N2 O and CO2 emissions following repeated application of organic and mineral N fertiliser from a vegetable crop rotation

The Science of the Total Environment
Daniele De RosaP R Grace

Abstract

Accounting for nitrogen (N) release from organic amendments (OA) can reduce the use of synthetic N-fertiliser, sustain crop production, and potentially reduce soil borne greenhouse gases (GHG) emissions. However, it is difficult to assess the GHG mitigation potential for OA as a substitute of N-fertiliser over the long term due to only part of the organic N added to soil is being released in the first year after application. High-resolution nitrous oxide (N2O) and carbon dioxide (CO2) emissions monitored from a horticultural crop rotation over 2.5 years from conventional urea application rates were compared to treatments receiving an annual application of raw and composted chicken manure combined with conventional and reduced N-fertiliser rates. The repeated application of composted manure did not increase annual N2O emissions while the application of raw manure resulted in N2O emissions up to 35.2 times higher than the zero N fertiliser treatment and up to 4.7 times higher than conventional N-fertiliser rate due to an increase in C and N availability following the repeated application of raw OA. The main factor driving N2O emissions was the incorporation of organic material accompanied by high soil moisture while the applicati...Continue Reading

References

Oct 31, 2006·Journal of Environmental Quality·Eric S GaleElizabeth A Myhre
Nov 4, 2010·Journal of Environmental Quality·Martin H ChantignyMarc-Olivier Gasser
Mar 1, 2012·Journal of Environmental Quality·David E PelsterAnne Vanasse
Feb 26, 2013·The Science of the Total Environment·Ramya ThangarajanAnitha Kunhikrishnan
May 29, 2013·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Klaus Butterbach-BahlSophie Zechmeister-Boltenstern
Jun 14, 2014·Proceedings of the National Academy of Sciences of the United States of America·Iurii ShcherbakG Philip Robertson
Jan 24, 2015·The Science of the Total Environment·D W RowlingsS Liu

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