Value of copper, zinc, and oxidized charcoal for increasing forage efficiency of urea N uptake

dc.creatorGuimarãesv, Gelton G.F.
dc.creatorMulvane, Richard L.
dc.creatorCantarutti, Reinaldo B.
dc.creatorTeixeira, Breno C.
dc.creatorVergütz, Leonardus
dc.date2018-08-22T18:27:56Z
dc.date2018-08-22T18:27:56Z
dc.date2016-05-15
dc.date.accessioned2023-09-27T20:44:06Z
dc.date.available2023-09-27T20:44:06Z
dc.identifier01678809
dc.identifierhttps://doi.org/10.1016/j.agee.2016.03.036
dc.identifierhttp://www.locus.ufv.br/handle/123456789/21329
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8946661
dc.descriptionVolatilization losses reduce the efficiency of surface-applied urea for crop N uptake, and can be controlled using urease inhibitors to retard hydrolysis or by the presence of other amendments that enhance retention of NH4+ formed by urea hydrolysis. A greenhouse study was conducted to evaluate the effectiveness of oxidized charcoal (OCh; 150 g kg−1 fertilizer) applied with or without Cu and/or Zn (∼0.5–2 g kg−1 fertilizer), and of Cu and/or Zn applied without OCh, for increasing uptake of urea 15N by a common tropical pasture grass, capim-Mombaça (Panicum maximum Jacq. Cv. Mombaça), grown on a coarse-textured Oxisol. Cuttings were collected 5, 14, 28, 42, and 56 days after surface placement of amended or unamended urea pellets to estimate dry matter production, total N uptake, and 15N recovery. Soil sampling was carried out in conjunction with the first and fourth cuts to evaluate exchangeable NH4+ and NO3− concentrations. At the concentrations studied, OCh was more effective than Cu and/or Zn for prolonging NH4+-N availability in urea-treated soil; however, OCh alone or in combination with Zn and Cu had no effect on biomass production or N recovery and can safely be eliminated as a useful option for pasture improvement. The most promising amendment was Zn, which significantly increased total N uptake and the efficiency of urea N fertilization. The use of Zn in conjunction with urea has practical potential to improve forage production on tropical soils.
dc.formatpdf
dc.formatapplication/pdf
dc.languageeng
dc.publisherAgriculture, Ecosystems & Environment
dc.relationv. 224, p. 157- 165, May 2016
dc.rightsElsevier B.V.
dc.subjectForage production
dc.subjectUrease inhibitors
dc.subject15N
dc.subjectZn fertilization
dc.subjectZn-N synergism
dc.titleValue of copper, zinc, and oxidized charcoal for increasing forage efficiency of urea N uptake
dc.typeArtigo


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