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| Registros recuperados: 68 | |
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| ALCANTARA, R. M. C. M. de; XAVIER, G. R.; ZILLI, J. E.; MARTINS, L. M. V.; RUMJANEK, N. G.; FERNANDES JUNIOR, P. I.; LEITE, J.; SILVA JÚNIOR, E. B. da; SANTOS, C. E. de R. e S.. |
| Fixação biológica de nitrogênio é um processo natural que ocorre pela associação simbiótica entre plantas e microrganismos do solo. Esses microrganismos são bactérias chamadas de diazotróficas, que capturam o nitrogênio do ar e o transformam em formas assimiláveis pelas plantas. |
| Tipo: Capítulo em livro técnico (INFOTECA-E) |
Palavras-chave: Feijão-caupi; Biological nitrogen fixation; Cowpea; Feijão; Fixação de Nitrogênio; Nodulação; Rhizobium; Inoculação. |
| Ano: 2017 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1085761 |
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| ALVES, B. J. R.; ZOTARELLI, L.; ARAÚJO, E. S.; FERNANDES, F. M.; HECKLER, J. C.; MEDEIROS, A. F. A.; BODDEY, R. M.; URQUIAGA, S.. |
| Matéria seca e N total. Quantificação da FBN eficiência do uso de N fertilizante. Balanço de N para as culturas. Resultados e discussão. Quantificação da FBN para a cultura da soja. Eficiência da fertilização. Balança de N para as culturas. O objetivo do presente estudo foi avaliar o impacto da fixação biológica de nitrogênio (FBN) na cultura da soja e a eficiência do uso de fertilizantes nitrogenados pelas culturas do milho e algodão sobre o balanço de N dos solo. O experimento foi realizando em Latossolo Vermelho distroférrico, na área experimental da Embrapa agropecuária oeste, em dourados, MS. Todas as culturas foram conduzidas em uma área onde se iniciou o plantio direto. No primeiro ano , as culturas do milho e algodão receberam 115kg N há-1 ,... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Balanço de nitrogênio; Fixação biológica de nitrogênio; FBN; Zero tillage; Direct sowing; Rotational cropping; Biological nitrogen fixation; BNF; Soybean; Maize.; Algodão; Milho; Plantio Direto; Rotação de Cultura; Soja.; Cotton; Nitrogen balance.. |
| Ano: 2005 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/626863 |
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| Fernandes Júnior,Paulo Ivan; Rohr,Tiago Gusmão; Oliveira,Paulo Jansen de; Xavier,Gustavo Ribeiro; Rumjanek,Norma Gouvêa. |
| The aim of this work was to evaluate the efficiency of carboxymethyl cellulose (CMC) and starch blends as carrier materials of rhizobial inoculants regarding their capacity to maintain viable cells and promote cowpea (Vigna unguiculata) nodulation. The experimental design adopted was completely randomized, with three replicates. Forty different compositions of carboxymethyl cellulose (CMC) with starch, compatibilized or not with different proportions of MgO or ZnO, were evaluated regarding their ability of maintaining rhizobial viable cells during the storage period of one month at room temperature, in an initial screening. Thereafter, selected inoculant carrier blends were evaluated regarding their ability to maintain viable rhizobial cells for a period... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bradyrhizobium japonicum; Vigna unguiculata; Biological nitrogen fixation; Carboxymethyl cellulose; Inoculant technology; Polymer blends. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000900017 |
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| Simões,Welson Lima; Oliveira,Anderson Ramos de; Souza,Moises Alves de; Reis,Verônica Massena; Ivan Fernandes-Júnior,Paulo. |
| Abstract: The objective of this work was to assess the efficiency of the inoculation of a diazotrophic bacterial consortium by the drip irrigation system into sugarcane (Saccharum spp.), in the Brazilian semiarid region. The evaluated treatments were: standard inoculation by submersion; one or two inoculations by drip irrigation; nitrogen (urea) applied by fertigation; and negative controls, without inoculation or nitrogen fertilization. Leaf gas exchanges and plant growth and yield were assessed. Inoculation by irrigation is efficient for all variables, and double inoculation by the drip irrigation system stands out, increasing stem yield in 16% when compared with the negative control, without differing from the treatment with nitrogen fertilizer. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biological nitrogen fixation; Brazilian semiarid region; Inoculant; Plant-growth promoting bacteria. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000103304 |
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| Martins,Júlio César Rodrigues; Freitas,Ana Dolores Santiago de; Menezes,Rômulo Simões Cezar; Sampaio,Everardo Valadares de Sá Barretto. |
| The objective of this work was to estimate the amounts of N fixed by cowpea in a traditional system and by cowpea and gliricidia in an agroforestry system in the Brazilian Northeast semiarid. The experiment was carried out in a randomized complete block design, in a split-plot arrangement, with four replicates, in the semiarid region of the state of Paraíba, Brazil. Plots consisted of agroforestry and traditional systems (no trees), and split-plots of the three crops planted between the tree rows in the agroforestry system. To estimate N fixation, plant samples were collected in the fourth growth cycle of the perennial species and in the fourth planting cycle of the annual species. In the agroforestry system with buffel grass and prickly-pear cactus,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gliricidia sepium; Vigna unguiculata; Biological nitrogen fixation; Natural abundance; 15N.. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2015000200178 |
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| Galindo,Fernando Shintate; Teixeira Filho,Marcelo Carvalho Minhoto; Buzetti,Salatiér; Santini,José Mateus Kondo; Alves,Cleiton José; Ludkiewicz,Mariana Gaioto Ziolkowski. |
