The details of sweet potato fermented feed require careful attention to several key factors to ensure a successful and effective fermentation process. Here are the essential points to consider:
1. **Moisture Adjustment**: The ideal moisture content for good fermentation is between 65% and 75%. To check, take a handful of the material and squeeze it. If you see a clear watermark between your fingers without any dripping, it's just right. Too dry will slow down fermentation, while too wet can lead to spoilage and unpleasant odors.
2. **Temperature Control**: The initial temperature during fermentation should be maintained at around 15–20°C. This range promotes optimal microbial activity and helps the fermentation process go smoothly.
3. **Fermentation Management**: The material must be completely sealed but not compressed. If using a container that isn’t fully airtight, wrap it with plastic bags or cloth and secure it tightly. Once sealed, do not open or mix the contents during fermentation, as this can introduce contaminants. Fermentation typically takes 1–3 days, depending on conditions. A properly fermented product will have a pleasant sour or aromatic smell. After each feeding, make sure to reseal the container immediately. It’s recommended to use large containers or bags, and during fermentation, you can add smaller individual bags (10–30 kg) for easier handling. Once finished, the fermented product can be stored in small bags, dried at low temperatures, or granulated for long-term preservation. Always feed according to the required guidelines.
4. **Fermentation Environment**: For best results, try to use mixed materials rather than fermenting a single ingredient alone. Adding small amounts of corn flour, wheat bran, or rice bran can enhance the fermentation process. When stacking or loading materials into containers, avoid compacting them. Always reseal the container immediately after taking out some material to prevent contamination. Never use spoiled or smelly raw materials, as they can ruin the entire batch. Improper storage after fermentation may lead to mold or bad odors, making the feed unsuitable for animals.
5. **Usage and Dosage**: The fermented sweet potato feed can be used directly or mixed with other premixed feeds. When starting with small batches, it’s advisable to use at least 100 kg per batch to ensure consistent fermentation and better results.
By following these steps carefully, you can produce high-quality fermented feed that is both nutritious and safe for animal consumption.
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