Reduce Ammonia Barn Smell with Probiotics: Cost Comparison vs Antibiotics

The pungent ammonia smell in chicken barns is a classic problem faced by farmers, especially in closed house systems. Besides disrupting work comfort and neighbor relations, excess ammonia also suppresses chicken performance—reducing body weight, worsening FCR, and increasing mortality. For years, the common solution was antibiotics as growth promoters (AGP), which were also believed to suppress ammonia. However, with the ban on AGP in Indonesia since 2018, farmers have turned to probiotics. The question is: which is cheaper and more effective for reducing ammonia barn smell? This article presents a cost-benefit comparison between antibiotics and probiotics, using the case study of the Formula Probiotik Ayam Pedaging product from Biosolution.

Why Is Ammonia Smell Dangerous for Chickens and Farmers?

Ammonia (NH₃) is produced from the decomposition of uric acid in feces by urease bacteria. At high concentrations (>25 ppm), ammonia irritates the chicken's respiratory tract, damages tracheal cilia, and triggers chronic respiratory diseases. In the long term, chickens experience reduced feed intake, slow growth, and increased susceptibility to secondary infections.

For farmers, ammonia is also dangerous. Chronic exposure causes eye and lung irritation, even the risk of long-term respiratory diseases. Additionally, strong ammonia odor can trigger complaints from nearby residents, especially in barns close to settlements. Therefore, reducing chicken barn ammonia smell is not just about comfort, but also productivity and health.

Mechanism Comparison: Antibiotics vs Probiotics in Suppressing Ammonia

Antibiotics (AGP)

Antibiotics were previously used as growth promoters by suppressing pathogenic bacteria and reducing immune load. The effect on ammonia is indirect: by suppressing total gut bacteria, including urease-positive bacteria such as Clostridium and E. coli, ammonia production decreases. However, this effect is temporary and non-selective. Antibiotics also kill beneficial bacteria, so after discontinuation, the population of pathogenic and urease-positive bacteria can rebound more quickly.

Probiotics

Probiotics work through several mechanisms to suppress ammonia directly and sustainably:

1. Competitive exclusion: Probiotic bacteria such as Lactobacillus acidophilus and Bacillus subtilis compete with urease-positive bacteria for attachment sites and nutrients, thereby reducing the population of ammonia-producing bacteria.
2. Gut pH reduction: L. acidophilus produces lactic acid which lowers gut pH, inhibiting the growth of pathogenic bacteria and urease activity.
3. Digestive enzymes: Bacillus subtilis and Bacillus coagulans produce protease, amylase, and cellulase enzymes that improve feed digestibility. The better the feed is digested, the less substrate (uric acid) remains to be converted into ammonia.
4. Immunomodulation: Probiotics stimulate mucosal IgA production, strengthen the gut barrier, and reduce inflammation that can increase ammonia production.

With these mechanisms, probiotics not only suppress ammonia but also improve overall chicken performance.

Cost Analysis: Antibiotics vs Probiotics for Reducing Ammonia

For cost comparison, we take the example of a farmer with a population of 10,000 broiler chickens, rearing period of 35 days. Assume antibiotic price (e.g., colistin or oxytetracycline) around Rp 50,000 per kg of feed, with a dosage of 500 grams per ton of feed. Meanwhile, the probiotic Formula Probiotik Ayam Pedaging with a dosage of 2 ml/kg feed, price around Rp 30,000 per liter (equivalent to Rp 60 per ml).

Antibiotic Cost

• Dosage: 0.5 kg/ton feed
• Total feed per cycle (assuming 3,200 kg for 10,000 birds): 3.2 tons
• Antibiotic requirement: 1.6 kg
• Price per kg: Rp 50,000
• Total antibiotic cost: Rp 80,000

Probiotic Cost

• Dosage: 2 ml/kg feed = 2 liters/ton
• Total feed: 3.2 tons → probiotic requirement: 6.4 liters
• Price per liter: Rp 30,000
• Total probiotic cost: Rp 192,000

At first glance, probiotics are 2.4 times more expensive. However, the above calculation does not include the cost of losses due to ammonia and the additional benefits of probiotics.

Hidden Costs of Antibiotics

1. Residues and sanctions: Antibiotic use leaves residues in meat. If detected during market testing, farmers can suffer huge losses (meat rejected, fines, or price reduction).
2. Ammonia smell remains high: Research shows ammonia reduction with antibiotics is only about 10-20%, while probiotics can reach 30-50% (Biosolution internal data). The still disturbing odor requires additional costs for fans, exhausts, or ammonia-neutralizing disinfectants.
3. Antibiotic resistance: Long-term use leads to bacterial resistance, so dosages need to be increased and costs escalate.
4. Higher mortality: Without probiotics, mortality is usually 5-7%. With probiotics, target mortality is <3%.

Financial Benefits of Probiotics

• FCR improvement 8-12%: If standard FCR is 1.6, with probiotics it drops to 1.47. For 10,000 birds with harvest weight of 1.8 kg, total weight is 18,000 kg. Feed savings = (standard FCR - probiotic FCR) × total weight = (1.6-1.47) × 18,000 = 2,340 kg feed. Feed price Rp 8,000/kg, then savings = Rp 18,720,000.
• ADG increase 5-10%: Harvest time can be 2-3 days faster, saving electricity, labor, and feed costs.
• Mortality reduction: Difference of 3% (5% vs 2%) = 300 birds saved × selling price Rp 30,000 = Rp 9,000,000.

If summed, the additional benefits from probiotics far exceed the initial cost difference of Rp 112,000. Probiotic investment provides positive ROI.

Case Study: Biosolution Formula Probiotik Ayam Pedaging

Formula Probiotik Ayam Pedaging contains three superior strains:

• Lactobacillus acidophilus: lowers gut pH and produces lactic acid.
• Bacillus subtilis: produces enzymes that improve feed digestibility.
• Bacillus coagulans: heat-resistant spores, stable in pelleted feed.

Application: 1 ml/L drinking water or 2 ml/kg feed. For starter chickens, it is given daily, while for grower-finisher, 3 times a week. With this dosage, farmers report a reduction in ammonia smell of up to 40% in the first week, accompanied by increased appetite and body weight.

Other Factors Affecting Ammonia Smell

Besides probiotics, barn management is also important:

• Ventilation: Ensure adequate air circulation to remove ammonia.
• Stocking density: Avoid overcrowding to prevent feces accumulation.
• Feed quality: Feed with easily digestible protein reduces uric acid production.
• Drinker hygiene: Clean drinking water prevents the growth of urease bacteria.

Probiotics work synergistically with these factors. Without good management, probiotic effectiveness can be reduced.

Conclusion

Although the direct cost of probiotics is higher than antibiotics, the long-term benefits of probiotics—improved FCR, reduced mortality, decreased ammonia smell, and residue-free—are far greater. Probiotics are a sustainable solution that not only reduces chicken barn ammonia smell but also increases farm profitability. With products like Formula Probiotik Ayam Pedaging from Biosolution, farmers can switch from antibiotics to probiotics with confidence.

For more information and free consultation, contact the Biosolution technical team via WhatsApp. Also see related product: Formula Probiotik Ayam Kampung & KUB.