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Method for prolonging low-temperature preservation time of purple red dragon fruits

A technology for low-temperature storage and dragon fruit, which is applied in the fields of fruit and vegetable preservation, food preservation, and food science. It can solve the problems of easy cold damage and short shelf life at room temperature, and achieve extended shelf life at room temperature, simple operation, and extended low-temperature storage time. Effect

Inactive Publication Date: 2019-04-26
GUIZHOU FRUIT INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the low-temperature storage method of Zihonglong dragon fruit is to harvest after the pericarp has completely turned red, and store it at a temperature below 7°C, which is prone to chilling injury. The effective storage period is about 15 days, and it is stored at a temperature above 10°C. The effective storage period is 15- 18 days, and after being refrigerated, the shelf life of purple dragon fruit at room temperature is short, 1-2 days

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The method for prolonging the low-temperature storage time of Zihonglong dragon fruit comprises the following steps:

[0017] (1) Harvest when the skin of Zihong dragon fruit is completely colored and has not completely turned red, and quickly dissipate the heat in the field;

[0018] (2) Soak with 75mg / L chlorine dioxide solution for 5 minutes;

[0019] (3) Soak with 8mmol / L oxalic acid for 10min after draining;

[0020] (4) After draining, store in a cold storage at 0-1°C for 4 days;

[0021] (5) Wait until the core temperature is close to the pre-storage temperature, and pack it in a high-pressure polyethylene plastic bag after there is no condensation on the surface of the peel. The thickness of the high-pressure polyethylene plastic bag is 0.02mm, and 10 holes are punched. Release type 1-MCP paper sheets, 15 single-layer fruits per box, tied with plastic bags;

[0022] (6) Raise the storage temperature to 10.5±0.5°C for 2 days, and adjust the storage temperature...

Embodiment 2

[0025] The method for prolonging the low-temperature storage time of Zihonglong dragon fruit comprises the following steps:

[0026] (1) Harvest when the skin of Zihong dragon fruit is completely colored and has not completely turned red, and quickly dissipate the heat in the field;

[0027] (2) Soak with 80mg / L chlorine dioxide solution for 5 minutes;

[0028] (3) Soak with 10mmol / L oxalic acid for 10min after draining;

[0029] (4) After draining, store in a cold storage at 0-1°C for 5 days;

[0030] (5) Wait until the core temperature is close to the pre-storage temperature, and pack it in a high-pressure polyethylene plastic bag after there is no condensation on the surface of the peel. The thickness of the high-pressure polyethylene plastic bag is 0.02mm, and 12 holes are punched. Release type 1-MCP paper or powder, 20 single-layer fruits per box, tied with plastic bags;

[0031] (6) Raise the storage temperature to 10.5±0.5°C for 2 days, and adjust the storage tempera...

Embodiment 3

[0034] The method for prolonging the low-temperature storage time of Zihonglong dragon fruit comprises the following steps:

[0035] (1) Harvest when the skin of Zihong dragon fruit is completely colored and has not completely turned red, and quickly dissipate the heat in the field;

[0036] (2) Soak with 85mg / L chlorine dioxide solution for 5 minutes;

[0037] (3) Soak with 12mmol / L oxalic acid for 10min after draining;

[0038] (4) After draining, store in a cold storage at 0-1°C for 4 days;

[0039] (5) Wait until the core temperature is close to the pre-storage temperature, and pack it in a high-pressure polyethylene plastic bag after there is no condensation on the surface of the peel. The thickness of the high-pressure polyethylene plastic bag is 0.02mm, and 12 holes are punched. Release type 1-MCP paper or powder, 20 single-layer fruits per box, tied with plastic bags;

[0040] (6) Raise the storage temperature to 10.5±0.5°C for 2 days, and adjust the storage tempera...

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Abstract

The invention relates to the technical field of low-temperature preservation, in particular to a method for prolonging the low-temperature preservation time of purple red dragon fruits. The method comprises the steps of harvesting the purple red dragon fruits before the peel of the dragon fruits completely turns red, and rapidly dispersing the field heat; soaking with 75-85mg / L chlorine dioxide solution for 5min; draining off and then soaking with 8-12mmol / L oxalic acid for 10min; after draining, pre-storing in a refrigeration storage at 0-1 DEG C for 4-5d; after the fruit core temperature isclose to the pre-storage temperature and the surface of the peel is not condensed, packaging in a high-pressure polyethylene plastic bag, raising the temperature of the storage to 10-11 DEG C and storing for 2d, and adjusting the temperature of the storage to 6-7 DEG C for storing. The method not only can prolong the low-temperature preservation time of the purple red dragon fruits and enables theeffective preservation time to reach 30d, but also can prolong the room temperature shelf life after the dragon fruits are refrigerated and leave the storage.

Description

technical field [0001] The invention relates to the technical field of low-temperature storage of tropical fruits, in particular to a method for prolonging the low-temperature storage time of purple dragon fruit. Background technique [0002] At present, the low-temperature storage method of Zihonglong dragon fruit is to harvest after the pericarp has completely turned red, and store it at a temperature below 7°C, which is prone to chilling injury. The effective storage period is about 15 days, and it is stored at a temperature above 10°C. The effective storage period is 15- 18 days, and after being refrigerated, the normal temperature shelf life of purple dragon fruit is short, 1-2 days. Contents of the invention [0003] Aiming at the above-mentioned technical problems, the invention provides a method for prolonging the low-temperature storage time of Zihonglong dragon fruit. [0004] The technical scheme adopted in the present invention is: [0005] The method for pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B7/154A23B7/157A23B7/152
CPCA23B7/152A23B7/154A23B7/157
Inventor 张绿萍袁启凤张兴无周俊良王宇曾帆
Owner GUIZHOU FRUIT INST
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