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The rapid development of the factory production of wood-rotting fungi in my country has produced a large amount of fungus residue. Fungus residue contains more cellulose, hemicellulose and lignin, as well as rich mycelial protein, fat, amino acids, minerals and mycelial secondary metabolites, which are high-quality raw materials for the factory production of straw mushrooms.

1. Pleurotus eryngii fungus residue

The main raw materials for the cultivation of Pleurotus eryngii are sawdust, corn cobs, bagasse, cottonseed hulls, bran, rice bran, soybean meal, etc. The nitrogen content of the formula is generally 1.6%~2.0%. During the growth of mycelium and the formation of fruiting bodies, a large amount of nitrogen in the culture medium is absorbed by the mycelium and converted into mycelial protein: after entering the vegetative reproduction stage, part of the nitrogen is transferred to the fruiting body. The total amount of nitrogen in the culture medium has decreased, but Pleurotus eryngii continuously metabolizes to produce C02 throughout the growth cycle, which is released into the air with water, and the carbon, hydrogen, oxygen, etc. in the culture medium are also reduced. The residue after the fruiting is very suitable for the cultivation of straw mushrooms due to its texture and high nitrogen content.

2. Flammulina velutipes residue

The raw materials for the cultivation of Flammulina velutipes include corn cobs, rice bran, bran, cottonseed hulls, soybean skins, beer grains, etc., especially corn cobs and rice bran. The entire cultivation process from mixing to the end of fruiting takes about 55 days. The moisture content of fresh bottle-grown Flammulina velutipes residue is about 50%, and the nitrogen content is 1.2%~1.4%. Its texture is loose, and it almost does not contain mushroom roots and skins. It is a high-quality raw material for cultivating straw mushrooms. During cultivation, it can be fermented directly or mixed with straw, waste cotton, etc., but try to use fresh Flammulina velutipes residue.

3. Real mushroom residue

The cultivation cycle of real mushrooms is relatively long. When using pure real mushroom residue for fermentation, it is easy to harden and have poor aeration, which will cause obstacles to the fruiting of straw mushrooms. Fermentation of mushroom residue with straw, waste cotton, antler mushroom residue in proportion can achieve better results. The main reason is that the presence of straw, waste cotton, antler mushroom residue and other materials provides a better porosity for the culture medium, which is conducive to the mycelium to fully utilize the moisture and nutrients of the culture medium during the cultivation process.

4. Antler mushroom residue

In recent years, with the determination of the production and consumption patterns of antler mushrooms, the antler mushroom industry has developed rapidly. The main raw materials used for the cultivation of antler mushrooms are sawdust, corn cobs, cottonseed hulls, bran, rice bran, corn flour and other raw materials. The texture of the residue after the mushroom is finished is relatively loose. The adhesion between the residues after fermentation in the process of cultivating straw mushrooms is poor. 5% short straw can be added to the formula to effectively increase the air permeability of the formula, and 10% waste cotton can be added to increase the adhesion between the residues.