccol,Carlos Ricardo.
The aim of the present work was to evaluate the inoculation effects of Azospirillum sp. RAM-7 strain, in seeds of wheat, barley and oats cultures on yield and total nitrogen content of the grains in greenhouse experiments. Seeds inoculation with Azospirillum sp. RAM-7 strain enhanced grain yields, even so, the responses vary among the evaluated cultures. For wheat, significant increases were obtained when the inoculation was associated to 100% of the recommended nitrogen, although the treatment that received only inoculation produced 7.4% above the control, however this difference wasn't significant. For barley, the presence of the inoculant substituted 20% the recommended nitrogen fertilization. For oats the inoculation with Azospirillum sp. RAM-7 didn't...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Azospirillum; Wheat; Barley; Oats; Nitrogen fixation; Plant growth promotion.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000600002

Growth of Crotalaria juncea L. supplied with mineral nitrogen
Provedor de dados: 52
Autores: Mendonça,Elenira Henrique Miranda; Schiavinato,Marlene Aparecida.
Plants of Crotalaria juncea inoculated with Rhizobium were treated with nutrient solution containing 10 or 20mg of either N/NO3 or N/NH4.plant-1.week-1 . The control plants received nutrient solution without N. An investigation was conducted on the effect of these sources of N on growth and nitrogen fixation of plants with 30, 60 and 90 days after sowing (DAS). Those that received mineral N presented higher growth than -N plants, but the presence of nodules occurred in all the treatments. Plants treated with NH4 presented higher N content until 60 days. The highest concentrations of leghemoglobin and protein in nodules were found at 30 DAS and there was no difference in leghemoglobin content between treatments for any age and in protein from 60 DAS....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ammonium; Nitrate; Rhizobium; Nitrogen fixation.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000200003

Effect of ATP and 2-oxoglutarate on the in vitro interaction between the NifA GAF domain and the GlnB protein of Azospirillum brasilense
Provedor de dados: 56
Autores: Sotomaior,P.; Araújo,L.M.; Nishikawa,C.Y.; Huergo,L.F.; Monteiro,R.A.; Pedrosa,F.O.; Chubatsu,L.S.; Souza,E.M.
Azospirillum brasilense is a diazotroph that associates with important agricultural crops and thus has potential to be a nitrogen biofertilizer. The A. brasilense transcription regulator NifA, which seems to be constitutively expressed, activates the transcription of nitrogen fixation genes. It has been suggested that the nitrogen status-signaling protein GlnB regulates NifA activity by direct interaction with the NifA N-terminal GAF domain, preventing the inhibitory effect of this domain under conditions of nitrogen fixation. In the present study, we show that an N-terminal truncated form of NifA no longer required GlnB for activity and lost regulation by ammonium. On the other hand, in trans co-expression of the N-terminal GAF domain inhibited the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Azospirillum brasilense; NifA protein; GlnB protein; GAF domain; Nitrogen fixation.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2012001200005

Diversity of 16S rRNA genes from bacteria of sugarcane rhizosphere soil
Provedor de dados: 56
Autores: Pisa,G.; Magnani,G.S.; Weber,H.; Souza,E.M.; Faoro,H.; Monteiro,R.A.; Daros,E.; Baura,V.; Bespalhok,J.P.; Pedrosa,F.O.; Cruz,L.M.
Sugarcane is an important agricultural product of Brazil, with a total production of more than 500 million tons. Knowledge of the bacterial community associated with agricultural crops and the soil status is a decisive step towards understanding how microorganisms influence crop productivity. However, most studies aim to isolate endophytic or rhizosphere bacteria associated with the plant by culture-dependent approaches. Culture-independent approaches allow a more comprehensive view of entire bacterial communities in the environment. In the present study, we have used this approach to assess the bacterial community in the rhizosphere soil of sugarcane at different times and under different nitrogen fertilization conditions. At the high taxonomic level, few...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 16S rRNA; Biodiversity; Nitrogen fixation; Bacteria; Sugarcane; Soil.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011001200004

Different responses of the GlnB and GlnZ proteins upon in vitro uridylylation by the Azospirillum brasilense GlnD protein
Provedor de dados: 56
Autores: Araújo,L.M.; Huergo,L.F.; Invitti,A.L.; Gimenes,C.I.; Bonatto,A.C.; Monteiro,R.A.; Souza,E.M.; Pedrosa,F.O.; Chubatsu,L.S.
Azospirillum brasilense is a diazotroph found in association with important agricultural crops. In this organism, the regulation of nitrogen fixation by ammonium ions involves several proteins including the uridylyltransferase/uridylyl-removing enzyme, GlnD, which reversibly uridylylates the two PII proteins, GlnB and GlnZ, in response to the concentration of ammonium ions. In the present study, the uridylylation/deuridylylation cycle of A. brasilense GlnB and GlnZ proteins by GlnD was reconstituted in vitro using the purified proteins. The uridylylation assay was analyzed using non-denaturing polyacrylamide gel electrophoresis and fluorescent protein detection. Our results show that the purified A. brasilense GlnB and GlnZ proteins were uridylylated by...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Azospirillum brasilense; Nitrogen fixation; PII-like protein; GlnD; GlnB; GlnZ.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2008000400006

