Silkworm frass, also known as silkworm excrement, is highly nutritious, with a crude protein content of 15.4%, which ranks just below bran and surpasses rice bran and grass. This makes it an excellent feed option for livestock and poultry. Farmers who use silkworm frass in animal diets often report positive results.
1. **Feeding pigs with silkworm frass**: It helps reduce the amount of fine feed needed, allowing pigs to gain weight quickly within a short time frame and improving their slaughter rate. Sows that consume silkworm frass tend to produce more milk after excreting.
2. **Feeding sheep with silkworm frass**: It increases milk production in goats and improves wool yield. Sheep fed with silkworm frass can grow hair longer than 14 cm, making it beneficial for wool production.
3. **Feeding cattle with silkworm frass**: It enhances the resilience and overall health of cattle, helping them stay stronger and more energetic.
4. **Feeding rabbits with silkworm frass**: Rabbits tend to accumulate more fat and have lower water content, which can be advantageous in meat production.
5. **Feeding chickens with silkworm frass**: Adding 5% silkworm frass to chicken feed significantly improves the coloration of egg yolks, enhancing the appearance and market value of the eggs.
6. **Feeding fish with silkworm frass**: Fish raised on silkworm frass experience fewer diseases and grow faster. For every ton of silkworm frass, approximately 100 kilograms of fresh fish can be produced.
Despite its high nutritional value, fresh silkworm frass has a short shelf life and is prone to spoilage and mold. To extend its usability, it should be dried thoroughly to keep moisture content below 15%. Alternatively, it can be stored through ensiling in large containers, cement pits, or other suitable structures, ensuring tight packing to promote lactic acid fermentation.
It’s also important to note that silkworm frass may contain pathogens from infected silkworms. Therefore, when using it as animal feed, it should be stored in a cool, dark place away from direct sunlight, preferably in a silkworm greenhouse or similar controlled environment. Proper handling and storage are essential to maintain quality and ensure safe use.
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