Production and levels of foliar nitrogen in rocket salad fertilized with controlled-release nitrogen fertilizers and urea
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Data
2011-06
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Resumo
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 significant polynomial regressions for the production of
rocket salad fresh leaf mass and levels of foliar nitrogen, whereby
Entec 26 ® did not show significant polynomial regression, considering
the last parameter evaluated. The production of rocket salad dry leaf
mass did not display significant linear regressions. The maximal
production of rocket salad fresh leaf mass was reached at doses of
600, 490, 765, and 462 kg ha -1 of N with the use of urea, Entec 26 ® ,
Kimcoat N ® and Super N ® , respectively.
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Eruca sativa, Coated urea, Urease inhibitor, Eruca sativa, Uréia revestida, Inibidor de urease
Citação
RATKE, Rafael Felippe; VERGINASSI, Adriana; BASTO, Débora de C.; MORGADO, Hélber S.; SOUZA, Milena R. F. de; FERNANDES, Eliana Paula. Production and levels of foliar nitrogen in rocket salad fertilized with controlled-release nitrogen fertilizers and urea. Horticultura Brasileira, Vitória da Conquista, v. 29, n. 2, p. 246-249, Apr./June 2011.