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Measurement and mitigation of nitrous oxide emissions from a high nitrogen input vegetable system.
- Source :
- Scientific Reports; 2/6/2015, p8208, 1p
- Publication Year :
- 2015
-
Abstract
- The emission and mitigation of nitrous oxide (N<subscript>2</subscript>O) from high nitrogen (N) vegetable systems is not well understood. Nitrification inhibitors are widely used to decrease N<subscript>2</subscript>O emissions in many cropping systems. However, most N<subscript>2</subscript>O flux measurements and inhibitor impacts have been made with small chambers and have not been investigated at a paddock-scale using micrometeorological techniques. We quantified N<subscript>2</subscript>O fluxes over a four ha celery paddock using open-path Fourier Transform Infrared spectroscopy in conjunction with a backward Lagrangian stochastic model, in addition to using a closed chamber technique. The celery crop was grown on a sandy soil in southern Victoria, Australia. The emission of N<subscript>2</subscript>O was measured following the application of chicken manure and N fertilizer with and without the application of a nitrification inhibitor 3, 4-dimethyl pyrazole phosphate (DMPP). The two techniques consistently demonstrated that DMPP application reduced N<subscript>2</subscript>O emission by 37-44%, even though the N<subscript>2</subscript>O fluxes measured by a micrometeorological technique were more than 10 times higher than the small chamber measurements. The results suggest that nitrification inhibitors have the potential to mitigate N<subscript>2</subscript>O emission from intensive vegetable production systems, and that the national soil N<subscript>2</subscript>O emission inventory assessments and modelling predictions may vary with gas measurement techniques. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20452322
- Database :
- Complementary Index
- Journal :
- Scientific Reports
- Publication Type :
- Academic Journal
- Accession number :
- 100878591
- Full Text :
- https://doi.org/10.1038/srep08208