Measured and simulated nitrogen fluxes after field application of food-processing and municipal organic wastes

Journal of Environmental Quality
V ParnaudeauB Nicolardot

Abstract

The aims of this study were to (i) assess N fluxes (mineralization, volatilization, denitrification, leaching) caused by spreading various organic wastes from food-processing industries during a field experiment, and (ii) to identify the main factors affecting N transformation processes after field spreading. Experimental treatments including the spreading of six types of waste and a control soil were set up in August 2000 and studied for 22 mo under bare soil conditions. Ammonia and nitrous oxide emissions, and nitrogen mineralization were measured in experimental devices and extrapolated to field conditions or computed in calculation models. The ammonia emissions varied from 80 to 580 g kg(-1) NH4+-N applied, representing 0 to 90 g N kg(-1) total N applied. Under these meteorologically favorable conditions (dry and warm weather), waste pH was the main factor affecting volatilization rates. Cumulated N2O-N fluxes were estimated at 2 to 5 g kg(-1) total N applied, which was quite low due to the low soil water content during the experimental period; water-filled pore space (WFPS) was confirmed as the main factor affecting N2O fluxes. Nitrogen mineralization from wastes represented 126 to 723 g N kg(-1) organic N added from the i...Continue Reading

References

Jan 16, 2002·Journal of Environmental Quality·L Barton, L A Schipper
Jul 1, 2004·Journal of Environmental Quality·Y MasterA Shaviv
Sep 10, 2004·Journal of Environmental Quality·Virginie ParnaudeauJérôme Pagès

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Citations

Apr 15, 2011·Journal of Environmental Quality·K I KostyanovskyW L Daniels
Sep 27, 2018·The Science of the Total Environment·A ChinR Brackin

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