Dr. Michele L. Reba

Research Hydrologist, Acting Research Leader|USDA-ARS

2024 Abstract - FIELD-SCALE GREENHOUSE GAS EMISSIONS AND WATER QUALITY IN MID-SOUTH RICE PRODUCTION: A study combining irrigation management in rice/soybean rotation at the field-scale was undertaken in 2022 and 2023 in collaboration between Arkansas producers Jerry Don and Tommy Clark, USDA-NRCS, and USDA-ARS-Delta Water Management Research Unit. The study fields were part of a larger farm operation near Otwell, AR. The study aimed to link runoff water quality and measured greenhouse gas emissions. During the rice year of 2023, irrigation water management treatments were multiple-inlet, and multiple-inlet plus alternate wetting and drying (AWD). AWD allows the applied irrigation water to subside until the field gets to a “wet mud” state at which time the field is re-flooded. Conventional flooding maintains a constant flood on the crop from the V4-V5 growth stage (4-5 leaf stage) until the R7 growth stage. Several parameters were measured throughout the field season and include water applied, production costs, greenhouse gas emissions, runoff water quality (including excess nutrients and sediment), yield, and plant growth. Understanding how emissions are related to runoff water quality will help link these two important parameters together, especially in this era of climate smart efforts across the globe.

Phone: 870-680-8256

Cell Phone: 870-819-2708

Address: Delta Water Management Research Unit
504 University Loop E
Jonesboro, AR 72401

Email: michele.reba@ars.usda.gov

2024 Conference is Being Updated Daily.

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