Our region is rich in straw and sweet potato resources, and local farmers have long practiced the traditional method of using sweet potatoes to produce fans through biofermentation. However, a large portion of the potato residue left after this process is often discarded, with only a small amount being used for animal feed. To make better use of these underutilized resources, the author conducted experiments on the mixed cultivation of *Hericium erinaceus* (Lion's Mane mushroom) using rice straw and sweet potato residue. The following details are provided for reference and practical application.
1. **Mycelium Selection**
It is essential to choose high-quality mycelium that exhibits strong vitality, uniform shape, fast growth, and good resistance to diseases. For the mother culture, PDA (Potato Dextrose Agar) medium is commonly used. The original strain is cultivated on a mixture of wood chips and wheat bran, which provides an ideal environment for mycelial development.
2. **Cultivation Substrate Formula**
The substrate composition includes 43% rice straw, 43% sweet potato residue, 12% corn flour, 1% gypsum powder, 0.5% superphosphate, and 0.5% sucrose. Each bottle is filled with approximately 171 grams of this mix. This balanced formula ensures optimal nutrient availability and moisture retention, supporting healthy mushroom growth.
3. **Cultivation Process**
Fresh, mold-free straw is selected and cut into small pieces of 1.5–2 cm in length. It is then soaked in a 1.5% lime water solution for 8 hours to disinfect and improve moisture absorption. After rinsing with clean water and draining, the straw is combined with the other ingredients. The pH of the mixture should be around 5.0. A total of 750 ml of mycelium is added to each bottle. The bottles are sealed with kraft paper and sterilized in an autoclave for one hour. Once cooled to below 26°C, the mycelium is inoculated. The incubation temperature is maintained between 22–27°C. When the mycelium fully colonizes the bottle and starts forming fruit bodies, the seal is removed. At this stage, the mushrooms are placed in a controlled environment with temperatures between 15–20°C and humidity levels of 80–90%. Water is sprayed 1–2 times daily to maintain moisture.
The *Hericium erinaceus* grown using this method demonstrates excellent yield and high biological efficiency, making it a promising alternative for utilizing agricultural by-products. This approach not only enhances resource utilization but also supports sustainable farming practices in the region.
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