Silkworm frass, also known as silkworm manure, is highly nutritious and has a crude protein content of 15.4%, making it second only to wheat bran and higher than rice bran and grass. This makes it an excellent feed source for livestock and poultry, and many farmers have reported positive results when using it in their feeding practices.
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. This leads to a higher slaughter rate. Additionally, sows that consume silkworm frass often experience increased milk production after excreting.
2. **Feeding sheep with silkworm frass**: Goats show improved milk secretion, and sheep produce more wool. Their fleece can grow longer than 14 cm, which is beneficial for wool quality and quantity.
3. **Feeding cattle with silkworm frass**: Cattle become more resilient and healthier, showing better resistance to common illnesses.
4. **Feeding rabbits with silkworm frass**: Rabbits tend to accumulate more fat and less water, which can improve meat quality and yield.
5. **Feeding chickens with silkworm frass**: Adding 5% silkworm frass to chicken feed significantly enhances the coloration of egg yolks, making them richer and more visually appealing.
6. **Feeding fish with silkworm frass**: Fish fed with silkworm frass are less prone to disease and grow faster. For every ton of silkworm frass, approximately 100 kilograms of fresh fish can be raised.
Despite its high nutritional value, fresh silkworm frass cannot be stored for long periods due to its tendency to spoil and mold. To extend its shelf life, it should be dried thoroughly until the moisture content drops below 15%. Alternatively, it can be fermented by storing it in large silos, cement pits, or other containers, ensuring it is tightly packed to promote lactic acid fermentation.
It's also important to note that silkworm frass may contain pathogens from diseased silkworms. Therefore, when used as animal feed, it should be stored in shaded areas away from direct sunlight, preferably in a controlled environment like a silkworm greenhouse to maintain quality and safety.
By properly managing and utilizing silkworm frass, farmers can not only improve animal health and productivity but also make efficient use of a valuable agricultural byproduct.
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