Preservation and fresh-keeping method of nectarines, preservation and fresh-keeping reagent and application of preservation and fresh-keeping reagent in preservation and fresh-keeping of nectarines

Abstract

The invention discloses a preservation and fresh-keeping method of nectarines. The preservation and fresh-keeping method comprises the following steps: 1) grinding ginkgo leaves into powder with liquid nitrogen, and carrying out ethanol extraction, filtration, column chromatography, distillation and concentration, redissolution and low-temperature drying to obtain a ginkgo leaf extract; extractinga ginkgo seed kernel extract by a Tris-HCL buffer solution; and mixing the ginkgo seed kernel extract with the ginkgo leaf extract in proportion; (2) uniformly spraying a diluted mixed extract on surfaces of nectarines, and performing blow-drying or air-drying; and 3) placing the nectarines in anti-fog bags and performing cold storage after precooling. By use of preservation and fresh-keeping effects of the ginkgo seed kernel extract and the ginkgo leaf extract, the preservation and fresh-keeping effects on fruits can be realized as well after the cold storage temperature is increased to 5-7DEG C, degradation of sugar acid of fruits and loss of aromatic substances can be significantly inhibited, energy can be saved, and the comprehensive effects of preservation and fresh-keeping can be realized.

Description

technical field [0001] The invention relates to an anti-corrosion and fresh-keeping method for nectarines and the application of ginkgo seed kernels and ginkgo leaf extracts combined with low-temperature refrigeration technology in anti-corrosion and fresh-keeping of nectarines, and belongs to the technical field of fruit fresh-keeping. Background technique [0002] Nectarine (Prunus persica L.var.nectarine MaXim) belongs to the family Rosaceae and the genus Peach. Popular with the public. However, due to its high temperature, high humidity and rainy season in Shanghai when it matures, and its thin skin, soft meat, and rich juice, it is not resistant to storage and transportation, so it is very vulnerable to mechanical damage during postharvest transportation and storage, which will lead to microbial infection and rot. Low-temperature refrigeration can prolong the storage period of nectarine fruit, but refrigeration at too low a temperature will make the fruit skin fragile,...

AI Technical Summary

Problems solved by technology

However, due to its high temperature, high humidity and plum rain season in Shanghai when it matures, and its thin skin, soft meat, and rich juice, it is not resistant to storage and transportation, so it is very vulnerable to mechanical damage during postharvest transportation and storage, which will lead to microbial infection and rot.

Low-temperature refrigeration can prolong the storage period of nectarine fruit, but refrigeration at too low a temperature will make the fruit skin fragile, and the pulp is prone to flocculation, browning, juice reduction, sugar-acid imbalance, and aroma loss. Fruits are more susceptible to rot and deterioration due to the infection of external microorganisms

During the cold storage period, if fresh-keeping bags are used, the surface of the fruit is prone to condensation and frostbite, resulting in an increase in the rate of fruit decay; if the fresh-keeping bag is not used, it is easy to cause dehydration, shrinkage and other quality deterioration symptoms of the fruit, which greatly reduces the economic value and edible value of the fruit.

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