| Abstract: The objective of this work was to evaluate the effect of inoculation with Azospirillum brasilense, associated with N rates and sources, in soil of the Cerrado (Brazilian savanna), on the grain yield of irrigated wheat (Triticum aestivum). The experiment was carried out under a no-tillage system in a Typic Haplustox. The experimental design was randomized complete blocks with four replicates, in a 2x5x2 factorial arrangement: two N sources (urea and urea with NBPT urease inhibitor); five N rates applied as topdressing (0, 50, 100, 150, and 200 kg ha-1); and with or without seed inoculation with A.brasilense. The increase in the N rates positively affected spike length, number of spikelets and of grains per spike, number of spikes per meter, N... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Triticum aestivum; Biological nitrogen fixation; Nitrogen sources; No-tillage system; Urease inhibitor. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000900794 |
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| Araújo,Ednaldo da Silva; Silva,Bárbara Fernanda da; Chieza,Emerson Dalla; Urquiaga,Segundo; Guerra,José Guilherme Marinho; Costa,Janaína Ribeiro; Espíndola,Jose Antonio Azevedo. |
| Abstract: The objective of this work was to compare three methods of 15N isotope application to the soil in order to determine the recovery efficiency of nitrogen derived from green manure by corn (Zea mays). The used experimental design was a randomized complete block with six replicates. The treatments consisted of three 15N isotope methods: indirect method I, isotope dilution with 15N-labelled synthetic fertilizer applied through a small hole next to each corn plant; indirect method II, isotope dilution with 15N-labelled synthetic fertilizer spread in the furrow next to the corn planting row; and direct method, application of a legume straw as green manure, treated with 2.23% excess 15N. The green manure used was jack bean (Canavalia ensiformis).... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Biological nitrogen fixation; Legume. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000103201 |
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| Morais,Rafael Fiusa de; Souza,Bruno Juscelino de; Leite,José Marcos; Soares,Luis Henrique de Barros; Alves,Bruno José Rodrigues; Boddey,Robert Michael; Urquiaga,Segundo. |
| The objective of this work was to evaluate elephant grass (Pennisetum purpureum Schum.) genotypes for bioenergy production by direct biomass combustion. Five elephant grass genotypes grown in two different soil types, both of low fertility, were evaluated. The experiment was carried out at Embrapa Agrobiologia field station in Seropédica, RJ, Brazil. The design was in randomized complete blocks, with split plots and four replicates. The genotypes studied were Cameroon, Bag 02, Gramafante, Roxo and CNPGL F06-3. Evaluations were made for biomass production, total biomass nitrogen, biomass nitrogen from biological fixation, carbon/nitrogen and stem/leaf ratios, and contents of fiber, lignin, cellulose and ash. The dry matter yields ranged from 45 to 67 Mg... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pennisetum purpureum; Ash; Agroenergy; Biological nitrogen fixation; Genotype; Lignin. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000200004 |
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| Diniz,Ellen Rúbia; Santos,Ricardo Henrique Silva; Urquiaga,Segundo Sacramento; Peternelli,Luiz Alexandre; Barrella,Tatiana Pires; Freitas,Gilberto Bernardo de. |
| The objective of this work was to determine the effect of incorporation timing of the velvet bean (Stizolobium cinereum) (GM) on both organic broccoli yield and N status. Mineral N content in the soil, biologically fixed N recovery by broccoli, GM biomass decomposition and N release kinetics were also determined. Plots were fertilized with 12 Mg ha-1 of organic compost and received GM either at 0, 15, 30 or 45 days after transplant. Other treatments were compost (12 or 25 Mg ha-1), GM, mineral fertilizers and control (no fertilizer). The data were collected in four completely randomized blocks. GM decomposition increased mineral N content in soil as rapidly as mineral fertilizer or the supply of 25 Mg ha-1 of compost. The N half-life in GM (24 days) is... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brassica oleracea; Stizolobium cinereum; Biological nitrogen fixation; Decomposition rate; N recovery. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2007000200008 |
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| Fernandes-Júnior,Paulo Ivan; Aidar,Saulo de Tarso; Morgante,Carolina Vianna; Gava,Carlos Alberto Tuão; Zilli,Jerri Édson; Souza,Layane Silva Barbosa de; Marinho,Rita de Cássia Nunes; Nóbrega,Rafaela Simão Abrahão; Brasil,Marivaine da Silva; Seido,Sirando Lima; Martins,Lindete Míria Vieira. |
| Plant species that naturally occur in the Brazilian Caatinga(xeric shrubland) adapt in several ways to these harsh conditions, and that can be exploited to increase crop production. Among the strategic adaptations to confront low water availability, desiccation tolerance stands out. Up to now, the association of those species with beneficial soil microorganisms is not well understood. The aim of this study was to characterize Tripogon spicatusdiazotrophic bacterial isolates from the Caatingabiome and evaluate their ability to promote plant growth in rice. Sixteen bacterial isolates were studied in regard to their taxonomic position by partial sequencing of the 16S rRNA gene, putative diazotrophic capacity, in vitro indole-acetic acid (IAA) production and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biological nitrogen fixation; Inoculant; Diazotrophic bacteria; Semi-arid; Desiccation tolerant plants. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000400993 |
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| Registros recuperados: 68 | |
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