Dual-component coating film fresh keeping agent for citrus fruits and application method of dual-component coating film fresh keeping agent for citrus fruits

Abstract

The invention relates to a dual-component coating film fresh keeping agent for citrus fruits. The fresh keeping agent comprises an A component and a B component, wherein the A component comprises thefollowing components in percentage by mass of 1%-5% of low molecular weight chitosan, 2%-10% of plant extracts, 0.5%-2% of sorbitol, and the balance distilled water; and the B component comprises thefollowing components in percentage by mass of 0.5%-3% of high molecular weight chitosan, 0.1%-2% of citric acid, 0.2%-3% of a propolis extract and the balance distilled water. An application of the dual-component coating film fresh keeping agent for citrus fruits comprises the following steps of performing cleaning: cleaning fresh fruits which a freshly picked, removing surface impurities and performing draining; coating films: performing coating film treatment on the cleaned fresh fruits with the dual-component coating film fresh keeping agent for citrus fruits in manners of soaking or sprinkling,; and performing air drying: air drying the fresh fruits after coating film treatment, and then performing storage in a freezer. According to the obtained dual-component coating film fresh keeping agent, the raw materials and auxiliary materials, which are used, are non-toxic and pollution-free, and the problems of security risks and environmental pollution of a chemical antibacterial fresh keeping agent are solved.

Description

technical field [0001] The invention relates to the technical field of fresh-keeping of agricultural products, in particular to a two-component film-coated fresh-keeping agent for citrus fruits and an application method thereof. Background technique [0002] Citrus fruits include tangerines, tangerines, oranges, pomelo, kumquats, and trifoliate oranges. There are hundreds of specific varieties. Because they are rich in nutrients such as vitamins, dietary fiber, and plant compounds, they are widely loved by consumers. One of the staple fruits. my country's citrus fruit production ranks first in the world, reaching 41.38 million tons in 2018, accounting for 27% of the world's total. At the same time, the post-harvest rot rate of citrus fruits in my country is as high as 15%, which is much higher than that of foreign developed countries. Fruit rot caused by pathogenic bacteria is the most important loss of citrus fruits after harvest. Green mold and blue mold are the two most...

AI Technical Summary

Problems solved by technology

Although chitosan and its derivatives have certain antibacterial activity, they have no obvious inhibitory effect on the two major pathogens of citrus fruits. The antibacterial and fresh-keeping effect of a single chitosan coating on other pathogenic bacteria is also limited, and it is often used as a carrier of active ingredients basement membrane

At the same time, studies have shown that fruits that are only treated with plant extracts will have a decline in the nutritional content and sensory quality of the fruit due to water loss in the late storage period, which will affect the commodity value.

Images