Principles of anaerobic green fodder ensiling
Silage making preserves the nutritive value of seasonal green forage through natural bacterial fermentation.
- Anaerobic Fermentation: Beneficial lactic acid bacteria convert plant sugars into lactic acid under oxygen-free conditions.
- pH Reduction: Rapid acidification drops fodder pH below 4.2, inhibiting mold, yeast, and putrefactive bacterial growth.
- Moisture Optimization: Best ensiling occurs when chopped forage contains 65% to 70% moisture (milky-dough grain stage).
- Nutrient Retention: Preserves high levels of protein, digestible energy, and carotene compared to sun-dried dry straw.
Step-by-step fodder packing in silage bags
Proper compaction and airtight sealing are critical to avoid air pockets that cause spoilage.
- Harvesting & Chopping: Harvest maize or sorghum at the 50% milk-line cob stage; chop into 1.5 to 2.5 cm lengths using a chaff cutter.
- Filling and Compaction: Fill the silage bag in layers of 30 to 40 cm, pressing and tamping down firmly to expel trapped air.
- Inoculants: Add molasses (1% to 2%) or commercial lactic acid bacterial cultures if forage sugar levels are low.
- Airtight Sealing: Tie the bag opening tightly with strong twine, seal with UV-resistant tape, and inspect for punctures.
- Fermentation Time: Silage is fully cured and ready for feeding after 45 to 60 days of undisturbed anaerobic storage.
Feeding practices and dairy benefits
Feeding balanced silage maintains high milk fat and solid-not-fat (SNF) during forage lean periods.
- Gradual Introduction: Introduce silage gradually into dairy rations over 7 to 10 days to allow rumen microbes to adapt.
- Feeding Rate: Feed 15 to 25 kg of fresh silage per adult milch animal daily along with dry roughage and balanced mineral mixture.
- Daily Unloading: Open bags only during feeding times and reseal promptly to prevent aerobic spoilage and heating.
- Subsidies: Financial assistance for silage bags and baling machines is available under the National Livestock Mission (NLM).
Official source
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Department of Animal Husbandry and Dairying (DAHD) ↗Related on KisanPe
Common questions
What crops are best suited for making silage in bags?
Fodder maize, sweet sorghum, pearl millet, and hybrid napier grass are the best crops for silage making due to their high soluble sugar content.
How long does silage remain preserved in sealed silage bags?
Silage stored in high-grade, puncture-free UV-stabilized bags remains preserved and highly nutritious for 12 to 18 months.
Can spoiled or moldy silage be fed to dairy cows?
No, moldy or discolored silage contains mycotoxins that cause digestive disorders, abortion, and milk drop; discard any moldy portions.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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