Application of representational difference analysis to identify genomic differences between Bradyrhizobium elkanii and B. Japonicum species
Provedor de dados: 58
Autores: Soares,René Arderius; Passaglia,Luciane Maria Pereira.
Bradyrhizobium elkanii is successfully used in the formulation of commercial inoculants and, together with B. japonicum, it fully supplies the plant nitrogen demands. Despite the similarity between B. japonicum and B. elkanii species, several works demonstrated genetic and physiological differences between them. In this work Representational Difference Analysis (RDA) was used for genomic comparison between B. elkanii SEMIA 587, a crop inoculant strain, and B. japonicum USDA 110, a reference strain. Two hundred sequences were obtained. From these, 46 sequences belonged exclusively to the genome of B. elkanii strain, and 154 showed similarity to sequences from B. japonicum genome. From the 46 sequences with no similarity to sequences from B. japonicum, 39...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bradyrhizobium; Genome comparison; Nitrogen fixation; Representational difference analysis.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000400036

Nitrogenase activity of Beijerinckia derxii is preserved under adverse conditions for its growth
Provedor de dados: 58
Autores: Barbosa,Heloiza R.; Moretti,Marcos A.; Thuler,Daniela S.; Augusto,Elisabeth F.P.
In order to evaluate the response of Beijerinckia derxii ICB-10 to different environmental factors, growth curves and specific nitrogenase activity were studied. Tested conditions were as follows: a) media with different pH values (2.5, 2.8, 4.2 and 5.7); b) medium supplemented with 230 µM aluminium sulphate; c) media with two different potassium phosphate concentrations (50 mM and 100 mM); d) shaken or still cultures; e) medium supplemented with 40 mM sodium thiosulphate. Growth curves and specific nitrogenase activity at pH 4.2 were closely similar to those for cultures at pH 5.7 (standard condition), whereas no growth occurred at pH 2.5. Changes in growth curves and/or specific nitrogenase activity were observed under the following conditions: I) pH 2.8...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beijerinckia; Nitrogenase; Nitrogen fixation; Growth; Environmental factors.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000300007

Symbiotic potential and survival of native rhizobia kept on different carriers
Provedor de dados: 58
Autores: Ruíz-Valdiviezo,Víctor Manuel; Canseco,Lucía María Cristina Ventura; Suárez,Luis Antonio Castillo; Gutiérrez-Miceli,Federico Antonio; Dendooven,Luc; Rincón-Rosales,Reiner.
Native rhizobia are ideal for use as commercial legume inoculants. The characteristics of the carrier used to store the inoculants are important for the survival and symbiotic potential of the rhizobia. The objective of this study was to investigate the effects of peat (PEAT), perlite sugarcane bagasse (PSB), carboxymethyl cellulose plus starch (CMCS), and yeast extract mannitol supplemented with mannitol (YEMM) on the survival, nodulation potential and N2 fixation capacity of the native strains Sinorhizobium mexicanum ITTG R7T and Rhizobium calliandrae LBP2-1T and of the reference strain Rhizobium etli CFN42T. A factorial design (4 × 3) with four repetitions was used to determine the symbiotic potential of the rhizobial strains. The survival of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rhizobia; Inoculants; Nodulation; Nitrogen fixation; Carrier.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000300735

Tricalcium phosphate solubilization and nitrogen fixation by newly isolated Aneurinibacillus aneurinilyticus CKMV1 from rhizosphere of Valeriana jatamansi and its growth promotional effect
Provedor de dados: 58
Autores: Chauhan,Anjali; Guleria,Shiwani; Balgir,Praveen P.; Walia,Abhishek; Mahajan,Rishi; Mehta,Preeti; Shirkot,Chand Karan.
Abstract Aneurinibacillus aneurinilyticus strain CKMV1 was isolated from rhizosphere of Valeriana jatamansi and possessed multiple plant growth promoting traits like production of phosphate solubilization (260 mg/L), nitrogen fixation (202.91 nmol ethylene mL-1 h-1), indole-3-acetic acid (IAA) (8.1 µg/mL), siderophores (61.60%), HCN (hydrogen cyanide) production and antifungal activity. We investigated the ability of isolate CKMV1 to solubilize insoluble P via mechanism of organic acid production. High-performance liquid chromatography (HPLC) study showed that isolate CKMV1 produced mainly gluconic (1.34%) and oxalic acids. However, genetic evidences for nitrogen fixation and phosphate solubilization by organic acid production have been reported first time...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Valeriana jatamansi; Phosphate solubilization; Nitrogen fixation; Glucose dehydrogenase; Aneurinibacillus aneurinilyticus; PGPR.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822017000200294