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| Marchesan,Enio; Grohs,Mara; Walter,Melissa; Silva,Leandro Souza da; Formentini,Tiago Constante. |
| The use of urea coated with urease inhibitor may become a useful tool for increasing the efficiency of nitrogen top-dressing in rice crop, thereby reducing nutrient losses through volatilization of NH3 (ammonia). Thus, the aim of this study was to evaluate the volatilization of NH3 and the response of rice to the use of urea coated with urease inhibitor in two cropping systems, no-tillage and conventional. For this purpose, field experiments were developed in the agricultural years 2007/2008 and 2008/2009, in UFSM in Santa Maria-RS. The design was randomized blocks in bifactorial scheme (2x5) with two sources, urea and urea + NBPT and five intervals of water intake (0; 3; 6; 9; 12 days) after application of nitrogen sources. The results of two seasons show... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rice cultivation; Urease inhibitor; Use straw in agriculture. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902013000300023 |
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| Galindo,Fernando Shintate; Teixeira Filho,Marcelo Carvalho Minhoto; Buzetti,Salatiér; Santini,José Mateus Kondo; Alves,Cleiton José; Nogueira,Lais Meneghini; Ludkiewicz,Mariana Gaioto Ziolkowski; Andreotti,Marcelo; Bellotte,João Leonardo Miranda. |
| ABSTRACT The biological nitrogen fixation (BNF) process in grasses is caused by diazotrophic bacteria, particularly Azospirillum brasilense. However, studies are lacking on BNF efficiency to define how much mineral nitrogen (N) can be applied to achieve more sustainable high yields. Furthermore, there should be an analysis of whether urea with the urease enzyme inhibitor NBPT is less harmful, benefiting BNF in grasses. The objective of this study was to evaluate the effect of N sources and N rates associated with inoculation with Azospirillum brasilense regarding foliar diagnosis and leaf chlorophyll index (LCI), agronomic efficiency (AE), and corn grain yield in the Cerrado (Brazilian tropical savanna) region. The experiment was conducted in a no-tillage... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L; Urease inhibitor; Nitrogen rates; BNF; No-tillage system. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100526 |
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| Ratke,Rafael Felippe; Verginassi,Adriana; Basto,Débora de C; Morgado,Hélber S; Souza,Milena RF de; Fernandes,Eliana Paula. |
| Controlled-release nitrogen fertilizers enhance crop productivity and decrease nitrogen loss through volatilization and leaching. This study aimed at determining the effect of nitrogen treatments provided by controlled-release nitrogen fertilizers and urea. The following fertilizers were tested: 1 (agricultural urea), 2 (ammonium sulfonitrate + nitrification inhibitor, dimethylpyrazole phosphate (Entec 26®)),3 (urea + Kimberlit polymer (Kimcoat N®)) and 4 (urea + NBPT (Super N - Agrotain®)). Treatments corresponded to 0, 100, 200, 400 and 800 kg ha-1 of N with rocket salad grown inside a greenhouse, assessing the production of fresh and dry leaf mass as well as levels of foliar nitrogen. Doses of different controlled-release nitrogen fertilizers showed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eruca sativa; Coated urea; Urease inhibitor. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362011000200020 |
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| Silva,Douglas Ramos Guelfi; Pereira,André Ferreira; Dourado,Ronaldo Liberato; Silva,Frederico Pinto da; Ávila,Fabrício William; Faquin,Valdemar. |
| The management of nitrogen fertilization is complex due to the various transformations of the nitrogen that occur in the soil-plant-atmosphere system, reducing the efficiency of the fertilization, productivity and the profit margin of the maize production areas. This study aimed to evaluate the effect of different levels of common urea and urea treat with NBPT [N-(n-butyl) thiophosphoric triamide] on the productivity and efficiency of the nitrogen fertilization in maize, correlated with simple economic analysis. The design of the field experiment was in randomized complete blocks with six repetitions, in a 2 x 4 factorial outline, made up of by two sources of nitrogen (urea and NBPT-treated urea) and four levels of nitrogen as top dressing (60, 120, 180... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Zea mays; Nitrogen; Urease inhibitor; Agronomic efficiency; Gross profit margin. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000300012 |
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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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