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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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| Pereira,Hamilton Seron; Leão,Anabelisa Ferreira; Verginassi,Adriana; Carneiro,Marco Aurélio Carbone. |
| The aim of this study was to evaluate the N losses due to volatilization at different rates of common urea, polymer coated urea and urease inhibitor-treated urea in the out-of-season corn, using semi-open static collectors. The treatments consisted of N levels on side-dressing fertilization with urea in different treatments: (a) control (without N), (b) urea 40 kg ha-1 N, (c) urea 80 kg ha-1 N, (d) polymer coated urea 40 kg ha-1 N, (e) polymer coated urea 80 kg ha-1 N and (f) urea with the urease inhibitor (UI) N 80 kg ha-1 N. The results showed that the treatments with polymer coated urea and with urease inhibitor-treated urea reduced the volatilization of N around 50 % compared to common urea, either in the first and the second N side-dressing... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nitrogen; Nitrogen fertilization; Slow release. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000600017 |
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