Role of plants in reducing nitrogen losses

Abstract

We are pleased to present this special issue, ‘Role of plants in reducing nitrogen losses’. This issue brings together a group of studies that have focused on the role of crops and forages in mitigating nitrogen (N) losses as either the greenhouse gas (nitrous oxide, N₂O) or water pollutant (nitrate, NO₋₃ ). Currently, the atmospheric concentration of N₂O continues to increase which is of concern due to the fact it is both a potent greenhouse gas and the dominant ozonedepleting substance currently emitted. The release of NO₋₃ into the environment is also of concern due to the potential of NO₋₃ to contribute to eutrophication of waterways, indirect N₂O emissions and contamination of potable water. Nationally, and globally, it is recognised that agriculture contributes to the emissions of both N₂O and NO₋₃ . Subsequently, agricultural systems are being modified and developed to further mitigate the impact of land use on climate change and water quality. Future practice must be informed by robust science that permits an understanding and quantification of the impact of current and future practices