Fresh keeping agent for fresh dendrobium twigs as well as preparation method and use method of fresh keeping agent

Abstract

The invention discloses a fresh keeping agent for fresh dendrobium twigs as well as a preparation method and a use method of the fresh keeping agent. The fresh keeping agent comprises, in percentage by weight, 1%-4% of food-grade pullulan, 0.1%-2% of food-grade chitosan oligosaccharide, 0.1%-2% of food-grade mannan oligosaccharide, 0.5%-2.5% of food-grade glycerin and the balance of water. The picked fresh dendrobium twigs are subjected to preliminary finishing, immersed in the fresh keeping agent for 30-60 seconds and taken out to be aired; or cuts of the fresh twigs are immersed in the fresh keeping agent for 30-60 seconds, then, the fresh keeping agent is sprayed on the fresh twigs at 360 degrees, the fresh twigs are aired, the fresh twigs treated with the fresh keeping agent are directly put in a shady, cool and dry place for storage or put in the shady, cool and dry place for storage after being subjected to vacuum package or put at the temperature ranging from 4 DEG C to 12 DEG C for cold storage. The raw materials used for the fresh keeping agent are all food-grade, the fresh keeping agent doesn't contain a preservative and is safe, non-toxic, cheap and easy to obtain; the treated fresh twigs can be preserved for one year to one and a half year, and the water loss is smaller than 1%; the germination rate is very low, characteristics and nutritional ingredients of the fresh dendrobium twigs can be kept, and follow-up processing is not affected.

Description

technical field [0001] The invention relates to a preservative for fresh dendrobium bark, a preparation method and a use method thereof, and belongs to the category of preservatives for food and medicinal plant raw materials. Background technique [0002] Dendrobium is a rare and commonly used traditional Chinese medicinal material. It is sweet in taste and slightly cold in nature. It has the effects of nourishing the stomach and promoting fluid, nourishing yin and clearing away heat. The eating method is to squeeze juice directly from the fresh strips or make soup, and to drink tea or make soup for the offspring of Fengdou made from the fresh strips. The genus Dendrobium is a perennial herbaceous epiphyte of Orchidaceae. There are about 1,500 species of wild Dendrobium in the world, and there are 76 species in my country, including 74 species and 2 varieties. After more than 100 years of exploration, there have been planting modes such as natural forest stocking, transplan...

AI Technical Summary

Problems solved by technology

Among them, the chemically synthesized preservative potassium sorbate may exceed the standard when eaten, and its acceptance is not as good as that of natural preservatives

Chinese invention patent application CN102893773A discloses a modified atmosphere fresh-keeping method for Dendrobium nodrobii. The fresh bar of Dendrobium is kept at a storage temperature of 0±0.3°C, an oxygen volume concentration of 2%~3% in the storage, and a carbon dioxide volume concentration of 8. %~10% and a relative humidity of 90%~95%, the implementation of this invention requires more expensive equipment and higher energy consumption and management costs