Soil Moisture, Temperature, and Oxidation-Reduction Potential Fluctuations across a Furrow-Irrigated Rice Field on a Silt-Loam Soil

Authors

Diego Della Lunga, University of Arkansas, FayettevilleFollow
Kristofor R. Brye, University of Arkansas, FayettevilleFollow
Jordan M. Slayden, University of Arkansas, FayettevilleFollow
Christopher G. Henry, Rice Research Extension Center
Lisa S. Wood, University of Arkansas, Fayetteville

Document Type

Article

Publication Date

8-2020

Keywords

Soil volumetric water content, Soil redox potential, Environmental parameters

Abstract

Alternative water management practices for rice (Oryza sativa) production have been developed for water conservation purposes, such as the furrow-irrigated rice production system, which results in variable volumetric water content (VWC), temperature, and oxidation-reduction (redox) potential conditions. The spatial and temporal variations in environmental factors can affect greenhouse gas (GHG) emissions. The objective of this field study was to document and evaluate the continuous variations in soil water content, temperature, and redox potential over two growing seasons (2018 and 2019) among site positions (up-, mid-, and down-slope) and tillage treatments [conventional tillage (CT) and no-tillage (NT)] under furrow-irrigated rice on a silt-loam soil (Typic Albaqualf) in eastern Arkansas. Soil volumetric water content, temperature, and redox potential were continuously measured throughout most of the growing season in the top 7.5 cm. The up- and mid-slope positions in 2018 had numerically greater soil VWC under NT than under CT, while the up- and mid-slope positions in 2019 had numerically greater VWC under CT than under NT. The up-slope position experienced more numerous VWC and greater redox fluctuations than the mid-slope position. Variations in soil water contents and redox potential likely had a greater effect on GHG production and potential differential tillage treatment response than soil temperature variations. Research efforts need to focus on quantifying spatial and temporal variations in GHG fluxes throughout a furrow-irrigated rice field and investigate relationships among GHG fluxes and emissions and environmental factors known to influence GHG production, namely soil water content, temperature, and redox potential.

Citation

Della Lunga, D., Brye, K. R., Slayden, J. M., Henry, C. G., & Wood, L. S. (2020). Soil Moisture, Temperature, and Oxidation-Reduction Potential Fluctuations across a Furrow-Irrigated Rice Field on a Silt-Loam Soil. Journal of Rice Research and Developments, 3 (1), 103-114. https://doi.org/10.36959/973/427

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