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ARS Home » Southeast Area » Jonesboro, Arkansas » Delta Water Management Research » Research » Research Project #441453

Research Project: Conservation Water Management Practice for Reducing Greenhouse Gas Emissions and Sustaining Productivity in Irrigated Rice Systems

Location: Delta Water Management Research

Project Number: 6024-13000-004-023-S
Project Type: Non-Assistance Cooperative Agreement

Start Date: Jan 1, 2022
End Date: Oct 31, 2022

1. Quantify global warming potential (GWP) and yield-scaled GWP (GWPY) of rice selections managed under continuously-flooded and conservation water management i.e. furrow rice irrigation, alternate wetting and drying practice. 2. Compare irrigation water use efficiencies of rice produced using continuous flooding and conservation water management.

We will use the vented flux chamber technique to measure fluxes of carbon dioxide, nitrous oxide and methane from rice fields. Samples collected with static vented chambers will be analyzed for atmospheric gases using a gas chromatograph equipped with three detectors that measure CO2, N2O and CH4 concentrations. These measurements will take place in several fields cultivated in various rice cultivars under conventional and innovative irrigation practices. Innovative irrigation practices include but are not limited to alternate wetting and drying and furrow irrigated rice practice (row rice).