Special freshness-preserving agent for sweet potatoes and preparation method thereof

Abstract

The invention provides special freshness-preserving agent for sweet potatoes. The special freshness-preserving agent for the sweet potatoes is prepared from the following ingredients in percentage by mass: 4-8% of compound plant extracts, 1-3% of wall-broken rape pollen, 1-3% of chitosan, 3-6% of plant ash, and 80-91% of distilled water. The invention further provides a preparation method of the special freshness-preserving agent for the sweet potatoes. The special freshness-preserving agent for the sweet potatoes disclosed by the invention is high in safety performance and free of harms on human body; moreover, the freshness preservation method utilizing the special freshness-preserving agent is simple in processes, good in freshness preservation effect, and capable of very well prolonging the freshness preservation time of the shelf lives of the sweet potatoes. Being stored with the freshness-preserving agent for 9 months, the sweet potatoes are still relatively fresh, and the original color and taste of the sweet potatoes are preserved; and no rotten sweet potato is observed during the preservation processes of the sweet potatoes. Moreover, tests have proven that the sweet potatoes contain no toxic components, and can be safely eaten.

Description

technical field [0001] The invention relates to the field of fresh-keeping of sweet potatoes, in particular to a special fresh-keeping agent for sweet potatoes and a preparation method thereof. Background technique [0002] Sweet potato is also called sweet potato, sweet potato, red moss, sweet potato, sweet potato. Sweet potato is one of the main food crops in my country. Sweet potato contains carotene, vitamins, lysine and other anti-cancer substances, and has high nutritional and medicinal value. The harvest season of sweet potatoes is autumn, and the preservation of sweet potatoes is a relatively difficult problem. Generally, sweet potatoes will sprout when placed in a place with too high temperature; It is easy to be frozen and form a hard core; sweet potatoes at room temperature can only be stored for about 50-60 days. [0003] At present, the storage methods of sweet potatoes include indoor storage method and cellar storage method. The indoor storage method is gener...

AI Technical Summary

Problems solved by technology

The cellar storage method is relatively simple, but if the underground temperature is too low, it is easy to freeze and damage, the temperature control is not good, and rot will occur when the temperature is too high

[0004] In order to improve the storage problem of sweet potatoes, people have developed some sweet potato preservatives, but the existing sweet potato preservatives are all based on pesticide fungicides, which have certain toxicity, and residues on sweet potatoes will affect human health; and sweet potatoes Pathogenic bacteria are prone to develop resistance to pesticides and fungicides, and their fresh-keeping effect is not good, and sweet potatoes are harvested in autumn. The price of sweet potatoes at this time is relatively low, which will discourage farmers' desire to plant sweet potatoes, and in spring and summer The price of sweet potatoes is much higher