Sulfur dioxide controlled atmosphere preservation method of grapes

Abstract

The present invention discloses a sulfur dioxide controlled atmosphere preservation method of grapes. The method comprises the following steps: (1) whole ripen grapes without any mechanical injury anddisease and pest injury are placed in a single layer in a plastic basket with holes in five sides, and the grapes are put into a controlled atmosphere cold storage; (2) the grapes are precooled at -1to 1 DEG C for 24-30 h and 1-methylcyclopropene gas is used in a whole precooling period to conduct a sealed fumigation treatment; and (3) the treated grapes in the step (2) are preserved at a condition of -1 to 1 DEG C, a relative humidity of 85-90%, a SO2 volume concentration of 0.001-0.003%, an O2 volume concentration of 2-6%, a CO2 volume concentration of 2-8% and the balance of N2. The technology is used to preserve the grapes, can effectively prevent browning, dry stems and grain falling of the grape fruits, preserves quality of the fruits, extends a storage period, has a preservation period extended for 10-20 days compared with a common cold storage treatment, and is low in sulfur dioxide residual amount and high in quality.

Description

technical field

[0001] The invention belongs to the technical field of fresh-keeping of agricultural products, and relates to a modified atmosphere fresh-keeping method for grapes. Background technique

[0002] Grapes are juicy and delicious berry fruits. They contain a lot of nutrients such as sugar, organic acids, proteins, and vitamins. They have high nutritional and medicinal values ​​and are deeply loved by consumers. Grapes are easily infected by pathogens during post-harvest transportation and storage, which will lead to problems such as shattering and rot in grapes, which will affect the storage quality of grapes and cause certain economic losses. At present, the principle of grape preservation technology at home and abroad is mainly sulfur dioxide treatment combined with low temperature storage, in addition to ice temperature storage, oxygen combined with carbon dioxide controlled atmosphere storage, heat treatment, coating preservation, nitric oxide fumigation, ozo...

Examples

Embodiment 1

[0017] A modified atmosphere preservation method for grape sulfur dioxide, comprising the following steps:

[0018] (1) Harvest ripe grapes with no mechanical damage and no pests and diseases. After selection and pruning, remove defective and damaged fruits, place the ears in a single layer in plastic baskets with holes on five sides, and place 3kg of grapes in each basket. Plastic baskets are stacked and placed in a controlled-atmosphere refrigerator;

[0019] (2) Pre-cool at 0°C for 27 hours, and use 1 μL / L 1-methylcyclopropene gas-tight fumigation during the whole pre-cooling period;

[0020] (3) With the grapes processed in step (2), at 0 DEG C, the relative humidity is 87%, SO 2 Volume concentration is 0.002%, O 2 4% volume concentration, CO 2 The volume concentration is 5%, the balance is N 2 Keep fresh for 60 days under certain conditions.

[0021] In this example, Munage grapes were preserved. After 60 days of preservation, the fruit stems of the grapes were green...

Embodiment 2

[0023] A modified atmosphere preservation method for grape sulfur dioxide, comprising the following steps:

[0024] (1) Harvest ripe grapes with no mechanical damage and no pests or diseases. After selection and pruning, remove defective and damaged fruits, place the ears in a single layer in plastic baskets with holes on five sides, and place 2kg of grapes in each basket. Plastic baskets are stacked and placed in a controlled-atmosphere refrigerator;

[0025] (2) Pre-cool at 1°C for 24 hours, and use 0.5 μL / L 1-methylcyclopropene gas-tight fumigation during the whole period of pre-cooling;

[0026] (3) With the grapes processed in step (2), at 1 DEG C, the relative humidity is 85%, SO 2 Volume concentration is 0.001%, O 2 2% by volume, CO 2 The volume concentration is 2%, the balance is N 2 Keep fresh for 40 days under certain conditions.

[0027] Seedless white grapes were preserved in this example. After 40 days of preservation, the fruit stems of the grapes were green...

Embodiment 3

[0029] A modified atmosphere preservation method for grape sulfur dioxide, comprising the following steps:

[0030] (1) Harvest ripe grapes with no mechanical damage and no pests and diseases. After selection and pruning, remove defective and damaged fruit, place the ears in a single layer in plastic baskets with holes on five sides, and place 4kg of grapes in each basket. Plastic baskets are stacked and placed in a controlled-atmosphere refrigerator;

[0031] (2) Pre-cool at -1°C for 30 hours, and use 1.5 μL / L 1-methylcyclopropene gas-tight fumigation during the whole period of pre-cooling;

[0032] (3) With the grapes treated in step (2), at -1°C, the relative humidity is 90%, SO 2 Volume concentration is 0.003%, O 2 Volume concentration is 6%, CO 2 The volume concentration is 8%, the balance is N 2 Under certain conditions, it can be kept fresh for 90 days.

