Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/28188
Título: Nitrogen loss by volatilization of nitrogen fertilizers applied to coffee orchard
Título(s) alternativo(s): Perdas de nitrogênio por volatilização de fertilizantes nitrogenados em cultivo de café
Palavras-chave: Coffee arabica
Slow and controlled release and stabilized fertilizers
Ammonium nitrate
Urea
Fertilizantes estabilizados e de liberação controlada
Nitrato de amônio
Ureia
Data do documento: 2016
Editor: Universidade Federal de Lavras
Citação: DOMINGHETTI, A. W. et al. Nitrogen loss by volatilization of nitrogen fertilizers applied to coffee orchard. Ciência e Agrotecnologia, Lavras, v. 40, n. 2, mar./abr. 2016.
Resumo: Ammonia volatilization (N-NH3) is one of the main pathways of Nitrogen loss reducing nitrogen use efficiency in coffee orchard. This work aimed at quantifying ammonia volatilization (N-NH3) losses from N-sources to be used in coffee plantations fertilization in Brazil. The experiment was conducted in the field on a dystrophic red latosol (Ferralsol in FAO's classification) at the Coffee Research Sector, University of Lavras, MG, Brazil. The experimental design was of complete randomized blocks with three repetitions of the following treatments: conventional urea, ammonium nitrate and urea + 0.15% Cu and 0.4% B, urea + anionic polymers, urea + elementary sulfur (S0) + polymers, and urea + plastic resin. These N sources were split into three doses of 150 kg ha-1 and band applied. The N-NH3 losses by volatilization and variations of pH (H2O) were measured, before and after N application. The N-sources contributed to reduce the soil pH, measured after the third nitrogen fertilization. The N-NH3 losses by volatilization (average from three applications) was as follows: urea + anionic polymers (35.8%) > conventional urea (31.2%) = urea + S0 + polymers (31.0%) > urea + 0.15% Cu + 0.4 % B (25.6%) > urea + plastic resin (8.6%) = ammonium nitrate (1.0%).
URI: http://repositorio.ufla.br/jspui/handle/1/28188
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