Best techniques to reduce methane emissions in Vietnam’s livestock sector

With a heat-trapping capacity 28 times stronger than CO₂ over a century, methane is a major contributor to global warming and poses a significant challenge to Vietnam’s international emission reduction commitments.

Methane emissions – A challenge from the barn

In recent years, research institutes, enterprises, and farmers have been testing various solutions to cut methane emissions while maintaining productivity. Several techniques have proven effective and are considered the most viable options for broader adoption.

One of the most prominent measures is adjusting livestock diets, especially for cattle and buffalo. When animals consume large amounts of roughage such as grass or rice straw, fermentation in the rumen produces substantial methane.

Supplementing diets with concentrates like grains, cornmeal, soybean meal, or nutritional additives helps improve microbial efficiency in the rumen, reducing emissions.

Special feed additives such as red seaweed have shown the ability to cut up to 80% of methane produced during digestion.

In Vietnam, scientists are also exploring local ingredients, such as palm oil, tea leaf extracts, and tannins from acacia bark – to develop cost-effective, context-appropriate solutions.

Probiotics represent another promising approach. Adding beneficial microbial strains to animal feed can redirect digestive processes, reducing methane formation while improving nutrient absorption. This is both environmentally friendly and productivity-enhancing.

Best available techniques

While dietary improvements help mitigate emissions from digestion, waste management is the key to controlling methane released from barns.

In many smallholder farms, manure and wastewater are still discharged directly into the environment or left to decompose naturally, causing odors, pollution, and greenhouse gas emissions.

The most common technology today is the biogas digester. When manure is placed in an airtight tank, methane generated during decomposition can be captured for use as fuel or electricity, cutting emissions and bringing economic benefits.

Vietnam currently has around 500,000 biogas digesters, but scaling up and upgrading technology is crucial to meet the growing demands of livestock production.

At larger scales, many farms have adopted advanced technologies such as:

• Capturing biogas for electricity generation.
• Separating solid and liquid manure for reuse.
• Integrating circular models that combine livestock and crop production.

Although these methods require higher initial investment, they deliver long-term benefits, enhancing production efficiency and significantly reducing greenhouse gas emissions.

Toward green and sustainable livestock

Another key factor is improving animal productivity. When a cow produces more milk or gains weight faster, methane emissions per unit of output decrease. Hence, genetic improvement and selective breeding are vital for reducing emission intensity while increasing profitability.

Moreover, transforming livestock systems contributes greatly to emission reduction. Semi-intensive models combining stall-feeding and limited grazing, along with balanced rations, help control nutrition and reduce roughage intake.

The digitalization of livestock management is also being piloted in Vietnam, allowing farmers to monitor animal health, feeding, and growth performance for optimized production and lower emissions.

Reducing methane emissions does not mean hindering the livestock sector’s growth. On the contrary, it represents an opportunity to restructure the industry toward modernity, efficiency, and environmental sustainability.

By simultaneously improving feed, waste treatment, breeding, and management, Vietnam can feasibly cut methane emissions by at least 30% by 2030, in line with its international commitments.

More importantly, this transformation will help Vietnam’s livestock products meet increasingly stringent green standards in global markets, enhancing export potential and elevating the country’s position on the world’s agricultural map.

It marks a decisive step toward a sustainable, climate-resilient livestock sector that contributes actively to the global fight against climate change.