Method for preparing organic fertilizer on basis of corn straws and pleurotus eryngii mushroom dregs

[0018] The method for preparing organic fertilizer based on corn stalks and Pleurotus eryngii slag of the present invention will be described in detail below in conjunction with examples.

[0019] A method for preparing organic fertilizer based on corn stalks and Pleurotus eryngii mushroom residue is carried out according to the following steps:

[0020] Step 1. At room temperature, put the domestic garbage of the garbage factory, the factory cultivated Pleurotus eryngii mushroom residue and the corn stalks into the fermentation tank and mix them evenly, and adjust the water content of the whole system to 57wt%, and adjust the carbon of the whole system with urea. The nitrogen mass ratio is 35:1, of which the mass ratio of domestic waste from garbage plants, factory-grown Pleurotus eryngii mushroom residue and corn stalks is 46:45:17. The domestic waste has comprehensive nutrition, and contains the following nutrient components by mass percentage: total nitrogen 1.5 wt%, total phosphorus 0.9 wt%, and total potassium 0.4 wt%. Pleurotus eryngii mushroom residue and corn stover have high organic matter content and complete nutrients, so it is a good raw material for producing high-quality organic fertilizer. The use of factory-grown Pleurotus eryngii mushroom residue as an organic fertilizer raw material in the formula not only fully utilizes the remaining nutrients of the mushroom residue, saves resources, and avoids environmental pollution caused by discarding. Pleurotus eryngii mushroom residue in factory cultivation is mainly made of cottonseed hulls, wood chips, corn cobs, drum shells, rice bran, and soybean meal as auxiliary materials. Its carbon content is higher than that of general edible fungus residues, so it needs to be less suitable for plant cultivation. Carbon-nitrogen ratio, so add a small amount of corn stover with high nitrogen, phosphorus and potassium content as raw materials to prepare organic fertilizer with suitable carbon-nitrogen ratio. The dregs fermented by the turning machine are balanced and rich in nutrients. It contains about 80% by weight of organic matter, about 36.3% by weight of humic acid, about 12-21% by weight of protein, and about 16.2% by weight of amino acids, and contains large, medium and trace elements required by crops. , Especially zinc, boron, copper, iron, calcium, magnesium and other elements necessary for crop growth. Because the domestic waste used in fertilizer is sorted, sieved step by step, and inspected layer by layer, it fully meets the national production indicators of organic fertilizer. The utilization rate of domestic waste, bacterial residue and corn stalks is high, which is environmentally friendly and practical.

[0021] Step 2: The mixture obtained in step 1 is heated to 57°C and fermented for 15 days until the water content is less than 30wt% to stop the fermentation, and the temperature is naturally lowered to room temperature, wherein during the fermentation, the mixture is tossed every 24 hours;

[0022] In step 3, the mixture obtained in step 2 is moved to a post-cooking warehouse and continues to be piled and fermented until the water content is reduced to 25% by weight, and the organic fertilizer is obtained. The organic fertilizer can improve soil fertility, is suitable for the growth and use of various crops, and can improve soil fertility without harming soil structure. The method for preparing organic fertilizers retains the nutrients of raw materials to the utmost extent, while reducing time cost and raw material loss.