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| Rech,Ioná; Polidoro,José Carlos; Pavinato,Paulo Sérgio. |
| Abstract: The objective of this work was to develop urea-based fertilizers with internal incorporation of urease inhibitors and other additives in the granule. The effects of the incorporation of NBPT, copper (Cu+2), boric acid (H3BO3), elemental sulphur (Sº), and a clay mineral from the zeolite group in powder urea - with ten different combinations of these additives - were evaluated as to N losses by volatilization and leaching. The losses in laboratory-developed formulations were compared with those of commercial fertilizers coated with the same additives (Super N, FH Nitro Mais, and FH Nitro Gold). The evaluations were made in greenhouse conditions, using a Ultisol accommodated in PVC columns. Nitrate and ammonium leaching was evaluated in the solution... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ammonia volatilization; Leaching; NBPT; Nitrogen fertilizers; Urease inhibitors. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000300194 |
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| Zavaschi,Eduardo; Faria,Letícia de Abreu; Vitti,Godofredo Cesar; Nascimento,Carlos Antonio da Costa; Moura,Thiago Augusto de; Vale,Diego Wyllyam do; Mendes,Fernanda Latanze; Kamogawa,Marcos Yassuo. |
| A form of increasing the efficiency of N fertilizer is by coating urea with polymers to reduce ammonia volatilization. The aim of this study was to evaluate the effect of polymer-coated urea on the control of ammonia volatilization, yield and nutritional characteristics of maize. The experiment was carried out during one maize growing cycle in 2009/10 on a Geric Ferralsol, inUberlândia, MG, Brazil. Nitrogen fertilizers were applied as topdressing on the soil surface in the following urea treatments: polymer-coated urea at rates of 45, 67.5 and 90 kg ha-1 N and one control treatment (no N), in randomized blocks with four replications. Nitrogen application had a favorable effect on N concentrations in leaves and grains, Soil Plant Analysis Development (SPAD)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nitrogen; Polymer-coated urea; N fertilizer; Ammonia volatilization; Zea mays; SPAD reading. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000400016 |
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