Abstract
Greenhouse gas (GHG) emissions from agricultural settings have come under great scrutiny in the past 20 years and the impact of GHGs in the environment regarding global climate change is alarming. Understanding the conditions and mechanisms that produce GHGs, specifically methane (CH4), are needed to better attenuate the release of CH4 from various agronomic practices in agricultural settings, particularly from rice (Oryza sativa L.) production.
Highlights
Global climate change will be one of the foremost challenges for humankind over the 50 years [1]
Studies like the present study will continue to be necessary to conduct under field conditions to further refine current knowledge regarding factors affecting CH4 emissions in regions of concentrated rice production, such as is eastern Arkansas. This field study was the first to examine the effects of tillage (CT and NT), NBPT rate, and their interaction on CH4 fluxes and emissions from a pure-line rice cultivar grown in a silt-loam soil in the direct-seeded, delayed-flood production system in east-central Arkansas
CH4 fluxes were greater from NT than conventional tillage (CT) at times over the 2017 rice growing season and were unaffected by NBPT rate
Summary
Global climate change will be one of the foremost challenges for humankind over the 50 years [1]. As air temperatures increase globally and the human population rises, developing new techniques to improve or sustain soil health and water resources will become necessary for continued survival [1]. Developing alternative agronomic techniques will be paramount for increasing agricultural production, as well as reducing climate-change drivers, such as greenhouse gas (GHG) emissions. Rising levels of the main naturally and anthropogenically produced GHGs [i.e., carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O)] are clear when contrasting a baseline of pre-Industrial Revolution concentrations with recently recorded concentrations, which set record levels unseen for the last 800,000 years [1]. Total US GHG emissions increased by 8.4% from 1990 to 2010 [1]
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