IRRI Education trains scientists in measuring and monitoring GHGs for mitigation

Los Baños, Laguna, Philippines — November 29, 2024 Rice production is a significant source of a greenhouse gas (GHG) called methane (CH4), accounting for up to 20% of national GHG inventories. Given the urgent need for climate action, mitigating GHG emissions from rice farming has become a critical global policy objective. Accurate measurement of emissions is essential for developing effective mitigation strategies, tracking progress, and ensuring that global climate targets are met.

Hosted at IRRI’s headquarters in Los Baños, IRRI Education conducted a “GHG Emissions in Rice Systems: Basics of Mechanisms and Standards for Measurement” course last November 29, 2024, which brought together 30 participants from India, Japan, Pakistan, Bangladesh, Cambodia, Benin, and the Philippines. The course aimed to enhance expertise in measuring greenhouse gas emissions from rice-based systems and explore effective mitigation strategies.

“Methane is 28 times more potent than carbon dioxide (CO2)”, said IRRI Senior Associate Scientist Olivyn Angeles, “Currently, it is at 1908.61 parts per billion (ppb) which, compared to the pre-industrial levels of 600-700, is very huge [increase] already.”, she continued.

In rice systems, a field may produce more greenhouse gas than when a person drives a car. IRRI Senior Scientist Ando Radanielson explains that on average, a rice field in the Philippines produces 1.46 kg of methane per hectare during the dry season. This emission is approximately equivalent to the carbon dioxide produced when a person drives a car for about 31,500 km.

IRRI Interim Head of Sustainable Impact through Rice-based Systems (SIRS), Dr. Virender Kumar, emphasized the urgency of addressing climate change. “To mitigate its worst effects, we must limit global warming to below 1.5°C.” To achieve this, sustainable rice farming practices need to be adopted on a wider scale.

In addition to GHG measurement techniques, participants learned about mitigation practices like Alternate Wetting and Drying (AWD), which can significantly reduce methane emissions. Through AWD, fields are periodically drained and re-flooded, reducing irrigation costs. This method has effectively mitigated GHG emissions in rice production up to 30-70% with no reduction in yield. This is because when the field is drained and dried, the growth of methane-producing bacteria is inhibited resulting in a reduction in GHG emission.

The course also highlighted the importance of standardized emissions data for policy development and climate finance initiatives. Through capacity-building initiatives like this, IRRI aims to promote climate change mitigation through sustainable rice production. The training will be offered again in 2025, further strengthening efforts to tackle GHG emissions in rice farming.

Interested in designing a similar course for your organization? Email us at education@irri.org