The Effect Of Nitrification Inhibitors On Soil Ghg Emissions During Post Harvest Cropping Phase

1425 Words Nov 6th, 2015 6 Pages
INFLUENCE OF NITRIFICATION INHIBITORS ON SOIL GHG EMISSIONS DURING POST-HARVEST CROPPING PHASE
Stephen Leo1,*, Melanie Switzer1, Michael Purcell1, Joshua Tomarchio1, Clemens Scheer2
1Science and Engineering Faculty, Queensland University of Technology, Brisbane, QLD 4000, Australia
2Institute for Future Environments, Queensland University of Technology, Brisbane, QLD 4000, Australia
*corresponding author: stephen.leo@connect.qut.edu.au
ABSTRACT
The need to target post-harvest greenhouse gas (GHG) emissions after the incorporation of crop residues is imperative in reducing overall emissions from the cropping season. The application of nitrification inhibitors during the cropping phase has shown potential to reduce post-harvest emissions. However, the efficacy of applying nitrification inhibitors directly to crop residues is unknown.
Therefore, a 20-day laboratory incubation experiment was conducted to evaluate the influence of nitrification inhibitors on N2O, CO2 and CH4 emissions after the incorporation of broccoli crop residues on a heavy-clay, vertosol soil from Gatton, South East Queensland, Australia. Five treatments were investigated including the conventional fresh broccoli residue incorporation, with the addition of three nitrification inhibitors: 3,4-dimethylpyrazole phosphate (DMPP), 3,4-dimethyl pyrazolium glycolate (DMPG), and PIADIN. The incorporation of dry broccoli residues was also investigated. Samples were incubated at 25 ̊C across varying soil moisture…
Open Document