SciELO - Scientific Electronic Library Online

 
vol.18 número2A comparative study of phosphorus availability in an acidic soil and an alkaline soil amended with organic and inorganic phosphorus sourcesNothofagus pumilio forest affected by recent tephra deposition in northern Patagonia. I- Environmental traits influencing seedling growth índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Revista

Articulo

Indicadores

Links relacionados

  • En proceso de indezaciónCitado por Google
  • No hay articulos similaresSimilares en SciELO
  • En proceso de indezaciónSimilares en Google

Compartir


Journal of soil science and plant nutrition

versión On-line ISSN 0718-9516

Resumen

ALFARO, Marta et al. Ammonia and nitrous oxide emissions as affected by nitrification and urease inhibitors. J. Soil Sci. Plant Nutr. [online]. 2018, vol.18, n.2, pp.479-486. ISSN 0718-9516.  http://dx.doi.org/10.4067/S0718-95162018005001501.

Nitrogen (N) gaseous losses have environmental and economic implications. Ammonia (NH3) volatilization and nitrous oxide (N2O) emissions from a volcanic soil were concurrently quantified using intact lysimeters, after application of the equivalent to 100 kg N ha-1 with and without urease (NBPT) and nitrification (DCD) inhibitor: Urea, Urea+NBPT, Urea+DCD, Dairy slurry and Dairy slurry+DCD. A control treatment (-N) was also included. Treatments were distributed on a randomized block design and evaluated during 28 days. Ammonia was analyzed for NH4 by colorimetry, while N2O was estimated by gas chromatography. Total emissions were estimated by addition of daily fluxes, and results were analyzed by ANOVA.

Ammonia was the main N loss, with 35 to 43% and 5% to 16% of the total N applied in Urea and Dairy slurry (P<0.01), respectively, with and without inhibitors (P>0.05). The use of DCD reduced N2O emissions by 44 and 8% in the same treatments, respectively (P<0.05). Results suggest that DCD has a potential as a mitigation option in grassland volcanic soils reducing N2O losses. The use of NBPT did not reduce NH3 losses and N2O emissions when applied with urea. Concurrent N gasses losses from soil showed that indirect N2O losses following NH3 volatilization might be more relevant in volcanic soils than direct N2O losses.

Palabras clave : Ammonia volatilization; nitrous oxide emissions; NBPT; DCD; Ultisol.

        · texto en Inglés     · Inglés ( pdf )