Measurement and mitigation of nitrous oxide emissions from a high nitrogen input vegetable system
Shu Kee Lam, Helen Suter, Rohan Davies, Mei Bai, Jianlei Sun, Deli Chen
Scientific Reports | NATURE PUBLISHING GROUP | Published : 2015
The emission and mitigation of nitrous oxide (N2O) from high nitrogen (N) vegetable systems is not well understood. Nitrification inhibitors are widely used to decrease N2O emissions in many cropping systems. However, most N2O 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 N2O 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..View full abstract
This work was supported by the Federal Department of Agriculture and the Incitec Pivot Ltd. The authors thank the Lamattina group and Mr Russell Lamattina for the use of their farm, Dr Arvin Mosier for his constructive comments on the manuscript, Dr Thomas Flesch for his valuable advice on micrometeorological data processing, Dr Robert Edis, Mr David Riches, Mr Ben Grasso, Mr Trevor Coates, Mr Muhammad Shakir, Mr Paul Jaques, Dr Jagrati Singh and Dr Xing Chen for field assistance, soil chemical and gas analyses.