Method for refreshing Chinese dates

A fresh-keeping method and technology of jujube are applied in the directions of fruit and vegetable fresh-keeping, food preservation, and fruit/vegetable preservation by freezing/refrigeration, etc., which can solve the problems of inability to guarantee fruit products, and achieve the effects of good fresh-keeping effect, simple steps and easy preparation.

Inactive Publication Date: 2011-02-23
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method is a commonly used conservative preservation method
And Chinese patent CN 101380039A discloses a safe and efficient fresh-keeping method for fresh blueberries. After harvesting, it is sterilized by ozone water. Within a few hours, the vacuum pre-cooler is used to extract the field heat. After packaging, it is placed in a cold storage to keep fresh. The fruit is not guaranteed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of fresh-keeping method of jujube, comprises the steps:

[0029] 1) 20 to 40 days before picking, spray preservative A twice on Jujube;

[0030] In terms of mass fraction, preservative A contains 0.2% chitosan, 0.01% gibberellin, 0.1% CaCl 2 and 0.1% Tween 80, the rest is water;

[0031] 2) Harvesting with fruit stalks during picking, and sorting the picked jujubes into reddish, semi-red and full red according to their colors;

[0032] Within 3 to 5 hours after picking, spray 1% water on the collected jujube, and then pre-cool at -1 to 2°C for 10 minutes under a vacuum of 300 Pa;

[0033] 3) Soak the pre-cooled jujube in preservative B for 1 min, take it out and drench it, then seal and store the jujube in a fresh-keeping bag added with a gas regulator. The gas regulator is packaged separately. The mass ratio of jujube in is 1:50;

[0034] Then transfer the jujubes to the cold storage, and pile them up for fresh-keeping storage at -1-2°C, and leave air passag...

Embodiment 2

[0039] A kind of fresh-keeping method of jujube, comprises the steps:

[0040] 1) 20 to 40 days before picking, spray preservative A twice on Jujube;

[0041] In terms of mass fraction, preservative A contains 0.7% chitosan, 0.03% gibberellin, 0.3% CaCl 2 and 0.5% Tween 80, the rest is water;

[0042] 2) Harvesting with fruit stalks during picking, and sorting the picked jujubes into reddish, semi-red and full red according to their colors;

[0043] Within 3 to 5 hours after picking, spray 10% water on the collected jujubes, and then pre-cool them at -1 to 2°C for 30 minutes under a vacuum of 600 Pa;

[0044] 3) Soak the pre-cooled jujube in preservative B for 10 minutes, take it out and drench it, then seal and store the jujube in a fresh-keeping bag added with a gas regulator. The gas regulator is packaged separately. The mass ratio of jujube in is 1:150;

[0045] Then transfer the jujubes to the cold storage, and pile them up for fresh-keeping storage at -1-2°C, and lea...

Embodiment 3

[0050] A kind of fresh-keeping method of jujube, comprises the steps:

[0051] 1) 20 to 40 days before picking, spray preservative A twice on Jujube;

[0052] In terms of mass fraction, preservative A contains 0.5% chitosan, 0.02% gibberellin, 0.2% CaCl 2 and 0.25% Tween 80, the rest is water;

[0053] 2) Harvesting with fruit stalks during picking, and sorting the picked jujubes into reddish, semi-red and full red according to their colors;

[0054] Within 3 to 5 hours after picking, spray 5% water on the collected jujube, and then pre-cool at -1 to 2°C for 20 minutes under a vacuum of 400 Pa;

[0055] 3) Soak the pre-cooled jujube in preservative B for 3 minutes, take it out and drench it, and seal and store the jujube in a fresh-keeping bag added with a gas regulator. The mass ratio of jujube in is 1:100;

[0056] Then transfer the jujubes to the cold storage, and pile them up for fresh-keeping storage at -1-2°C, and leave air passages between bags and between piles;

[...

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PUM

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Abstract

The invention discloses a method for refreshing Chinese dates. The method comprises the following steps of: 1) spraying an antistaling agent A on the Chinese dates twice or three times 20 to 40 days before picking; 2) picking the Chinese dates with stems, spraying water in an amount which is 1 to 10 mass percent of the collected Chinese dates within 3 to 5 hours after picking, and pre-cooling the Chinese dates at the temperature of between -1 and 2 DEG C under the 300 to 600 Pa vacuum condition for 10 to 30 min; and 3) soaking the pre-cooled Chinese dates in an antistaling agent B for 1 to 10 min, taking out and draining, sealing and preserving in freshness protection packages with gas regulator, and refreshing and storing at the temperature of between -1 and 2 DEG C. In the method for refreshing the Chinese dates, comprehensive refreshing technology, which comprises the steps of spraying the antistaling agent before picking, classifying and collecting the picked Chinese dates, performing vacuum pre-cooling in real time in fields, soaking in the antistaling agent after pre-cooling, adding the gas regulator and storing in a refrigeration house at low temperature is adopted; in the whole refreshing link, a relatively mild environment is adopted, so that the nutrition components, appearance and flavor of the Chinese dates are well preserved; moreover, the method has simple steps, the antistaling agent is easy to prepare and the storage conditions are easy to implement and the method is suitable for practical production.

Description

technical field [0001] The invention belongs to the technical field of fresh-keeping of agricultural products, and in particular relates to a fresh-keeping method of jujube. Background technique [0002] Jujube will lose water, shrink, become soft and moldy after being stored at room temperature for 3 to 5 days, accompanied by a large loss of Vc, which reduces its original edible quality and commodity value, and seriously restricts the jujube industry. benign development. At present, jujube is mostly stored in cellars at low temperature, and there is no complete scientific fresh-keeping method. [0003] Chinese patent CN 101040629A discloses "Jinling jujube storage and preservation method", which stops irrigation before the jujube is picked, picks with handles, sorts by color, and pre-cools and puts in bags and packs. But this method is a commonly used conservative preservation method. And Chinese patent CN 101380039A discloses a safe and efficient fresh-keeping method fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B7/00A23B7/154A23B7/148A23B7/04
Inventor 许牡丹刘青毛跟年李彦军
Owner SHAANXI UNIV OF SCI & TECH
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