Chinese yam preservative, preparation method of preservative and normal temperature fresh-keeping method for Chinese yams

[0032] A kind of yam fresh-keeping agent, described yam fresh-keeping agent comprises the soil deep layer soil that weight ratio is 10:1:2: copper sulfate solution: the slime that lime aqueous solution is formulated; Described copper sulfate solution is the copper sulfate of 0.4wt% solution; the lime aqueous solution is 1.5wt% lime aqueous solution.

[0034] Preparation of copper sulfate solution: Take 5 grams of agricultural copper sulfate and add 1 kg of water, stir evenly until completely melted.

[0035] Preparation of lime solution: Take 2.0kg of quicklime, add 50kg of water and stir until the lime is completely dissolved, then stir for 5 minutes, let it stand for more than 4 hours, take the supernatant, and mix it with water at a ratio of 1:1.

[0036] Preparation of slime: excavate the deep soil below 1 meter underground, according to the weight ratio of 10:1:2, first add the prepared copper sulfate solution and stir evenly, then add the prepared lime aqueous solution, and stir evenly to obtain The yam preservative.

[0038] Preparation of copper sulfate solution: Take 4 grams of agricultural copper sulfate and add 1 kg of water, stir evenly until completely melted.

[0039] Preparation of lime aqueous solution: Take 1.2kg of quicklime, add 50kg of water and stir until the lime is completely dissolved, then stir for 6 minutes, let it stand for more than 4 hours, take the supernatant, and mix it with water at a ratio of 1:1.

[0040] Preparation of slime: excavate the deep soil below 1 meter underground, according to the weight ratio of 10:1.2:2.2, first add the prepared copper sulfate solution and stir evenly, then add the prepared lime aqueous solution, and stir evenly to obtain The yam preservative.