Detailed Explanation of Key Points of Mixing Substrate for Substitute Material Cultivation of Shiitake Mushrooms

Weigh according to the proportion requirements of various raw and auxiliary materials and water in the formula. Specific operation method: spread the weighed raw materials such as sawdust and cottonseed hulls flat on the cement floor, pile them into a small hill shape, then evenly sprinkle bran, gypsum powder, etc. on top, mix repeatedly and evenly with a hoe or shovel, and make a pile with a concave middle. Add the pre-dissolved white sugar, potassium dihydrogen phosphate, etc. to an appropriate amount of clean water, mix well, and splash it onto the material. Mix several times with a shovel and broom so that various raw materials and water are stirred evenly, then bag and make sticks. When making mushroom sticks, according to the different raw materials and auxiliary materials, flexibly control the water content of the culture material. If the material can be formed into a ball when pinched by hand, but water overflows between the fingers, and it disperses when gently placed on the ground, the water content is moderate; if water overflows between the fingers when the material is pinched by hand, it indicates that the moisture is on the high side. If the moisture content is on the high side, the aeration of the culture medium is poor, the mycelium grows slowly, and it is easy to cause contamination by miscellaneous bacteria; if the water content is on the low side, it likewise hinders the growth of the mycelium. Therefore, the water content must be well controlled.