[0033] The red grape (Red Globe) grape was preserved in this embodiment. After 90 days of preservation, the fru...

technical field

[0001] The invention belongs to the technical field of fresh-keeping of agricultural products, and relates to a modified atmosphere fresh-keeping method for grapes. Background technique

[0002] Grapes are juicy and delicious berry fruits. They contain a lot of nutrients such as sugar, organic acids, proteins, and vitamins. They have high nutritional and medicinal values ​​and are deeply loved by consumers. Grapes are easily infected by pathogens during post-harvest transportation and storage, which will lead to problems such as shattering and rot in grapes, which will affect the storage quality of grapes and cause certain economic losses. At present, the principle of grape preservation technology at home and abroad is mainly sulfur dioxide treatment combined with low temperature storage, in addition to ice temperature storage, oxygen combined with carbon dioxide controlled atmosphere storage, heat treatment, coating preservation, nitric oxide fumigation, ozo...

Examples

Embodiment 1

[0017] A modified atmosphere preservation method for grape sulfur dioxide, comprising the following steps:

[0018] (1) Harvest ripe grapes with no mechanical damage and no pests and diseases. After selection and pruning, remove defective and damaged fruits, place the ears in a single layer in plastic baskets with holes on five sides, and place 3kg of grapes in each basket. Plastic baskets are stacked and placed in a controlled-atmosphere refrigerator;

[0019] (2) Pre-cool at 0°C for 27 hours, and use 1 μL / L 1-methylcyclopropene gas-tight fumigation during the whole pre-cooling period;

[0020] (3) With the grapes processed in step (2), at 0 DEG C, the relative humidity is 87%, SO 2 Volume concentration is 0.002%, O 2 4% volume concentration, CO 2 The volume concentration is 5%, the balance is N 2 Keep fresh for 60 days under certain conditions.

[0021] In this example, Munage grapes were preserved. After 60 days of preservation, the fruit stems of the grapes were green...

Embodiment 2

[0023] A modified atmosphere preservation method for grape sulfur dioxide, comprising the following steps:

[0024] (1) Harvest ripe grapes with no mechanical damage and no pests or diseases. After selection and pruning, remove defective and damaged fruits, place the ears in a single layer in plastic baskets with holes on five sides, and place 2kg of grapes in each basket. Plastic baskets are stacked and placed in a controlled-atmosphere refrigerator;

[0025] (2) Pre-cool at 1°C for 24 hours, and use 0.5 μL / L 1-methylcyclopropene gas-tight fumigation during the whole period of pre-cooling;

[0026] (3) With the grapes processed in step (2), at 1 DEG C, the relative humidity is 85%, SO 2 Volume concentration is 0.001%, O 2 2% by volume, CO 2 The volume concentration is 2%, the balance is N 2 Keep fresh for 40 days under certain conditions.

[0027] Seedless white grapes were preserved in this example. After 40 days of preservation, the fruit stems of the grapes were green...

Embodiment 3

[0029] A modified atmosphere preservation method for grape sulfur dioxide, comprising the following steps:

[0030] (1) Harvest ripe grapes with no mechanical damage and no pests and diseases. After selection and pruning, remove defective and damaged fruit, place the ears in a single layer in plastic baskets with holes on five sides, and place 4kg of grapes in each basket. Plastic baskets are stacked and placed in a controlled-atmosphere refrigerator;

[0031] (2) Pre-cool at -1°C for 30 hours, and use 1.5 μL / L 1-methylcyclopropene gas-tight fumigation during the whole period of pre-cooling;

[0032] (3) With the grapes treated in step (2), at -1°C, the relative humidity is 90%, SO 2 Volume concentration is 0.003%, O 2 Volume concentration is 6%, CO 2 The volume concentration is 8%, the balance is N 2 Under certain conditions, it can be kept fresh for 90 days.

[0033] The red grape (Red Globe) grape was preserved in this embodiment. After 90 days of preservation, the fru...