This blog was co-authored by Kritee, Jeremy Proville, Terry Loecke, Richie Ahuja
Rice is a critical global crop: it provides livelihood to 150 million households and is a staple for half of humanity. However, it uses 11% of arable land and a third of irrigation water. In addition, continuously flooded rice fields are like wetlands and known to produce about 12% of total anthropogenic methane (CH4), a powerful short-lived greenhouse gas. Despite being one of the few crops whose climate impacts have been deeply studied over two decades, the potential of large emissions of nitrous oxide (N2O), a long-lived greenhouse gas, from rice cultivation was surprisingly missed until recently.
Given that the United Nations Framework Convention on Climate Change (UNFCCC) negotiators working on agricultural mitigation are set to review the issue of water and nitrogen management in early 2019, it is crucial that the climate impacts of rice cultivation are determined and lowered over both the long- and short-term.