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When designing the formula, consider the nutrition of raw materials, supply stability, price and storage cycle,

and reasonably match the proportion of raw materials to obtain a culture medium formula with better input-output. 

The yield is not only related to the nutrition of the culture medium, but also needs to pay attention to its water 

holding capacity and porosity to ensure uniform moisture and good air permeability.

Formula 1: 47% cottonseed hulls, 15% bran, 15% corn cobs, 13% sawdust, 5% corn flour, 3% soybean meal,

 2% calcium hydroxide.

Formula 2: 52% cottonseed hulls, 15% bran, 12% corn cobs, 12% sawdust, 5% corn flour, 2% soybean meal, 

2% calcium hydroxide.

(1) Cottonseed hulls: Cottonseed hulls are the main raw material for bag-grown Baiyu Mushroom, and

different sources have different characteristics. Cottonseed hulls with cotton kernels and cottonseed hulls are

often selected for bag cultivation. Cotton kernel protein provides nitrogen source for mycelium. In order to

increase the yield of Baiyu Mushroom, some edible fungi companies will require cottonseed hull processing 

plants to add cotton kernel powder to cottonseed hulls. The price of cottonseed hulls varies with the amount 

of cotton kernel powder added.

2) Sawdust selection and treatment: Sawdust is often used as a cultivation raw material for white jade mushrooms. 

Sawdust particles that are too fine affect air permeability and fungus growth speed, while those that are too coarse

affect water holding capacity and mycelium utilization rate. Enterprises need to determine the size of sawdust according

to the raw material structure, remove impurities, wood blocks and bark, etc., and then water and ferment. With the

improvement of environmental protection requirements, enterprises have begun to recycle sawdust spray water for reuse, 

and the feedback is normal.

(3) Corn cobs are red and white. White is easy to absorb water, while red is hard and not easy to absorb water. 

Both can be used for white jade mushroom cultivation, but the red one needs to extend the stirring time to ensure water

penetration and avoid contamination. Some enterprises use lime water to soak and pre-wet corn cobs for sterilization. 

Corn flour for production needs to be fresh, free of mold and impurities. It is recommended to purchase fresh corn kernels

and crush them by yourself to avoid inferior or adulterated materials.

(4) Calcium hydroxide (slaked lime) is generally used to adjust the pH of the culture medium in white jade mushroom cultivation.

The amount of calcium hydroxide (slaked lime) added should be slightly different according to seasonal changes. The proportion

should be appropriately increased during high temperatures in summer to prevent acidification caused by excessive temperatures.