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Wheat yield in the Cerrado as affected by nitrogen fertilization and inoculation with Azospirillum brasilense PAB
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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Influência de fontes de nitrogênio sobre o desenvolvimento das gemas axilares de explantes caulinares de Chrysanthemum morifolium Ramat. cultivado in vitro Rev. Bras. Bot.
MARQUES,DANIELA DE ARGOLLO; SHEPHERD,SIMONE LILIANE KIRSZENZAFT; CROCOMO,OTTO JESU.
Foram testadas diferentes fontes de nitrogênio na indução e enraizamento de brotações axilares de Chrysanthemum morifolium. Manteve-se constante o teor de nitrogênio total (60 mM) em todos os tratamentos realizados, variando-se apenas as fontes nitrogenadas. O tratamento E1 constituiu-se do meio MS (Murashige & Skoog 1962) completo. Os demais tratamentos foram: E2 = amônio; E3 = nitrato; E4 = nitrato+uréia (1,65 mM); E5 = nitrato+uréia (3,33 mM); E6 = uréia; E7 = uréia+glutamina e E8 = glutamina. Em nenhum tratamento foram adicionados fitorreguladores. No tratamento E1 houve um favorecimento de desenvolvimento de plantas de crisântemo in vitro tanto da parte aérea como de raízes. Porém, a utilização apenas de nitrato como única fonte de nitrogênio...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chrysanthemum; Nitrogen sources; Multiplication in vitro.
Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041998000200005
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MANAGEMENT OF IRRIGATION AND NITROGEN FERTILIZERS TO REDUCE AMMONIA VOLATILIZATION Rev. Bras. Ciênc. Solo
Viero,Fernando; Bayer,Cimélio; Vieira,Renan Costa Beber; Carniel,Eduardo.
ABSTRACT Nitrogen losses by ammonia (NH3) volatilization can be reduced by appropriate irrigation management or by alternative N sources, replacing urea. The objective of this study was to evaluate the efficiency of irrigation management and N source combinations in decreasing NH3 volatilization from an Argissolo Vermelho Distrófico típico cultivated for 28 years with black oat (Avena strigosa) and maize (Zea mays), under no-tillage in the region of Depressão Central, Rio Grande do Sul, Brazil. The experiment was arranged in a randomized block design with split plots with three replications, where the main plots consisted of irrigation systems: no irrigation; irrigation immediately before and irrigation immediately after fertilization. The subplots were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Nitrogen sources; N fertilization; N losses.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000601737
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Growth and content of Spirulina platensis biomass chlorophyll cultivated at different values of light intensity and temperature using different nitrogen sources BJM
Danesi,Eliane Dalva Godoy; Rangel-Yagui,Carlota Oliveira; Sato,Sunao; Carvalho,João Carlos Monteiro de.
The effects of light intensity and temperature in S. platensis cultivation with potassium nitrate or urea as nitrogen source were investigated, as well as the biomass chlorophyll contents of this cyanobacteria, through the Response Surface Methodology. Experiments were performed at temperatures from 25 to 34.5ºC and light intensities from 15 to 69 µmol photons m-2 s-1, in mineral medium. In cultivations with both sources of nitrogen, KNO3 and urea, statistic evaluation through multiple regression, no interactions of such independent variables were detected in the results of the dependent variables maximum cell concentration, chlorophyll biomass contents, cell and chlorophyll productivities, as well as in the nitrogen-cell conversion factor. In cultivation...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Spirulina platensis; Light intensity; Temperature; Nitrogen sources; Chlorophyll.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000100046
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