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Residual recovery and yield performance of nitrogen fertilizer applied at sugarcane planting
Franco, Henrique Coutinho Junqueira; Otto, Rafael; Vitti, André Cesar; Faroni, Carlos Eduardo; Oliveira, Emídio Cantídio de Almeida; Fortes, Caio; Ferreira, Danilo Alves; Kõlln, Oriel Tiago; Garside, Alan Leslie; Trivelin, Paulo Cesar Ocheuze.
Afiliação
  • Franco, Henrique Coutinho Junqueira; Brazilian Bioethanol Science and Tecnology Laboratory. Campinas. BR
  • Otto, Rafael; University of São Paulo. Escola Superior de Agricultura "Luiz de Queiroz". Piracicaba. BR
  • Vitti, André Cesar; São Paulo Agency of Technology for Agribusiness. Piracicaba. BR
  • Faroni, Carlos Eduardo; University of São Paulo. Escola Superior de Agricultura "Luiz de Queiroz". Piracicaba. BR
  • Oliveira, Emídio Cantídio de Almeida; University of São Paulo. Escola Superior de Agricultura "Luiz de Queiroz". Piracicaba. BR
  • Fortes, Caio; University of São Paulo. Centro de Energia Nuclear na Agricultura. Piracicaba. BR
  • Ferreira, Danilo Alves; Brazilian Bioethanol Science and Tecnology Laboratory. Campinas. BR
  • Kõlln, Oriel Tiago; Brazilian Bioethanol Science and Tecnology Laboratory. Campinas. BR
  • Garside, Alan Leslie; James Cook University. Townsville. AU
  • Trivelin, Paulo Cesar Ocheuze; University of São Paulo. Centro de Energia Nuclear na Agricultura. Piracicaba. BR
Sci. agric ; 72(6): 528-534, Nov.-Dec. 2015. tab
Article em En | VETINDEX | ID: biblio-1497522
Biblioteca responsável: BR68.1
Localização: BR68.1
ABSTRACT
ABSTRACTThe low effectiveness of nitrogen fertilizer (N) is a substantial concern that threatens global sugarcane production. The aim of the research reported in this paper was to assess the residual effect of N-fertilizer applied at sugarcane planting over four crop seasons in relation to sugarcane crop yield. Toward this end three field experiments were established in the state of São Paulo, Brazil, during February of 2005 and July of 2009, in a randomized block design with four treatments 0, 40, 80 and 120 kg ha1 of N applied as urea during sugarcane planting. Within each plot, a microplot was established to which 15N-labeled urea was applied. The application of N at planting increased plant cane yield in two of the three sites and sucrose content at the other, whereas the only residual effect was higher sucrose content in one of the following ratoons. The combined effect was an increase in sugar yield for three of the 11 crop seasons evaluated. Over the crop cycle of a plant cane and three ratoon crops, only 35 % of the applied N was recovered, split 75, 13, 7 and 5 % in the plant cane, first, second and third ratoons, respectively. These findings document the low efficiency of N recovery by sugarcane, which increases the risk that excessive N fertilization will reduce profitability and have an adverse effect on the environment.
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